outlet connection size
comment: Size of the outlet connection. Usually measured in millimeters (mm).
type: Property

Damper
subclass of: Restriction
  has value: nominal air flow rate
  on property: hasProperty
source: pset dampertypecommon.htm
type: Class
subclass of: Restriction
  on property: hasProperty
  has value: air flow rate range max
source: ifcdamper.htm
subclass of: Restriction
  has value: open pressure drop
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: close off rating
subclass of: Restriction
  on property: hasProperty
  has value: maximum working pressure
subclass of: Restriction
  on property: hasProperty
  has value: face area
subclass of: Restriction
  on property: hasProperty
  has value: operation temperature range
subclass of: Restriction
  on property: hasProperty
  has value: frame depth
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: blade thickness
subclass of: Restriction
  on property: hasProperty
  has value: frame thickness
comment: A damper typically participates in an HVAC duct distribution system and is used to control or modulate the flow of air.
subclass of: Restriction
  on property: hasProperty
  has value: leakage fully closed
subclass of: Flow controller
subclass of: Restriction
  on property: hasProperty
  has value: temperature rating

is contained in
inverse of: contains
type: TransitiveProperty
range: Physical object
comment: A relation between a physical object and the physical space in which it is contained.
type: ObjectProperty
domain: Physical object

manual override
comment: Identifies whether hand-operated operation is provided as an override (= TRUE) or not (= FALSE). Note that this value should be set to FALSE by default in the case of a Hand Operated Actuator.
type: DatatypeProperty
range: boolean

height
comment: Height of the vibration isolator before tha application of load. Usually measured in millimeters (mm).
type: Property

Air to air heat recovery
comment: An air-to-air heat recovery device employs a counter-flow heat exchanger between inbound and outbound air flow. It is typically used to transfer heat from warmer air in one chamber to cooler air in the second chamber (i.e., typically used to recover heat from the conditioned air being exhausted and the outside air being supplied to a building), resulting in energy savings from reduced heating (or cooling) requirements.
subclass of: Restriction
  on property: hasProperty
  has value: primary air flow rate range
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
source: pset airtoairheatrecoverytypecommon.htm
source: ifcairtoairheatrecovery.htm
subclass of: Restriction
  on property: hasProperty
  has value: operation temperature range
subclass of: Energy conversion device
subclass of: Restriction
  has value: secondary air flow rate range
  on property: hasProperty
subclass of: Restriction
  has value: secondary air flow rate range
  on property: hasProperty
subclass of: Restriction
  has value: primary air flow rate range
  on property: hasProperty
type: Class

Boiler
comment: A boiler is a closed, pressure-rated vessel in which water or other fluid is heated using an energy source such as natural gas, heating oil, or electricity. The fluid in the vessel is then circulated out of the boiler for use in various processes or heating applications.
subclass of: Restriction
  has value: heat transfer surface area
  on property: hasProperty
subclass of: Restriction
  has value: nominal part load ratio
  on property: hasProperty
source: ifcboiler.htm
type: Class
subclass of: Restriction
  has value: outlet temperature range
  on property: hasProperty
subclass of: Restriction
  has value: pressure rating
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: water inlet temperature range
subclass of: Restriction
  on property: hasProperty
  has value: water inlet temperature range
subclass of: Restriction
  has value: water storage capacity
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: outlet temperature range
source: pset boilertypecommon.htm
subclass of: Restriction
  has value: nominal energy consumption
  on property: hasProperty
subclass of: Energy conversion device

maximum working pressure
comment: Maximum working pressure. Usually measured in Pascals (Pa, N/m2).
type: Property

has lock
comment: Indication of whether a switching device has a key operated lock (=TRUE) or not (= FALSE).
type: DatatypeProperty
range: boolean

has exterior insulation
comment: TRUE if the silencer has exterior insulation. FALSE if it does not.
type: DatatypeProperty
range: boolean

has space
comment: Relation between a building or a building space and the spaces it can be divided into.
inverse of: isSpaceOf
type: ObjectProperty
type: TransitiveProperty

water requirement
comment: Make-up water requirement. Usually measured in m3/s.
type: Property

Building
source: ifcbuilding.htm
subclass of: SpatialThing
comment: A building represents a structure that provides shelter for its occupants or contents and stands in one place. The building is also used to provide a basic element within the spatial structure hierarchy for the components of a building project (together with site, storey, and space).
type: Class
subclass of: Restriction
  all values from: Building space
  on property: has space

first curvature radius
comment: FirstCurvatureRadius should be defined as the base or left side radius of curvature value. Usually measured in millimeters (mm).
type: Property

Audio visual appliance
subclass of: Restriction
  on property: hasProperty
  has value: audio volume
comment: An audio-visual appliance is a device that displays, captures, transmits, or receives audio or video. Audio-visual appliances may be fixed in place or may be able to be moved from one space to another. They may require an electrical supply that may be supplied either by an electrical circuit or provided from a local battery source. Audio-visual appliances may be connected to data circuits including specialist circuits for audio visual purposes only.
source: pset audiovisualappliancetypecommon.htm
source: ifcaudiovisualappliance.htm
subclass of: Flow terminal
type: Class

Interceptor
subclass of: Restriction
  has value: ventilating pipe size
  on property: hasProperty
subclass of: Flow treatment device
type: Class
comment: An interceptor is a device designed and installed in order to separate and retain deleterious, hazardous or undesirable matter while permitting normal sewage or liquids to discharge into a collection system by gravity.
subclass of: Restriction
  on property: hasProperty
  has value: outlet connection size
source: pset interceptortypecommon.htm
subclass of: Restriction
  on property: hasProperty
  has value: cover width
source: ifcinterceptor.htm
subclass of: Restriction
  on property: hasProperty
  has value: nominal body width
subclass of: Restriction
  has value: nominal body length
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: inlet connection size
subclass of: Restriction
  has value: cover length
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: nominal body depth

Building space
comment: An entity used to define the physical spaces of the building. A building space contains devices or building objects.
subclass of: SpatialThing
type: Class
subclass of: Restriction
  all values from: Class
    union of: Building
    union of: Building space
  on property: isSpaceOf
subclass of: Restriction
  on property: has space
  all values from: Building space
subclass of: Restriction
  all values from: Physical object
  on property: contains

Humidifier
subclass of: Restriction
  has value: water requirement
  on property: hasProperty
comment: A humidifier is a device that adds moisture into the air.
subclass of: Restriction
  has value: weight
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: nominal air flow rate
subclass of: Energy conversion device
source: ifchumidifier.htm
source: pset humidifiertypecommon.htm
subclass of: Restriction
  has value: nominal moisture gain
  on property: hasProperty
type: Class

nominal filter face velocity
comment: Filter face velocity. Usually measured in m/s.
type: Property

Shading device
subclass of: Restriction
  has value: visible light transmittance
  on property: hasProperty
source: ifcshadingdevice.htm
subclass of: Restriction
  on property: hasProperty
  has value: solar reflectance
subclass of: Restriction
  has value: solar transmittance
  on property: hasProperty
subclass of: Building device
comment: Shading devices are purpose built devices to protect from the sunlight, from natural light, or screening them from view. Shading devices can form part of the facade or can be mounted inside the building, they can be fixed or operable.
subclass of: Restriction
  has value: visible light reflectance
  on property: hasProperty
subclass of: Restriction
  has value: thermal transmittance
  on property: hasProperty
type: Class
source: pset shadingdevicecommon.htm

Energy conversion device
source: ifcenergyconversiondevice.htm
comment: The distribution flow element EnergyConversionDevice defines the occurrence of a device used to perform energy conversion or heat transfer and typically participates in a flow distribution system.
type: Class
subclass of: DistributionFlowDevice

switch function
type: DatatypeProperty
range: string
comment: Indicates types of switches which differs in functionality.

pump flow rate range
type: Property
comment: Allowable range of volume of fluid being pumped against the resistance specified. Usually measured in kg/s.

nominal supply voltage offset
comment: The maximum and minimum allowed voltage of the supply e.g. boundaries of 380V/440V may be applied for a nominal voltage of 400V.
type: ObjectProperty

nominal evaporating temmperature
comment: Chiller evaporating temperature.Usually measured in degrees Kelvin (K).
type: Property

water storage capacity
type: Property
comment: Water storage capacity. Usually measured in cubic metre (m3).

operating mode
type: DatatypeProperty
comment: Identifies the operating mode of the boiler.
range: string

Flow meter
source: ifcflowmeter.htm
type: Class
source: pset flowmetertypecommon.htm
comment: A flow meter is a device that is used to measure the flow rate in a system.
subclass of: Flow controller

SAREF4BLDG: an extension of SAREF for the building domain
issued: 2025-04-24
contributor: dragoni
license: etsi-software-license
creator: me
preferred namespace prefix: s4bldg
publisher: www.etsi.org
imports: v4.1.1
type: Ontology
version info: v2.1.1
creator: mpoveda
contributor: www.maxime-lefrancois.info
prior version: v1.1.2
source: saref4bldg
comment: Information about changes compared to version 1.1.1: - Updated namespaces for compatibility with SAREF v3.
modified: 2025-04-24
description: This ontology extends the SAREF ontology for the building domain by defining building devices and how they are located in a building. This extension is based on the ISO 16739:2013 Industry Foundation Classes (IFC) standard for data sharing in the construction and facility management industries. The descriptions of the classes and properties extracted from IFC have been taken from the IFC documentation.
comment: Information about changes compared to version 1.1.2: - see https://labs.etsi.org/rep/saref/saref4bldg/-/milestones/1.
version IRI: v2.1.1

Electric time control
comment: An electric time control is a device that applies control to the provision or flow of electrical energy over time.
source: ifcelectrictimecontrol.htm
source: pset electrictimecontroltypecommon.htm
type: Class
subclass of: Flow controller

compressor speed
type: Property
comment: Compressor speed. Usually measured in cycles/s.

open pressure drop
type: Property
comment: Total pressure drop across damper. Usually measured in Pascals (Pa, N/m2).

Valve
source: pset valvetypecommon.htm
subclass of: Flow controller
subclass of: Restriction
  on property: hasProperty
  has value: close off rating
subclass of: Restriction
  on property: hasProperty
  has value: flow coefficient
type: Class
subclass of: Restriction
  has value: test pressure
  on property: hasProperty
comment: A valve is used in a building services piping distribution system to control or modulate the flow of the fluid.
subclass of: Restriction
  has value: working pressure
  on property: hasProperty
source: ifcvalve.htm
subclass of: Restriction
  on property: hasProperty
  has value: size

temperature classification
type: DatatypeProperty
comment: Enumeration defining the temperature classification of the space heater surface temperature. low temperature - surface temperature is relatively low, usually heated by hot water or electricity. high temperature - surface temperature is relatively high, usually heated by gas or steam.
range: string

Space heater
subclass of: Restriction
  on property: hasProperty
  has value: thermal mass heat capacity
type: Class
subclass of: Restriction
  on property: hasProperty
  has value: body mass
subclass of: Flow terminal
comment: Space heaters utilize a combination of radiation and/or natural convection using a heating source such as electricity, steam or hot water to heat a limited space or area. Examples of space heaters include radiators, convectors, baseboard and finned-tube heaters. UnitaryEquipment should be used for packaged units supporting a combination of heating, cooling, and/or dehumidification; Coil should be used for coil-based floor heating.
source: ifcspaceheater.htm
source: pset spaceheatertypecommon.htm
subclass of: Restriction
  on property: hasProperty
  has value: output capacity
subclass of: Restriction
  on property: hasProperty
  has value: thermal efficiency

Duct silencer
source: pset ductsilencertypecommon.htm
subclass of: Restriction
  has value: length
  on property: hasProperty
subclass of: Restriction
  has value: maximum working pressure
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
comment: A duct silencer is a device that is typically installed inside a duct distribution system for the purpose of reducing the noise levels from air movement, fan noise, etc. in the adjacent space or downstream of the duct silencer device.
subclass of: Restriction
  on property: hasProperty
  has value: minimum working pressure
source: ifcductsilencer.htm
subclass of: Flow treatment device
subclass of: Restriction
  on property: hasProperty
  has value: weight
subclass of: Restriction
  has value: air flow rate range min
  on property: hasProperty
type: Class
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: air flow rate range max
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: hydraulic diameter

nominal efficiency
type: Property
comment: Nominal chiller efficiency under nominal conditions.

maximum part load ratio
comment: Maximum part load ratio as a fraction of nominal capacity.
type: Property

imaginary impedance ratio
comment: The ratio between the imaginary part of the zero sequence impedance and the imaginary part of the positive impedance (i.e. imaginary part of the short-circuit voltage) of the transformer. Used for three-phase transformer which includes a N-conductor.
type: Property

access type
comment: Defines the types of access (or cover) to a tank that may be specified. Note that covers are generally specified for rectangular tanks. For cylindrical tanks, access will normally be via a manhole.
type: DatatypeProperty
range: string

outlet temperature range
comment: Allowable outlet temperature of either the water or the steam. Usually measured in degrees Kelvin (K).
type: Property

Transformer
subclass of: Restriction
  on property: hasProperty
  has value: secondary current
subclass of: Restriction
  has value: primary apparent power
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: real impedance ratio
subclass of: Restriction
  on property: hasProperty
  has value: secondary frequency
subclass of: Energy conversion device
subclass of: Restriction
  on property: hasProperty
  has value: primary current
subclass of: Restriction
  has value: secondary voltage
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: maximum apparent power
subclass of: Restriction
  on property: hasProperty
  has value: imaginary impedance ratio
type: Class
source: pset transformertypecommon.htm
subclass of: Restriction
  on property: hasProperty
  has value: primary frequency
subclass of: Restriction
  has value: primary voltage
  on property: hasProperty
comment: A transformer is an inductive stationary device that transfers electrical energy from one circuit to another. Transformer is used to transform electric power; conversion of electric signals for other purposes is handled at other entities: Controller converts arbitrary signals, AudioVisualAppliance converts signals for audio or video streams, and CommunicationsAppliance converts signals for data or other communications usage.
subclass of: Restriction
  has value: secondary apparent power
  on property: hasProperty
source: ifctransformer.htm

frame depth
type: Property
comment: The length (or depth) of the damper frame. Usually measured in millimeters (mm).

nominal flow rate
type: Property
comment: Nominal fluid flow rate through the filter. Usually measured in m3/s.

secondary air flow rate range
comment: Maximum secondary airflow that can be delivered. Usually measured in Pascals (Pa, N/m2).
type: Property

internal refrigerant volume
type: Property
comment: Internal volume of evaporator (refrigerant side). Usually measured in cubic metre (m3).

nominal supply water temperature cooling
comment: Nominal supply water temperature (refers to nominal cooling capacity). Usually measured in degrees Kelvin (K).
type: Property

nominal sorrounding temperature heating
type: Property
comment: Nominal surrounding temperature (refers to nominal heating capacity). Usually measured in degrees Kelvin (K).

pipe connection enum
range: string
type: DatatypeProperty
comment: The manner in which the pipe connection is made to the cooled beam.

nominal condensing temperature
type: Property
comment: Chiller condensing temperature. Usually measured in degrees Kelvin (K).

thermal transmittance
comment: Rate at which energy is transmitted through a body. Usually measured in Watts/m2 Kelvin.
type: Property

primary air flow rate range
type: Property
comment: Minimum primary airflow that can be delivered. Usually measured in m3/s.

application
type: DatatypeProperty
comment: Humidifier application. Fixed: Humidifier installed in a ducted flow distribution system. Portable: Humidifier is not installed in a ducted flow distribution system.
range: string

standard
range: string
comment: The designation of the standard applicable for the definition of the characteristics of the unit.
type: DatatypeProperty

Solar device
type: Class
subclass of: Energy conversion device
source: pset solardevicetypecommon.htm
comment: A solar device converts solar radiation into other energy such as electric current or thermal energy.
source: ifcsolardevicetypeenum.htm

Electric generator
subclass of: Restriction
  has value: maximum power output
  on property: hasProperty
comment: An electric generator is an engine that is a machine for converting mechanical energy into electrical energy.
subclass of: Energy conversion device
subclass of: Restriction
  has value: start current factor
  on property: hasProperty
subclass of: Restriction
  has value: electric generator efficiency
  on property: hasProperty
type: Class
source: pset electricgeneratortypecommon.htm
source: ifcelectricgenerator.htm

nominal media surface velocity
comment: Average fluid velocity at the media surface. Usually measured in m/s.
type: Property

capacity weight
type: Property
comment: Capacity of the transport element measured by weight. Usually measured in kilograms (kg) or grams (g).

Cooling tower
source: pset coolingtowertypecommon.htm
type: Class
subclass of: Restriction
  on property: hasProperty
  has value: nominal capacity
subclass of: Restriction
  has value: water requirement
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: operation temperature range
subclass of: Energy conversion device
subclass of: Restriction
  has value: ambient design wet bulb temperature
  on property: hasProperty
subclass of: Restriction
  has value: basin reserve volume
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: operation temperature range
source: ifccoolingtower.htm
subclass of: Restriction
  has value: lift elevation difference
  on property: hasProperty
comment: A cooling tower is a device which rejects heat to ambient air by circulating a fluid such as water through it to reduce its temperature by partial evaporation.
subclass of: Restriction
  on property: hasProperty
  has value: ambient design dry bulb temperature

Fire suppression terminal
subclass of: Flow terminal
source: pset firesuppressionterminaltypecommon.htm
type: Class
comment: A fire suppression terminal has the purpose of delivering a fluid (gas or liquid) that will suppress a fire. A fire suppression terminal provides for all forms of sprinkler, spreader and other form of terminal that is connected to a pipework system and intended to act in the role of suppressing a fire.
source: ifcfiresuppressionterminal.htm

nominal body depth
type: Property
comment: Nominal or quoted =length, measured along the z-axis of the local coordinate system of the object, of the body of the object. Usually measured in millimeters (mm).

nominal pressure drop
comment: Total pressure drop across the filter. Usually measured in Pascals (Pa, N/m2).
type: Property

output capacity
type: Property
comment: Total nominal heat output as listed by the manufacturer. Usually measured in Watts (W, J/s).

blade action
type: DatatypeProperty
comment: Blade action.
range: string

short circuit voltage
comment: A complex number that specifies the real and imaginary parts of the short-circuit voltage at rated current of a transformer given in %.
type: ObjectProperty

Chiller
subclass of: Restriction
  on property: hasProperty
  has value: nominal power consumption
type: Class
subclass of: Restriction
  has value: nominal capacity
  on property: hasProperty
subclass of: Restriction
  has value: nominal condensing temperature
  on property: hasProperty
subclass of: Energy conversion device
comment: A chiller is a device used to remove heat from a liquid via a vapor-compression or absorption refrigeration cycle to cool a fluid, typically water or a mixture of water and glycol. The chilled fluid is then used to cool and dehumidify air in a building.
subclass of: Restriction
  has value: nominal efficiency
  on property: hasProperty
subclass of: Restriction
  has value: nominal evaporating temmperature
  on property: hasProperty
source: ifcchiller.htm
subclass of: Restriction
  has value: nominal heat rejection rate
  on property: hasProperty
source: pset chillertypecommon.htm

cover length
type: Property
comment: The length measured along the x-axis in the local coordinate system or the radius (in the case of a circular shape in plan) of the cover of the oil interceptor. Usually measured in millimeters (mm).

capacity control
type: DatatypeProperty
range: string
comment: FanCycling: Fan is cycled on and off to control duty. TwoSpeedFan: Fan is switched between low and high speed to control duty. VariableSpeedFan: Fan speed is varied to control duty. DampersControl: Dampers modulate the air flow to control duty. BypassValveControl: Bypass valve modulates the water flow to control duty. MultipleSeriesPumps: Turn on/off multiple series pump to control duty. TwoSpeedPump: Switch between high/low pump speed to control duty. VariableSpeedPump: vary pump speed to control duty.

visible light reflectance
type: Property
comment: Fraction of the visible light that is reflected by the glazing at normal incidence. It is a value without unit.

Controller
comment: A controller is a device that monitors inputs and controls outputs within a building automation system. A controller may be physical (having placement within a spatial structure) or logical (a software interface or aggregated within a programmable physical controller).
type: Class
source: pset controllertypecommon.htm
subclass of: Distribution control device
source: ifccontroller.htm

number of panels
range: integer
type: DatatypeProperty
comment: Number of panels.

Electric flow storage device
comment: An electric flow storage device is a device in which electrical energy is stored and from which energy may be progressively released.
subclass of: Restriction
  has value: nominal supply voltage offset
  on property: hasProperty
type: Class
subclass of: Flow storage device
source: pset electricflowstoragedevicetypecommon.htm
subclass of: Restriction
  on property: hasProperty
  has value: nominal frequency
subclass of: Restriction
  on property: hasProperty
  has value: nominal supply voltage
source: ifcelectricflowstoragedevice.htm

nominal power rate
type: Property
comment: Nominal fan power rate.Usually measured in Watts (W, J/s).

nominal static pressure
type: Property
comment: The static pressure within the air stream that the fan must overcome to insure designed circulation of air. Usually measured in Pascals (Pa, N/m2).

shading device type
comment: Specifies the type of shading device.
type: DatatypeProperty
range: string

real impedance ratio
type: Property
comment: The ratio between the real part of the zero sequence impedance and the real part of the positive impedance (i.e. real part of the short-circuit voltage) of the transformer. Used for three-phase transformer which includes a N-conductor.

evaporation medium type
range: string
comment: ColdLiquid: Evaporator is using liquid type of fluid to exchange heat with refrigerant. ColdAir: Evaporator is using air to exchange heat with refrigerant.
type: DatatypeProperty

number os sockets
type: DatatypeProperty
range: integer
comment: The number of sockets that may be connected. In case of inconsistency, sockets defined on ports take precedence.

has part winding
range: boolean
comment: Indication of whether the motor is single speed, i.e. has a single winding (= FALSE) or multi-speed i.e.has part winding (= TRUE) .
type: DatatypeProperty

fail position
type: DatatypeProperty
comment: Specifies the required fail-safe position of the actuator.
range: string

media source
comment: Indicates media sources and corresponding names of ports (DistributionPort with FlowDirection=SINK and PredefinedType=AUDIOVISUAL) or aggregated audio/video components (AudioVisualAppliance).
range: string
type: DatatypeProperty

finish color
comment: Finish color for cooled beam.
type: DatatypeProperty
range: string

flow arrangement
range: string
comment: CounterFlow: Air and water flow enter in different directions. CrossFlow: Air and water flow are perpendicular. ParallelFlow: air and water flow enter in same directions.
type: DatatypeProperty

valve pattern
comment: The configuration of the ports of a valve according to either the linear route taken by a fluid flowing through the valve or by the number of ports where: SINGLEPORT: Valve that has a single entry port from the system that it serves, the exit port being to the surrounding environment. ANGLED_2_PORT: Valve in which the direction of flow is changed through 90 degrees. STRAIGHT_2_PORT: Valve in which the flow is straight through. STRAIGHT_3_PORT: Valve with three separate ports. CROSSOVER_4_PORT: Valve with 4 separate ports.
range: string
type: DatatypeProperty

energy source
range: string
comment: Enumeration defining the energy source or fuel cumbusted to generate heat.
type: DatatypeProperty
comment: The source of energy.

Tank
type: Class
subclass of: Restriction
  has value: second curvature radius
  on property: hasProperty
subclass of: Restriction
  has value: effective capacity
  on property: hasProperty
subclass of: Restriction
  has value: nominal depth
  on property: hasProperty
subclass of: Restriction
  has value: nominal volumetric capacity
  on property: hasProperty
comment: A tank is a vessel or container in which a fluid or gas is stored for later use.
subclass of: Restriction
  has value: nominal width or diameter
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: operating weight
subclass of: Flow storage device
source: pset tanktypecommon.htm
subclass of: Restriction
  on property: hasProperty
  has value: first curvature radius
source: ifctank.htm
subclass of: Restriction
  on property: hasProperty
  has value: nominal length or diameter

outside diameter
comment: Actual outside diameter of the tube in the tube bundle. Usually measured in millimeters (mm).
type: Property

thermal conductivity
type: Property
comment: Fouling factor of the tubes in the tube bundle. Usually measured in m2 Kelvin/Watt.

Fan
comment: A fan is a device which imparts mechanical work on a gas. A typical usage of a fan is to induce airflow in a building services air distribution system.
type: Class
subclass of: Restriction
  on property: hasProperty
  has value: nominal power rate
subclass of: Restriction
  on property: hasProperty
  has value: nominal rotation speed
subclass of: Restriction
  on property: hasProperty
  has value: nominal air flow rate
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Flow moving device
subclass of: Restriction
  on property: hasProperty
  has value: operational riterial
subclass of: Restriction
  on property: hasProperty
  has value: nominal static pressure
source: pset fantypecommon.htm
subclass of: Restriction
  has value: nominal total pressure
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: operation temperature range
source: ifcfan.htm

Cooled beam
subclass of: Restriction
  on property: hasProperty
  has value: nominal water flow cooling
comment: A cooled beam (or chilled beam) is a device typically used to cool air by circulating a fluid such as chilled water through exposed finned tubes above a space. Typically mounted overhead near or within a ceiling, the cooled beam uses convection to cool the space below it by acting as a heat sink for the naturally rising warm air of the space. Once cooled, the air naturally drops back to the floor where the cycle begins again.
source: ifccooledbeam.htm
subclass of: Restriction
  has value: nominal sorrounding temperature heating
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: nominal water flow heating
subclass of: Restriction
  has value: nominal sorrounding temperature cooling
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: coil length
subclass of: Restriction
  has value: nominal supply water temperature heating
  on property: hasProperty
subclass of: Energy conversion device
source: pset cooledbeamtypecommon.htm
subclass of: Restriction
  has value: nominal supply water temperature cooling
  on property: hasProperty
subclass of: Restriction
  has value: coil width
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: nominal return water temperature cooling
type: Class
subclass of: Restriction
  has value: water pressure range
  on property: hasProperty
subclass of: Restriction
  has value: nominal heating capacity
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: nominal return water temperature heating
subclass of: Restriction
  has value: nominal sorrounding humidity cooling
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: nominal cooling capacity
subclass of: Restriction
  on property: hasProperty
  has value: water pressure range

mechanical operated
range: boolean
comment: Indication whether the element is operated machanically (TRUE) or not, i.e. manually (FALSE).
type: DatatypeProperty

transformer vector group
type: DatatypeProperty
range: string
comment: List of the possible vector groups for the transformer from which that required may be set. Values in the enumeration list follow a standard international code where the first letter describes how the primary windings are connected, the second letter describes how the secondary windings are connected, and the numbers describe the rotation of voltages and currents from the primary to the secondary side in multiples of 30 degrees. D: means that the windings are delta-connected. Y: means that the windings are star-connected. Z: means that the windings are zig-zag connected (a special start-connected providing low reactance of the transformer). The connectivity is only relevant for three-phase transformers.

DistributionFlowDevice
subclass of: Distribution device
comment: Represents devices of a distribution system that facilitate the distribution of energy or matter, such as air, water or power. (Definition adapated from https://standards.buildingsmart.org/IFC/RELEASE/IFC4_1/FINAL/HTML/schema/ifcsharedbldgserviceelements/lexical/ifcdistributionflowelement.htm)
type: Class

initial resistance
comment: Initial new filter fluid resistance (i.e., pressure drop at the maximum air flowrate across the filter when the filter is new per ASHRAE Standard 52.1). Usually measured in Pascals (Pa, N/m2).
type: Property

operational riterial
type: Property
comment: Time of operation at maximum operational ambient air temperature. Measured in seconds (s) or days (d) or other units of time.

Heat exchanger
source: pset heatexchangertypecommon.htm
subclass of: Energy conversion device
comment: A heat exchanger is a device used to provide heat transfer between non-mixing media such as plate and shell and tube heat exchangers. HeatExchanger is commonly used on water-side distribution systems to recover energy from a liquid to another liquid (typically water-based), whereas AirToAirHeatRecovery is commonly used on air-side distribution systems to recover energy from a gas to a gas (usually air).
type: Class
source: ifcheatexchanger.htm

net positive suction head
type: Property
comment: Minimum liquid pressure at the pump inlet to prevent cavitation. Usually measured in Pascals (Pa, N/m2).

nominal heating capacity
comment: Nominal heating capacity. Usually measured in Watts (W, J/s).
type: Property

Pump
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
comment: A pump is a device which imparts mechanical work on fluids or slurries to move them through a channel or pipeline. A typical use of a pump is to circulate chilled water or heating hot water in a building services distribution system.
type: Class
subclass of: Restriction
  has value: net positive suction head
  on property: hasProperty
subclass of: Restriction
  has value: flow resistance range
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: flow resistance range
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
source: ifcpump.htm
subclass of: Restriction
  has value: pump flow rate range
  on property: hasProperty
subclass of: Restriction
  has value: nomminal rotation speed
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: connection size
source: pset pumptypecommon.htm
subclass of: Restriction
  on property: hasProperty
  has value: pump flow rate range
subclass of: Flow moving device

Flow treatment device
source: ifcflowtreatmentdevice.htm
type: Class
comment: The distribution flow element FlowTreatmentDevice defines the occurrence of a device typically used to remove unwanted matter from a fluid, either liquid or gas, and typically participates in a flow distribution system.
subclass of: DistributionFlowDevice

is free hanging
type: DatatypeProperty
range: boolean
comment: Is it free hanging type (not mounted in a false ceiling)?

nominal supply voltage offset
comment: The maximum and minimum allowed voltage of the supply e.g. boundaries of 380V/440V may be applied for a nominal voltage of 400V.
type: Property

lamp ballast type
range: string
comment: The type of ballast used to stabilise gas discharge by limiting the current during operation and to deliver the necessary striking voltage for starting. Ballasts are needed to operate Discharge Lamps such as Fluorescent, Compact Fluorescent, High-pressure Mercury, Metal Halide and High-pressure Sodium Lamps. Magnetic ballasts are chokes which limit the current passing through a lamp connected in series on the principle of self-induction. The resultant current and power are decisive for the efficient operation of the lamp. A specially designed ballast is required for every type of lamp to comply with lamp rating in terms of Luminous Flux, Color Appearance and service life. The two types of magnetic ballasts for fluorescent lamps are KVG Conventional (EC-A series) and VVG Low-loss ballasts (EC-B series). Low-loss ballasts have a higher efficiency, which means reduced ballast losses and a lower thermal load. Electronic ballasts are used to run fluorescent lamps at high frequencies (approx. 35 - 40 kHz).
type: DatatypeProperty

coil length
comment: Length of coil. Usually measured in millimeters (mm).
type: Property

Protective device tripping unit
subclass of: Restriction
  has value: limiting terminal size
  on property: hasProperty
type: Class
subclass of: Distribution control device
source: ifcprotectivedevicetrippingunit.htm
comment: A protective device tripping unit breaks an electrical circuit at a separate breaking unit when a stated electric current that passes through the unit is exceeded.
source: pset protectivedevicetrippingunittypecommon.htm

nominal ua
type: Property
comment: Nominal UA value.

secondary current type
range: string
comment: A list of the secondary current types that can result from transformer output.
type: DatatypeProperty

second curvature radius
type: Property
comment: SecondCurvatureRadius should be defined as the top or right side radius of curvature value. Usually measured in millimeters (mm).

Tube bundle
subclass of: Restriction
  on property: hasProperty
  has value: horizontal spacing
subclass of: Restriction
  has value: volumen
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: nominal diameter
subclass of: Restriction
  on property: hasProperty
  has value: thermal conductivity
source: pset tubebundletypecommon.htm
subclass of: Energy conversion device
subclass of: Restriction
  has value: length
  on property: hasProperty
subclass of: Restriction
  has value: inside diameter
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: outside diameter
subclass of: Restriction
  has value: in line row spacing
  on property: hasProperty
type: Class
subclass of: Restriction
  has value: staggered row spacing
  on property: hasProperty
subclass of: Restriction
  has value: vertical spacing
  on property: hasProperty
subclass of: Restriction
  has value: fouling factor
  on property: hasProperty
source: ifctubebundle.htm
comment: A tube bundle is a device consisting of tubes and bundles of tubes used for heat transfer and contained typically within other energy conversion devices, such as a chiller or coil.

ventilating pipe size
comment: Size of the ventilating pipe(s). Usually measured in millimeters (mm).
type: Property

ideal shaft power
comment: Compressor shaft power under ideal conditions. Usually measured in Watts (W, J/s).
type: Property

face area
comment: Face area open to the airstream. Usually measured in square metre (m2).
type: Property

Outlet
source: ifcoutlet.htm
subclass of: Flow terminal
type: Class
comment: An outlet is a device installed at a point to receive one or more inserted plugs for electrical power or communications. Power outlets are commonly connected within a junction box; data outlets may be directly connected to a wall. For power outlets sharing the same circuit within a junction box, the ports should indicate the logical wiring relationship to the enclosing junction box, even though they may be physically connected to a cable going to another outlet, switch, or fixture.
source: pset outlettypecommon.htm

Protective device
type: Class
source: pset protectivedevicetypecommon.htm
source: ifcprotectivedevice.htm
subclass of: Flow controller
comment: A protective device breaks an electrical circuit when a stated electric current that passes through it is exceeded. A protective device provides protection against electrical current only (not as a general protective device). It may be used to represent the complete set of elements including both the tripping unit and the breaking unit that provide the protection. This may be particularly useful at earlier stages of design where the approach to breaking the electrical supply may be determined but the method of tripping may not. Alternatively, this entity may be used to specifically represent the breaking unit alone (in which case the tripping unit will also be specifically identified). This entity is specific to dedicated protective devices and excludes electrical outlets that may have circuit protection.

Condenser
subclass of: Restriction
  has value: nominal heat transfer area
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: nominal heat transfer coefficient
source: ifccondenser.htm
comment: A condenser is a device that is used to dissipate heat, typically by condensing a substance such as a refrigerant from its gaseous to its liquid state.
subclass of: Energy conversion device
source: pset condensertypecommon.htm
subclass of: Restriction
  on property: hasProperty
  has value: internal surface area
subclass of: Restriction
  has value: internal refrigerant volume
  on property: hasProperty
type: Class
subclass of: Restriction
  on property: hasProperty
  has value: external surface area
subclass of: Restriction
  on property: hasProperty
  has value: internal water volume

number of gangs
range: integer
type: DatatypeProperty
comment: Number of gangs/buttons on this switch.

isolator static deflection
comment: Static deflection of the vibration isolator. Usually measured in millimeters (mm).
type: Property

fire exit
comment: Indication whether this object is designed to serve as an exit in the case of fire (TRUE) or not (FALSE). Here whether the transport element (in case of e.g., a lift) is designed to serve as a fire exit, e.g., for fire escape purposes.
type: DatatypeProperty
range: boolean

maximum power output
type: Property
comment: The maximum output power rating of the engine. Usually measured in Watts (W, J/s).

nominal return water temperature heating
type: Property
comment: Nominal return water temperature (refers to nominal heating capacity). Usually measured in degrees Kelvin (K).

Filter
subclass of: Restriction
  on property: hasProperty
  has value: nominal media surface velocity
source: ifcfilter.htm
subclass of: Restriction
  on property: hasProperty
  has value: final resistance
subclass of: Restriction
  on property: hasProperty
  has value: nominal pressure drop
subclass of: Restriction
  has value: fluid flow rate range
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: nominal particle geometric standard deviation
subclass of: Restriction
  has value: fluid flow rate range
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: nominal flow rate
subclass of: Restriction
  on property: hasProperty
  has value: nominal filter face velocity
source: pset filtertypecommon.htm
subclass of: Restriction
  has value: nominal particle geometric mean diameter
  on property: hasProperty
comment: A filter is an apparatus used to remove particulate or gaseous matter from fluids and gases.
type: Class
subclass of: Restriction
  on property: hasProperty
  has value: weight
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: operation temperature range
subclass of: Restriction
  has value: initial resistance
  on property: hasProperty
subclass of: Flow treatment device

audio volume
type: Property
comment: Indicates discrete audio volume levels and corresponding sound power offsets, if applicable. Missing values may be interpolated. Measured in watts.

Medical device
subclass of: Flow terminal
comment: A medical device is attached to a medical piping system and operates upon medical gases to perform a specific function. Medical gases include medical air, medical vacuum, oxygen, carbon dioxide, nitrogen, and nitrous oxide.
source: pset medicaldevicetypecommon.htm
type: Class
source: ifcmedicaldevice.htm

primary frequency
comment: The frequency that is going to be transformed and that runs into the transformer on the primary side. Usually measured in cycles/s or Hertz (Hz).
type: Property

nominal cooling capacity
comment: Nominal cooling capacity. Usually measured in Watts (W, J/s).
type: Property

Burner
source: pset burnertypecommon.htm
subclass of: Energy conversion device
comment: A burner is a device that converts fuel into heat through combustion. It includes gas, oil, and wood burners.
type: Class
source: ifcburner.htm

circuit type
comment: OpenCircuit: Exposes water directly to the cooling atmosphere. CloseCircuit: The fluid is separated from the atmosphere by a heat exchanger. Wet: The air stream or the heat exchange surface is evaporatively cooled. Dry: No evaporation into the air stream. DryWet: A combination of a dry tower and a wet tower.
range: string
type: DatatypeProperty

storage type
range: string
type: DatatypeProperty
comment: Defines the general material category intended to be stored.

te time
comment: The maximum time (in s) at which the motor could run with locked rotor when the motor is used in an EX-environment. The time indicates that a protective device should trip before this time when the starting current of the motor is slowing through the device.
type: Property

number of blades
type: DatatypeProperty
range: integer
comment: Number of blades.

color appearance
type: DatatypeProperty
comment: In both the DIN and CIE standards, artificial light sources are classified in terms of their color appearance. To the human eye they all appear to be white the difference can only be detected by direct comparison. Visual performance is not directly affected by differences in color appearance.
range: string

is guarded
comment: Indication of whether the motor enclosure is guarded (= TRUE) or not (= FALSE).
type: DatatypeProperty
range: boolean

Sensor
subclass of: Sensor
type: Class
comment: A sensor is a device that measures a physical quantity and converts it into a signal which can be read by an observer or by an instrument.
source: pset sensortypecommon.htm
source: ifcsensor.htm
subclass of: Distribution control device

primary air flow rate range
type: Property
comment: Maximum primary airflow that can be delivered. Usually measured in m3/s.

read out type
range: string
type: DatatypeProperty
comment: Indication of the form that readout from the meter takes. In the case of a dial read out, this may comprise multiple dials that give a cumulative reading and/or a mechanical odometer.

Evaporator
subclass of: Restriction
  has value: nominal heat transfer area
  on property: hasProperty
source: pset evaporatortypecommon.htm
source: ifcevaporator.htm
comment: An evaporator is a device in which a liquid refrigerent is vaporized and absorbs heat from the surrounding fluid.
subclass of: Restriction
  has value: internal refrigerant volume
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: nominal heat transfer coefficient
type: Class
subclass of: Restriction
  on property: hasProperty
  has value: internal surface area
subclass of: Restriction
  on property: hasProperty
  has value: internal water volume
subclass of: Restriction
  has value: external surface area
  on property: hasProperty
subclass of: Energy conversion device

refrigerant class
type: DatatypeProperty
comment: Refrigerant class used by the compressor. CFC: Chlorofluorocarbons. HCFC: Hydrochlorofluorocarbons. HFC: Hydrofluorocarbons.
range: string

Electric appliance
source: ifcelectricappliance.htm
source: pset electricappliancetypecommon.htm
subclass of: Flow terminal
comment: An electric appliance is a device intended for consumer usage that is powered by electricity. Electric appliances may be fixed in place or may be able to be moved from one space to another. Electric appliances require an electrical supply that may be supplied either by an electrical circuit or provided from a local battery source.
type: Class

nominal depth
comment: The nominal depth of the tank. Note: Not required for a horizontal cylindrical tank. Usually measured in millimeters (mm).
type: Property

nominal air flow rate
type: Property
comment: Nominal rate of air flow. Usually measured in m3/s.

number of sections
comment: Number of sections used.
range: integer
type: DatatypeProperty

Engine
source: pset enginetypecommon.htm
type: Class
subclass of: Energy conversion device
source: ifcengine.htm
comment: An engine is a device that converts fuel into mechanical energy through combustion.

lamp compensation type
comment: Identifies the form of compensation used for power factor correction and radio suppression.
range: string
type: DatatypeProperty

nominal particle geometric mean diameter
type: Property
comment: Particle geometric mean diameter associated with nominal efficiency. Usually measured in millimeters (mm).

test pressure
comment: The maximum pressure to which the valve has been subjected under test. Usually measured in Pascals (Pa, N/m2).
type: Property

Flow storage device
type: Class
source: ifcflowstoragedevice.htm
subclass of: DistributionFlowDevice
comment: The distribution flow element FlowStorageDevice defines the occurrence of a device that participates in a distribution system and is used for temporary storage (such as a tank).

primary voltage
type: Property
comment: The voltage that is going to be transformed and that runs into the transformer on the primary side. Usually measured in Volts (V, W/A).

Flow instrument
comment: A flow instrument reads and displays the value of a particular property of a system at a point, or displays the difference in the value of a property between two points. Instrumentation is typically for the purpose of determining the value of the property at a point in time. It is not the purpose of an instrument to record or integrate the values over time (although they may be connected to recording devices that do perform such a function). This entity provides for all forms of mechanical flow instrument (thermometers, pressure gauges etc.) and electrical flow instruments (ammeters, voltmeters etc.)
type: Class
subclass of: Distribution control device
source: pset flowinstrumenttypecommon.htm
source: ifcflowinstrument.htm

arrangement
type: DatatypeProperty
comment: Defines the basic flow arrangements for the heat exchanger: COUNTERFLOW: Counterflow heat exchanger arrangement. CROSSFLOW: Crossflow heat exchanger arrangement. PARALLELFLOW: Parallel flow heat exchanger arrangement. MULTIPASS: Multipass flow heat exchanger arrangement. OTHER: Other type of heat exchanger flow arrangement not defined above.
range: string

Sanitary terminal
subclass of: Flow terminal
type: Class
source: pset sanitaryterminaltypecommon.htm
comment: A sanitary terminal is a fixed appliance or terminal usually supplied with water and used for drinking, cleaning or foul water disposal or that is an item of equipment directly used with such an appliance or terminal.
source: ifcsanitaryterminal.htm

nominal width or diameter
type: Property
comment: The nominal width or, in the case of a horizontal cylindrical tank, the nominal diameter of the tank. Note: Not required for a vertical cylindrical tank. Usually measured in millimeters (mm).

final resistance
type: Property
comment: Filter fluid resistance when replacement is required (i.e., Pressure drop at the maximum air flowrate across the filter when the filter needs replacement per ASHRAE Standard 52.1). Usually measured in Pascals (Pa, N/m2).

coil width
type: Property
comment: Width of coil. Usually measured in millimeters (mm

close off rating
comment: Close off rating. Usually measured in Pascals (Pa, N/m2).
type: Property

has defrost
type: DatatypeProperty
comment: Whether the heat exchanger has defrost function or not.
range: boolean

Building device
subclass of: Building object
type: Class
comment: A tangible object designed to accomplish a particular task in a building.
subclass of: Device

nominal total pressure
type: Property
comment: Nominal total pressure rise across the fan. Usually measured in Pascals (Pa, N/m2).

integrated lighting type
range: string
comment: Integrated lighting in cooled beam.
type: DatatypeProperty

minimum spectrum
comment: The spectrum of radiation describes its composition with regard to wavelength. Light, for example, as the portion of electromagnetic radiation that is visible to the human eye, is radiation with wavelengths in the range of approx. 380 to 780 nm (1 nm = 10 m). The corresponding range of colours varies from violet to indigo, blue, green, yellow, orange, and red. These colours form a continuous spectrum, in which the various spectral sectors merge into each other.
type: Property

cover width
type: Property
comment: The length measured along the x-axis in the local coordinate system of the cover of the oil interceptor. Usually measured in millimeters (mm).

secondary voltage
comment: The voltage that has been transformed and is running out of the transformer on the secondary side. Usually measured in Volts (V, W/A).
type: Property

nominal power consumption
comment: Nominal total power consumption. Usually measured in Watts (W, J/s).
type: Property

Compressor
subclass of: Restriction
  on property: hasProperty
  has value: maximum part load ratio
type: Class
comment: A compressor is a device that compresses a fluid typically used in a refrigeration circuit.
subclass of: Restriction
  on property: hasProperty
  has value: impeller diameter
source: ifccompressor.htm
subclass of: Restriction
  has value: compressor speed
  on property: hasProperty
source: pset compressortypecommon.htm
subclass of: Restriction
  has value: nominal capacity
  on property: hasProperty
subclass of: Restriction
  has value: ideal capacity
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: minimum part load ratio
subclass of: Flow moving device
subclass of: Restriction
  on property: hasProperty
  has value: ideal shaft power

electric generator efficiency
type: Property
comment: The ratio of output capacity to intake capacity.

vibration transmissibility
type: Property
comment: The vibration transmissibility percentage.

is water storage heater
range: boolean
type: DatatypeProperty
comment: This is used to identify if the boiler has storage capacity (TRUE). If FALSE, then there is no storage capacity built into the boiler, such as an instantaneous hot water heater.

maximum supported weight
comment: The maximum weight that can be carried by the vibration isolator. Usually measured in kilograms (kg) or grams (g).
type: Property

roughness
type: DatatypeProperty
comment: A measure of the vertical deviations of the surface.
range: string

visible light transmittance
type: Property
comment: Fraction of the visible light that passes the shading system at normal incidence. It is a value without unit.

motor drive type
range: string
type: DatatypeProperty
comment: Motor drive type: DIRECTDRIVE: Direct drive. BELTDRIVE: Belt drive. COUPLING: Coupling. OTHER: Other type of motor drive. UNKNOWN: Unknown motor drive type.

external surface area
comment: External surface area (both primary and secondary area). Usually measured in square metre (m2).
type: Property

control strategy
comment: FixedExitingWaterTemp: The capacity is controlled to maintain a fixed exiting water temperature. WetBulbTempReset: The set-point is reset based on the wet-bulb temperature.
type: DatatypeProperty
range: string

ambient design dry bulb temperature
comment: Ambient design dry bulb temperature used for selecting the cooling tower. Usually measured in degrees Kelvin (K).
type: Property

orientation
type: DatatypeProperty
comment: The intended orientation for the damper as specified by the manufacturer.
range: string

light emitter nominal power
type: Property
comment: Light emitter nominal power. Usually measured in Watts (W, J/s).

isSpaceOf
type: ObjectProperty
type: TransitiveProperty
comment: Relation between a building space and the building or building space it belongs to.
inverse of: has space

staggered row spacing
type: Property
comment: Staggered tube row spacing. Usually measured in millimeters (mm).

number of cells
comment: Number of cells in one cooling tower unit.
range: integer
type: DatatypeProperty

nominal body length
type: Property
comment: Nominal or quoted length, measured along the x-axis of the local coordinate system of the object, of the body of the object. Usually measured in millimeters (mm).

Distribution control device
comment: Represents devices of a building automation control system that are used to impart control over elements of a distribution system. (Definition adapated from https://standards.buildingsmart.org/IFC/RELEASE/IFC4_1/FINAL/HTML/schema/ifcsharedbldgserviceelements/lexical/ifcdistributioncontrolelement.htm)
subclass of: Distribution device
type: Class

flow resistance range
type: Property
comment: Allowable range of frictional resistance against which the fluid is being pumped. Usually measured in Pascals (Pa, N/m2).

Building object
subclass of: Physical object
comment: An object in the building that can be controlled by devices, such as a door or a window that can be automatically opened or closed by an actuator. (Definition taken from SAREF 1.0)
type: Class

nominal particle geometric standard deviation
type: Property
comment: Particle geometric standard deviation associated with nominal efficiency.

is pluggable outlet
type: DatatypeProperty
range: boolean
comment: Indication of whether the outlet accepts a loose plug connection (= TRUE) or whether it is directly connected (= FALSE) or whether the form of connection has not yet been determined (= UNKNOWN).

power source
comment: Type of power driving the compressor.
range: string
type: DatatypeProperty

flow resistance range
type: Property
comment: Allowable range of frictional resistance against which the fluid is being pumped. Usually measured in Pascals (Pa, N/m2).

heat transfer surface area
type: Property
comment: Total heat transfer area of the vessel. Usually measured in square metre (m2).

capacity control type
range: string
type: DatatypeProperty
comment: InletVane: Control by adjusting inlet vane. VariableSpeedDrive: Control by variable speed drive. BladePitchAngle: Control by adjusting blade pitch angle. TwoSpeed: Control by switch between high and low speed. DischargeDamper: Control by modulating discharge damper.

primary current
type: Property
comment: The current that is going to be transformed and that runs into the transformer on the primary side. Usually measured in Ampere (A).

is illuminated
type: DatatypeProperty
range: boolean
comment: An indication of whether there is an illuminated indicator to show that the switch is on (=TRUE) or not (= FALSE).

thermal mass heat capacity
comment: Product of component mass and specific heat.
type: Property

secondary air flow rate range
comment: Maximum secondary airflow that can be delivered. Usually measured in Pascals (Pa, N/m2).
type: Property

Electric motor
subclass of: Energy conversion device
subclass of: Restriction
  on property: hasProperty
  has value: locked rotor current
source: ifcelectricmotor.htm
subclass of: Restriction
  on property: hasProperty
  has value: electric motor efficiency
subclass of: Restriction
  on property: hasProperty
  has value: te time
subclass of: Restriction
  has value: starting time
  on property: hasProperty
comment: An electric motor is an engine that is a machine for converting electrical energy into mechanical energy.
type: Class
subclass of: Restriction
  on property: hasProperty
  has value: start current factor
source: pset electricmotortypecommon.htm
subclass of: Restriction
  on property: hasProperty
  has value: maximum power output

Physical object
subclass of: Restriction
  on property: contains
  all values from: Physical object
type: Class
subclass of: Restriction
  on property: is contained in
  all values from: Class
    union of: Building space
    union of: Physical object
comment: Any Object that has a proper space region. (Definition extracted from DUL ontology)
subclass of: SpatialThing

Alarm
source: pset alarmtypecommon.htm
source: ifcalarm.htm
type: Class
comment: An alarm is a device that signals the existence of a condition or situation that is outside the boundaries of normal expectation or that activates such a device. Alarms include the provision of break glass buttons and manual pull boxes that are used to activate alarms.
subclass of: Distribution control device

nominal capacity
type: Property
comment: Nominal capacity. Usually measured in Watts (W, J/s).

length
comment: The finished length of the device. Usually measured in millimeters (mm).
type: Property

electric motor efficiency
type: Property
comment: The ratio of output capacity to intake capacity.

Switching device
source: ifcswitchingdevice.htm
subclass of: Flow controller
source: pset switchingdevicetypecommon.htm
comment: A switch is used in a cable distribution system (electrical circuit) to control or modulate the flow of electricity. Switches include those used for electrical power, communications, audio-visual, or other distribution system types as determined by the available ports.
type: Class

Vibration isolator
subclass of: Restriction
  on property: hasProperty
  has value: isolator compressibility
subclass of: Restriction
  on property: hasProperty
  has value: height
source: ifcvibrationisolator.htm
subclass of: Restriction
  on property: hasProperty
  has value: maximum supported weight
comment: A vibration isolator is a device used to minimize the effects of vibration transmissibility in a building.
subclass of: Restriction
  has value: isolator static deflection
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: vibration transmissibility
subclass of: Device
source: pset vibrationisolatortypecommon.htm
type: Class

blade thickness
comment: The thickness of the damper blade. Usually measured in millimeters (mm).
type: Property

Coil
subclass of: Energy conversion device
comment: A coil is a device used to provide heat transfer between non-mixing media. A common example is a cooling coil, which utilizes a finned coil in which circulates chilled water, antifreeze, or refrigerant that is used to remove heat from air moving across the surface of the coil. A coil may be used either for heating or cooling purposes by placing a series of tubes (the coil) carrying a heating or cooling fluid into an airstream. The coil may be constructed from tubes bundled in a serpentine form or from finned tubes that give a extended heat transfer surface. Coils may also be used for non-airflow cases such as embedded in a floor slab.
source: ifccoil.htm
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: nominal ua
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: air flow rate range min
subclass of: Restriction
  on property: hasProperty
  has value: nominal sensible capacity
subclass of: Restriction
  has value: nominal latent capacity
  on property: hasProperty
type: Class
source: pset coiltypecommon.htm
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: air flow rate range max
  on property: hasProperty

contributed luminous flux
type: Property
comment: Luminous flux is a photometric measure of radiant flux, i.e. the volume of light emitted from a light source. Luminous flux is measured either for the interior as a whole or for a part of the interior (partial luminous flux for a solid angle). All other photometric parameters are derivatives of luminous flux. Luminous flux is measured in lumens (lm). The luminous flux is given as a nominal value for each lamp. Usually measured in Lumen (lm, Candela Steradian).

primary apparent power
type: Property
comment: The power in VA (volt ampere) that has been transformed and that runs into the transformer on the primary side. Usually measured in Watts (W, J/s).

frame type
comment: The type of frame used by the damper (e.g., Standard, Single Flange, Single Reversed Flange, Double Flange, etc.).
type: DatatypeProperty
range: string

valve operation
range: string
comment: The method of valve operation where: DROPWEIGHT: A valve that is closed by the action of a weighted lever being released, the weight normally being prevented from dropping by being held by a wire, the closure normally being made by the action of heat on a fusible link in the wire FLOAT: A valve that is opened and closed by the action of a float that rises and falls with water level. The float may be a ball attached to a lever or other mechanism HYDRAULIC: A valve that is opened and closed by hydraulic actuation LEVER: A valve that is opened and closed by the action of a lever rotating the gate within the valve. LOCKSHIELD: A valve that requires the use of a special lockshield key for opening and closing, the operating mechanism being protected by a shroud during normal operation. MOTORIZED: A valve that is opened and closed by the action of an electric motor on an actuator PNEUMATIC: A valve that is opened and closed by pneumatic actuation SOLENOID: A valve that is normally held open by a magnetic field in a coil acting on the gate but that is closed immediately if the electrical current generating the magnetic field is removed. SPRING: A valve that is normally held in position by the pressure of a spring on a plate but that may be caused to open if the pressure of the fluid is sufficient to overcome the spring pressure. THERMOSTATIC: A valve in which the ports are opened or closed to maintain a required predetermined temperature. WHEEL: A valve that is opened and closed by the action of a wheel moving the gate within the valve.
type: DatatypeProperty

has turbulator
comment: TRUE if the tube has a turbulator, FALSE if it does not.
type: DatatypeProperty
range: boolean

Transport element
source: ifctransportelement.htm
comment: A transport element is a generalization of all transport related objects that move people, animals or goods within a building or building complex. The TransportElement defines the occurrence of a transport element.
type: Class
source: pset transportelementcommon.htm
subclass of: Restriction
  has value: capacity weight
  on property: hasProperty
subclass of: Restriction
  all values from: positiveInteger
  on property: capacity people
subclass of: Device

spray type
comment: SprayFilled: Water is sprayed into airflow. SplashTypeFill: water cascades over successive rows of splash bars. FilmTypeFill: water flows in a thin layer over closely spaced sheets.
range: string
type: DatatypeProperty

maximum apparent power
comment: Maximum apparent power/capacity in VA (volt ampere). Usually measured in Watts (W, J/s).
type: Property

leakage fully closed
type: Property
comment: Leakage when fully closed. Usually measured in m3/s.

fluid flow rate range
type: Property
comment: Possible range of fluid flowrate that can be delivered. Usually measured in m3/s.

connection size
comment: The connection size of the to and from the pump. Usually measured in millimeters (mm).
type: Property

Lamp
subclass of: Restriction
  on property: hasProperty
  has value: light emitter nominal power
subclass of: Restriction
  has value: contributed luminous flux
  on property: hasProperty
comment: A lamp is an artificial light source such as a light bulb or tube.
source: ifclamp.htm
subclass of: Restriction
  on property: hasProperty
  has value: color temperature
source: pset lamptypecommon.htm
subclass of: Restriction
  has value: maximum spectrum
  on property: hasProperty
subclass of: Flow terminal
subclass of: Restriction
  has value: lamp maintenance factor
  on property: hasProperty
type: Class
subclass of: Restriction
  on property: hasProperty
  has value: minimum spectrum

nominal energy consumption
comment: Nominal fuel consumption rate required to produce the total boiler heat output. Usually measured in Watts (W, J/s).
type: Property

thermal efficiency
comment: Overall Thermal Efficiency is defined as gross energy output of the heat transfer device divided by the energy input.
type: Property

legend
range: string
type: DatatypeProperty
comment: A text inscribed or applied to the switch as a legend to indicate purpose or function.

end shape type
comment: Defines the types of end shapes that can be used for preformed tanks. The convention for reading these enumerated values is that for a vertical cylinder, the first value is the base and the second is the top for a horizontal cylinder, the order of reading should be left to right. For a speherical tank, the value UNSET should be used.B5
range: string
type: DatatypeProperty

is neutral primary terminal available
comment: An indication of whether the neutral point of the primary winding is available as a terminal (=TRUE) or not (= FALSE).
type: DatatypeProperty
range: boolean

temperature rating
type: Property
comment: Temperature rating. Usually measured in degrees Kelvin (K).

starting time
type: Property
comment: The time (in s) needed for the motor to reach its rated speed with its driven equipment attached, starting from standstill and at the nominal voltage applied at its terminals.

fouling factor
comment: Fouling factor of the tubes in the tube bundle. Usually measured in m2 Kelvin/Watt.
type: Property

nominal water flow heating
type: Property
comment: Nominal water flow (refers to nominal heating capacity). Usually measured in m3/s.

outlet temperature range
comment: Allowable outlet temperature of either the water or the steam. Usually measured in degrees Kelvin (K).
type: Property

internal water volume
comment: Internal volume of evaporator (water side). Usually measured in cubic metre (m3).
type: Property

locked rotor current
type: Property
comment: Input current when a motor armature is energized but not rotating. Usually measured in Ampere (A).

Actuator
type: Class
source: ifcactuator.htm
subclass of: Actuator
subclass of: Distribution control device
source: pset actuatortypecommon.htm
comment: An actuator is a mechanical device for moving or controlling a mechanism or system. An actuator takes energy, usually created by air, electricity, or liquid, and converts that into some kind of motion.

operation temperature range
comment: Allowable operation ambient (air, fluid) temperature range. Usually measured in degrees Kelvin (K).
type: Property

Flow terminal
type: Class
subclass of: DistributionFlowDevice
comment: The distribution flow element FlowTerminal defines the occurrence of a permanently attached element that acts as a terminus or beginning of a distribution system (such as an air outlet, drain, water closet, or sink). A terminal is typically a point at which a system interfaces with an external environment.
source: ifcflowterminal.htm

remote reading
comment: Indicates whether the meter has a connection for remote reading through connection of a communication device (set TRUE) or not (set FALSE).
type: DatatypeProperty
range: boolean

lift elevation difference
type: Property
comment: Elevation difference between cooling tower sump and the top of the tower. Usually measured in millimeters (mm).

Communication appliance
subclass of: Flow terminal
type: Class
source: pset communicationsappliancetypecommon.htm
comment: A communications appliance transmits and receives electronic or digital information as data or sound. Communication appliances may be fixed in place or may be able to be moved from one space to another. Communication appliances require an electrical supply that may be supplied either by an electrical circuit or provided from a local battery source.
source: ifccommunicationsappliance.htm

valve mechanism
range: string
comment: The mechanism by which the valve function is achieved where: BALL: Valve that has a ported ball that can be turned relative to the body seat ports. BUTTERFLY: Valve in which a streamlined disc pivots about a diametric axis. CONFIGUREDGATE: Screwdown valve in which the closing gate is shaped in a configured manner to have a more precise control of pressure and flow change across the valve. GLAND: Valve with a tapered seating, in which a rotatable plug is retained by means of a gland and gland packing. GLOBE: Screwdown valve that has a spherical body. LUBRICATEDPLUG: Plug valve in which a lubricant is injected under pressure between the plug face and the body. NEEDLE: Valve for regulating the flow in or from a pipe, in which a slender cone moves along the axis of flow to close against a fixed conical seat. PARALLELSLIDE: Screwdown valve that has a machined plate that slides in formed grooves to form a seal. PLUG: Valve that has a ported plug that can be turned relative to the body seat ports. WEDGEGATE: Screwdown valve that has a wedge shaped plate fitting into tapered guides to form a seal.
type: DatatypeProperty

minimum part load ratio
type: Property
comment: Minimum part load ratio as a fraction of nominal capacity.

nominal volumetric capacity
type: Property
comment: The total nominal or design volumetric capacity of the tank. Usually measured in cubic metre (m3).

effective capacity
comment: The total effective or actual volumetric capacity of the tank. Usually measured in cubic metre (m3).B3
type: Property

Unitary control element
source: pset unitarycontrolelementtypecommon.htm
comment: A unitary control element combines a number of control components into a single product, such as a thermostat or humidistat. A unitary control element provides a housing for an aggregation of control or electrical distribution elements that, in combination, perform a singular (unitary) purpose. Each item in the aggregation may have its own geometric representation and location.
type: Class
subclass of: Distribution control device
source: ifcunitarycontrolelement.htm

contains
range: Physical object
domain: Physical object
type: ObjectProperty
comment: A relation between a physical object and another physical object it contains.
inverse of: is contained in
type: TransitiveProperty

Evaporative cooler
source: pset evaporativecoolertypecommon.htm
type: Class
subclass of: Energy conversion device
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  on property: hasProperty
  has value: heat exchange area
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
comment: An evaporative cooler is a device that cools air by saturating it with water vapor.
subclass of: Restriction
  has value: water requirement
  on property: hasProperty
source: ifcevaporativecooler.htm

heat transfer dimension
range: string
comment: Indicates how heat is transmitted according to the shape of the space heater.
type: DatatypeProperty

nominal return water temperature cooling
type: Property
comment: Nominal return water temperature (refers to nominal cooling capacity). Usually measured in degrees Kelvin (K).

color rendering index
range: integer
comment: The CRI indicates how well a light source renders eight standard colors compared to perfect reference lamp with the same color temperature. The CRI scale ranges from 1 to 100, with 100 representing perfect rendering properties.
type: DatatypeProperty

solar transmittance
comment: (Tsol) The ratio of incident solar radiation that directly passes through a shading system (also named _e). Note the following equation Asol + Rsol + Tsol = 1
type: Property

isolator compressibility
comment: The compressibility of the vibration isolator.
type: Property

impeller diameter
type: Property
comment: Diameter of compressor impeller - used to scale performance of geometrically similar compressors. Usually measured in millimeters (mm).

water inlet temperature range
type: Property
comment: Allowable water inlet temperature range. Usually measured in degrees Kelvin (K).

vertical spacing
type: Property
comment: Vertical spacing between tubes in the tube bundle.Usually measured in millimeters (mm).

secondary apparent power
comment: The power in VA (volt ampere) that has been transformed and is running out of the transformer on the secondary side. Usually measured in Watts (W, J/s).
type: Property

Distribution device
subclass of: Building device
comment: Generalization of all devices that participate in a distribution system. (Definition adapated from https://standards.buildingsmart.org/IFC/RELEASE/IFC4_1/FINAL/HTML/schema/ifcproductextension/lexical/ifcdistributionelement.htm)
type: Class

nominal supply voltage
type: Property
comment: The nominal voltage of the supply. Usually measured in Volts (V, W/A).

air flow rate range min
type: Property
comment: Minimum allowable air flow rate. Usually measured in m3/s.

Flow controller
type: Class
source: ifcflowcontroller.htm
comment: The distribution flow element FlowController defines the occurrence of elements of a distribution system that are used to regulate flow through a distribution system. Examples include dampers, valves, switches, and relays.
subclass of: DistributionFlowDevice

working pressure
type: Property
comment: The normally expected maximum working pressure of the valve. Usually measured in Pascals (Pa, N/m2).

evaporation coolant
range: string
type: DatatypeProperty
comment: The fluid used for the coolant in the evaporator.

hydraulic diameter
type: Property
comment: Hydraulic diameter. Usually measured in millimeters (mm).

weight
type: Property
comment: The weight of the device. Usually measured in kilograms (kg) or grams (g).

nominal diameter
comment: Nominal diameter or width of the tubes in the tube bundle. Usually measured in millimeters (mm).
type: Property

inlet connection size
type: Property
comment: Size of the inlet connection. Usually measured in millimeters (mm).

size
type: Property
comment: The size of the connection to the valve (or to each connection for faucets, mixing valves, etc.). Usually measured in millimeters (mm).

blade edge
comment: Blade edge.
type: DatatypeProperty
range: string

Flow moving device
comment: The distribution flow element FlowMovingDevice defines the occurrence of an apparatus used to distribute, circulate or perform conveyance of fluids, including liquids and gases (such as a pump or fan), and typically participates in a flow distribution system.
subclass of: DistributionFlowDevice
type: Class
source: ifcflowmovingdevice.htm

nominal latent capacity
type: Property
comment: Nominal latent capacity. Usually measured in Watts (W, J/s).

frame size
comment: Designation of the frame size according to the named range of frame sizes designated at the place of use or according to a given standard.
type: DatatypeProperty
range: string

secondary frequency
comment: The frequency that has been transformed and is running out of the transformer on the secondary side. Usually measured in cycles/s or Hertz (Hz).
type: Property

horizontal spacing
comment: Horizontal spacing between tubes in the tube bundle. Usually measured in millimeters (mm).
type: Property

internal control
comment: Internal modulation control.
type: DatatypeProperty
range: string

nominal sorrounding temperature cooling
comment: Nominal surrounding temperature (refers to nominal cooling capacity). Usually measured in degrees Kelvin (K).
type: Property

in line row spacing
type: Property
comment: In-line tube row spacing. Usually measured in millimeters (mm).

operating weight
type: Property
comment: Operating weight of the tank including all of its contents. Usually measured in kilograms (kg) or grams (g).

capacity people
comment: Capacity of the transportation element measured in numbers of person.
type: DatatypeProperty
range: nonNegativeInteger

is external
comment: Indication whether the element is designed for use in the exterior (TRUE) or not (FALSE). If (TRUE) it is an external element and faces the outside of the building.
type: DatatypeProperty
range: boolean

basin reserve volume
type: Property
comment: Volume between operating and overflow levels in cooling tower basin. Usually measured in cubic metre (m3).

is neutral secondary terminal available
range: boolean
comment: An indication of whether the neutral point of the secondary winding is available as a terminal (=TRUE) or not (= FALSE).
type: DatatypeProperty

nominal heat transfer coefficient
comment: Nominal overall heat transfer coefficient associated with nominal heat transfer area. Usually measured in Watts/m2 Kelvin.
type: Property

has hot gas bypass
comment: Whether or not hot gas bypass is provided for the compressor. TRUE = Yes, FALSE = No.
type: DatatypeProperty
range: boolean

nominal heat rejection rate
type: Property
comment: Sum of the refrigeration effect and the heat equivalent of the power input to the compressor. Usually measured in Watts (W, J/s).

ideal capacity
type: Property
comment: Compressor capacity under ideal conditions. Usually measured in Watts (W, J/s).

nominal sorrounding humidity cooling
type: Property
comment: Nominal surrounding humidity (refers to nominal cooling capacity). Usually measured in degrees Kelvin (K).

heat transfer medium
range: string
comment: Enumeration defining the heat transfer medium if applicable.
type: DatatypeProperty

heat transfer type enum
range: string
comment: Type of heat transfer between the two air streams.
type: DatatypeProperty

number of circuits
range: integer
comment: Number of parallel fluid tube circuits.
type: DatatypeProperty

inside diameter
comment: Actual inner diameter of the tube in the tube bundle. Usually measured in millimeters (mm).
type: Property

limiting terminal size
comment: The maximum terminal size capacity of the device. Usually measured in square metre (m2).
type: Property

pressure rating
type: Property
comment: Nominal pressure rating of the boiler as rated by the agency having jurisdiction. Usually measured in Pascals (Pa, N/m2).

nomminal rotation speed
type: Property
comment: Pump rotational speed under nominal conditions. Usually measured in cycles/s.

ambient design wet bulb temperature
comment: Ambient design wet bulb temperature used for selecting the cooling tower. Usually measured in degrees Kelvin (K).
type: Property

operation
type: DatatypeProperty
comment: The operational mechanism for the damper operation.
range: string

nominal moisture gain
type: Property
comment: Nominal rate of water vapor added into the airstream. Usually measured in kg/s.

frame thickness
comment: The thickness of the damper frame material. Usually measured in millimeters (mm).
type: Property

pump flow rate range
comment: Allowable range of volume of fluid being pumped against the resistance specified. Usually measured in kg/s.
type: Property

nominal body width
comment: Nominal or quoted length, measured along the y-axis of the local coordinate system of the object, of the body of the object. Usually measured in millimeters (mm).
type: Property

flow coefficient
type: Property
comment: Flow coefficient (the quantity of fluid that passes through a fully open valve at unit pressure drop), typically expressed as the Kv or Cv value for the valve.

fluid flow rate range
type: Property
comment: Possible range of fluid flowrate that can be delivered. Usually measured in m3/s.

nominal part load ratio
comment: Allowable part load ratio range.
type: Property

nominal length or diameter
type: Property
comment: The nominal length or, in the case of a vertical cylindrical tank, the nominal diameter of the tank. Usually measured in millimeters (mm).

lamp maintenance factor
comment: Non recoverable losses of luminous flux of a lamp due to lamp depreciation i.e. the decreasing of light output of a luminaire due to aging and dirt.
type: Property

water pressure range
comment: Allowable water circuit working pressure range. Usually measured in Pascals (Pa, N/m2).
type: Property

pattern type
comment: Defines the types of pattern (or shape of a tank that may be specified.
range: string
type: DatatypeProperty

nominal supply water temperature heating
type: Property
comment: Nominal supply water temperature (refers to nominal heating capacity). Usually measured in degrees Kelvin (K).

heat exchange area
comment: Heat exchange area. Usually measured in square metre (m2).
type: Property

water pressure range
type: Property
comment: Allowable water circuit working pressure range. Usually measured in Pascals (Pa, N/m2).

volumen
comment: Total volume of fluid in the tubes and their headers. Usually measured in cubic metre (m3).
type: Property

nominal heat transfer area
type: Property
comment: Nominal heat transfer surface area associated with nominal overall heat transfer coefficient. Usually measured in square metre (m2).

nominal frequency
comment: The nominal frequency of the supply. Usually measured in cycles/s or Hertz (Hz).
type: Property

placement type
type: DatatypeProperty
comment: Indicates how the device is designed to be placed.
range: string

nominal sensible capacity
type: Property
comment: Nominal sensible capacity. Usually measured in Watts (W, J/s).

start current factor
type: Property
comment: IEC. Start current factor defines how large the peek starting current will become on the engine. StartCurrentFactor is multiplied to NominalCurrent and we get the start current.

maximum spectrum
type: Property
comment: The spectrum of radiation describes its composition with regard to wavelength. Light, for example, as the portion of electromagnetic radiation that is visible to the human eye, is radiation with wavelengths in the range of approx. 380 to 780 nm (1 nm = 10 m). The corresponding range of colours varies from violet to indigo, blue, green, yellow, orange, and red. These colours form a continuous spectrum, in which the various spectral sectors merge into each other.

body mass
type: Property
comment: Overall body mass of the heater. Usually measured in kilograms (kg) or grams (g).

air flow rate range max
type: Property
comment: Maximum allowable air flow rate. Usually measured in m3/s.

color temperature
comment: The color temperature of any source of radiation is defined as the temperature (in Kelvin) of a black-body or Planckian radiator whose radiation has the same chromaticity as the source of radiation. Often the values are only approximate color temperatures as the black-body radiator cannot emit radiation of every chromaticity value. The color temperatures of the commonest artificial light sources range from less than 3000K (warm white) to 4000K (intermediate) and over 5000K (daylight). Usually measured in degrees Kelvin (K).
type: Property

minimum working pressure
type: Property
comment: Allowable minimum working pressure (relative to ambient pressure). Usually measured in Pascals (Pa, N/m2).

internal surface area
comment: Internal surface area. Usually measured in square metre (m2).
type: Property

water flow control system type
comment: Factory fitted waterflow control system.
range: string
type: DatatypeProperty

nominal rotation speed
type: Property
comment: Nominal fan wheel speed. Usually measured in cycles/s.

secondary current
type: Property
comment: The current that has been transformed and is running out of the transformer on the secondary side. Usually measured in Ampere (A).

number of rows
comment: Number of tube rows in the tube bundle assembly.
range: integer
type: DatatypeProperty

nominal water flow cooling
type: Property
comment: Nominal water flow (refers to nominal cooling capacity). Usually measured in m3/s.

water inlet temperature range
comment: Allowable water inlet temperature range. Usually measured in degrees Kelvin (K).
type: Property

motor enclosure type
type: DatatypeProperty
comment: A list of the available types of motor enclosure from which that required may be selected.
range: string

blade shape
type: DatatypeProperty
range: string
comment: Blade shape. Flat means triple V-groove.

operation temperature range
comment: Allowable operation ambient (air, fluid) temperature range. Usually measured in degrees Kelvin (K).
type: Property

solar reflectance
type: Property
comment: (Rsol): The ratio of incident solar radiation that is reflected by a shading system (also named _e). Note the following equation Asol + Rsol + Tsol = 1