SAREF4BLDG: an extension of SAREF for the building domain
type: Ontology
contributor: www.maxime-lefrancois.info
contributor: dragoni
creator: mpoveda
creator: me
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.
issued: 2025-04-24
license: etsi-software-license
modified: 2025-04-24
publisher: www.etsi.org
source: saref4bldg
preferred namespace prefix: s4bldg
comment: Information about changes compared to version 1.1.1: - Updated namespaces for compatibility with SAREF v3.
comment: Information about changes compared to version 1.1.2: - see https://labs.etsi.org/rep/saref/saref4bldg/-/milestones/1.
imports: v4.1.1
prior version: v1.1.2
version IRI: v2.1.1
version info: v2.1.1

Actuator
type: Class
source: ifcactuator.htm
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.
subclass of: Actuator
subclass of: Distribution control device

Air to air heat recovery
type: Class
source: ifcairtoairheatrecovery.htm
source: pset airtoairheatrecoverytypecommon.htm
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
  has value: secondary air flow rate range
  on property: hasProperty
subclass of: Restriction
  has value: primary 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: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: primary air flow rate range
  on property: hasProperty
subclass of: Energy conversion device

Alarm
type: Class
source: ifcalarm.htm
source: pset alarmtypecommon.htm
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

Audio visual appliance
type: Class
source: ifcaudiovisualappliance.htm
source: pset audiovisualappliancetypecommon.htm
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.
subclass of: Restriction
  has value: audio volume
  on property: hasProperty
subclass of: Flow terminal

Boiler
type: Class
source: ifcboiler.htm
source: pset boilertypecommon.htm
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: nominal part load ratio
  on property: hasProperty
subclass of: Restriction
  has value: outlet temperature range
  on property: hasProperty
subclass of: Restriction
  has value: nominal energy consumption
  on property: hasProperty
subclass of: Restriction
  has value: outlet temperature range
  on property: hasProperty
subclass of: Restriction
  has value: water storage capacity
  on property: hasProperty
subclass of: Restriction
  has value: heat transfer surface area
  on property: hasProperty
subclass of: Restriction
  has value: water inlet temperature range
  on property: hasProperty
subclass of: Restriction
  has value: pressure rating
  on property: hasProperty
subclass of: Restriction
  has value: water inlet temperature range
  on property: hasProperty
subclass of: Energy conversion device

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

Chiller
type: Class
source: ifcchiller.htm
source: pset chillertypecommon.htm
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 evaporating temmperature
  on property: hasProperty
subclass of: Restriction
  has value: nominal power consumption
  on property: hasProperty
subclass of: Restriction
  has value: nominal heat rejection rate
  on property: hasProperty
subclass of: Restriction
  has value: nominal efficiency
  on property: hasProperty
subclass of: Restriction
  has value: nominal condensing temperature
  on property: hasProperty
subclass of: Restriction
  has value: nominal capacity
  on property: hasProperty
subclass of: Energy conversion device

Coil
type: Class
source: ifccoil.htm
source: pset coiltypecommon.htm
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.
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: nominal ua
  on property: hasProperty
subclass of: Restriction
  has value: nominal sensible capacity
  on property: hasProperty
subclass of: Restriction
  has value: air flow rate range max
  on property: hasProperty
subclass of: Restriction
  has value: air flow rate range min
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: nominal latent capacity
  on property: hasProperty
subclass of: Energy conversion device

Communication appliance
type: Class
source: ifccommunicationsappliance.htm
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.
subclass of: Flow terminal

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

Condenser
type: Class
source: ifccondenser.htm
source: pset condensertypecommon.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: Restriction
  has value: nominal heat transfer coefficient
  on property: hasProperty
subclass of: Restriction
  has value: internal refrigerant volume
  on property: hasProperty
subclass of: Restriction
  has value: nominal heat transfer area
  on property: hasProperty
subclass of: Restriction
  has value: internal surface area
  on property: hasProperty
subclass of: Restriction
  has value: internal water volume
  on property: hasProperty
subclass of: Restriction
  has value: external surface area
  on property: hasProperty
subclass of: Energy conversion device

Controller
type: Class
source: ifccontroller.htm
source: pset controllertypecommon.htm
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).
subclass of: Distribution control device

Cooled beam
type: Class
source: ifccooledbeam.htm
source: pset cooledbeamtypecommon.htm
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.
subclass of: Restriction
  has value: nominal supply water temperature heating
  on property: hasProperty
subclass of: Restriction
  has value: nominal water flow cooling
  on property: hasProperty
subclass of: Restriction
  has value: nominal return water temperature cooling
  on property: hasProperty
subclass of: Restriction
  has value: nominal sorrounding temperature cooling
  on property: hasProperty
subclass of: Restriction
  has value: coil length
  on property: hasProperty
subclass of: Restriction
  has value: nominal supply water temperature cooling
  on property: hasProperty
subclass of: Restriction
  has value: nominal return water temperature heating
  on property: hasProperty
subclass of: Restriction
  has value: nominal cooling capacity
  on property: hasProperty
subclass of: Restriction
  has value: water pressure range
  on property: hasProperty
subclass of: Restriction
  has value: nominal water flow heating
  on property: hasProperty
subclass of: Restriction
  has value: nominal heating capacity
  on property: hasProperty
subclass of: Restriction
  has value: coil width
  on property: hasProperty
subclass of: Restriction
  has value: water pressure range
  on property: hasProperty
subclass of: Restriction
  has value: nominal sorrounding temperature heating
  on property: hasProperty
subclass of: Restriction
  has value: nominal sorrounding humidity cooling
  on property: hasProperty
subclass of: Energy conversion device

Cooling tower
type: Class
source: ifccoolingtower.htm
source: pset coolingtowertypecommon.htm
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
  has value: water requirement
  on property: hasProperty
subclass of: Restriction
  has value: nominal capacity
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: lift elevation difference
  on property: hasProperty
subclass of: Restriction
  has value: ambient design dry bulb temperature
  on property: hasProperty
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
  has value: operation temperature range
  on property: hasProperty
subclass of: Energy conversion device

Damper
type: Class
source: ifcdamper.htm
source: pset dampertypecommon.htm
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
  has value: maximum working pressure
  on property: hasProperty
subclass of: Restriction
  has value: temperature rating
  on property: hasProperty
subclass of: Restriction
  has value: blade thickness
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: leakage fully closed
  on property: hasProperty
subclass of: Restriction
  has value: frame thickness
  on property: hasProperty
subclass of: Restriction
  has value: face area
  on property: hasProperty
subclass of: Restriction
  has value: air flow rate range max
  on property: hasProperty
subclass of: Restriction
  has value: open pressure drop
  on property: hasProperty
subclass of: Restriction
  has value: close off rating
  on property: hasProperty
subclass of: Restriction
  has value: nominal air flow rate
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: frame depth
  on property: hasProperty
subclass of: Flow controller

Duct silencer
type: Class
source: ifcductsilencer.htm
source: pset ductsilencertypecommon.htm
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
  has value: air flow rate range min
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: weight
  on property: hasProperty
subclass of: Restriction
  has value: minimum working pressure
  on property: hasProperty
subclass of: Restriction
  has value: length
  on property: hasProperty
subclass of: Restriction
  has value: hydraulic diameter
  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
subclass of: Restriction
  has value: air flow rate range max
  on property: hasProperty
subclass of: Flow treatment device

Electric appliance
type: Class
source: ifcelectricappliance.htm
source: pset electricappliancetypecommon.htm
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.
subclass of: Flow terminal

Electric flow storage device
type: Class
source: ifcelectricflowstoragedevice.htm
source: pset electricflowstoragedevicetypecommon.htm
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
  on property: hasProperty
subclass of: Restriction
  has value: nominal frequency
  on property: hasProperty
subclass of: Restriction
  has value: nominal supply voltage offset
  on property: hasProperty
subclass of: Flow storage device

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

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

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

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

Evaporative cooler
type: Class
source: ifcevaporativecooler.htm
source: pset evaporativecoolertypecommon.htm
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
subclass of: Restriction
  has value: heat exchange area
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Energy conversion device

Evaporator
type: Class
source: ifcevaporator.htm
source: pset evaporatortypecommon.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 water volume
  on property: hasProperty
subclass of: Restriction
  has value: internal refrigerant volume
  on property: hasProperty
subclass of: Restriction
  has value: external surface area
  on property: hasProperty
subclass of: Restriction
  has value: nominal heat transfer area
  on property: hasProperty
subclass of: Restriction
  has value: internal surface area
  on property: hasProperty
subclass of: Restriction
  has value: nominal heat transfer coefficient
  on property: hasProperty
subclass of: Energy conversion device

Fan
type: Class
source: ifcfan.htm
source: pset fantypecommon.htm
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.
subclass of: Restriction
  has value: nominal total pressure
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: nominal power rate
  on property: hasProperty
subclass of: Restriction
  has value: nominal rotation speed
  on property: hasProperty
subclass of: Restriction
  has value: nominal air flow rate
  on property: hasProperty
subclass of: Restriction
  has value: operational riterial
  on property: hasProperty
subclass of: Restriction
  has value: nominal static pressure
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Flow moving device

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

Fire suppression terminal
type: Class
source: ifcfiresuppressionterminal.htm
source: pset firesuppressionterminaltypecommon.htm
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.
subclass of: Flow terminal

Flow instrument
type: Class
source: ifcflowinstrument.htm
source: pset flowinstrumenttypecommon.htm
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.)
subclass of: Distribution control device

Flow meter
type: Class
source: ifcflowmeter.htm
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

Heat exchanger
type: Class
source: ifcheatexchanger.htm
source: pset heatexchangertypecommon.htm
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).
subclass of: Energy conversion device

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

Interceptor
type: Class
source: ifcinterceptor.htm
source: pset interceptortypecommon.htm
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
  has value: cover width
  on property: hasProperty
subclass of: Restriction
  has value: ventilating pipe size
  on property: hasProperty
subclass of: Restriction
  has value: cover length
  on property: hasProperty
subclass of: Restriction
  has value: nominal body depth
  on property: hasProperty
subclass of: Restriction
  has value: nominal body width
  on property: hasProperty
subclass of: Restriction
  has value: nominal body length
  on property: hasProperty
subclass of: Restriction
  has value: inlet connection size
  on property: hasProperty
subclass of: Restriction
  has value: outlet connection size
  on property: hasProperty
subclass of: Flow treatment device

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

Medical device
type: Class
source: ifcmedicaldevice.htm
source: pset medicaldevicetypecommon.htm
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.
subclass of: Flow terminal

Outlet
type: Class
source: ifcoutlet.htm
source: pset outlettypecommon.htm
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.
subclass of: Flow terminal

Protective device
type: Class
source: ifcprotectivedevice.htm
source: pset protectivedevicetypecommon.htm
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.
subclass of: Flow controller

Protective device tripping unit
type: Class
source: ifcprotectivedevicetrippingunit.htm
source: pset protectivedevicetrippingunittypecommon.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.
subclass of: Restriction
  has value: limiting terminal size
  on property: hasProperty
subclass of: Distribution control device

Pump
type: Class
source: ifcpump.htm
source: pset pumptypecommon.htm
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.
subclass of: Restriction
  has value: connection size
  on property: hasProperty
subclass of: Restriction
  has value: net positive suction head
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: nomminal rotation speed
  on property: hasProperty
subclass of: Restriction
  has value: pump flow rate range
  on property: hasProperty
subclass of: Restriction
  has value: flow resistance range
  on property: hasProperty
subclass of: Restriction
  has value: operation temperature range
  on property: hasProperty
subclass of: Restriction
  has value: pump flow rate range
  on property: hasProperty
subclass of: Restriction
  has value: flow resistance range
  on property: hasProperty
subclass of: Flow moving device

Sanitary terminal
type: Class
source: ifcsanitaryterminal.htm
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.
subclass of: Flow terminal

Sensor
type: Class
source: ifcsensor.htm
source: pset sensortypecommon.htm
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.
subclass of: Sensor
subclass of: Distribution control device

Shading device
type: Class
source: ifcshadingdevice.htm
source: pset shadingdevicecommon.htm
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: visible light transmittance
  on property: hasProperty
subclass of: Restriction
  has value: solar reflectance
  on property: hasProperty
subclass of: Restriction
  has value: solar transmittance
  on property: hasProperty
subclass of: Restriction
  has value: thermal transmittance
  on property: hasProperty
subclass of: Building device

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

Space heater
type: Class
source: ifcspaceheater.htm
source: pset spaceheatertypecommon.htm
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.
subclass of: Restriction
  has value: thermal efficiency
  on property: hasProperty
subclass of: Restriction
  has value: thermal mass heat capacity
  on property: hasProperty
subclass of: Restriction
  has value: body mass
  on property: hasProperty
subclass of: Restriction
  has value: output capacity
  on property: hasProperty
subclass of: Flow terminal

Switching device
type: Class
source: ifcswitchingdevice.htm
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.
subclass of: Flow controller

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

Transformer
type: Class
source: ifctransformer.htm
source: pset transformertypecommon.htm
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: primary current
  on property: hasProperty
subclass of: Restriction
  has value: maximum apparent power
  on property: hasProperty
subclass of: Restriction
  has value: secondary current
  on property: hasProperty
subclass of: Restriction
  has value: primary voltage
  on property: hasProperty
subclass of: Restriction
  has value: secondary voltage
  on property: hasProperty
subclass of: Restriction
  has value: primary frequency
  on property: hasProperty
subclass of: Restriction
  has value: primary apparent power
  on property: hasProperty
subclass of: Restriction
  has value: imaginary impedance ratio
  on property: hasProperty
subclass of: Restriction
  has value: real impedance ratio
  on property: hasProperty
subclass of: Restriction
  has value: secondary frequency
  on property: hasProperty
subclass of: Restriction
  has value: secondary apparent power
  on property: hasProperty
subclass of: Energy conversion device

Transport element
type: Class
source: ifctransportelement.htm
source: pset transportelementcommon.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.
subclass of: Restriction
  has value: capacity weight
  on property: hasProperty
subclass of: Restriction
  all values from: positiveInteger
  on property: capacity people
subclass of: Device

Tube bundle
type: Class
source: ifctubebundle.htm
source: pset tubebundletypecommon.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.
subclass of: Restriction
  has value: nominal diameter
  on property: hasProperty
subclass of: Restriction
  has value: in line row spacing
  on property: hasProperty
subclass of: Restriction
  has value: volumen
  on property: hasProperty
subclass of: Restriction
  has value: inside diameter
  on property: hasProperty
subclass of: Restriction
  has value: thermal conductivity
  on property: hasProperty
subclass of: Restriction
  has value: vertical spacing
  on property: hasProperty
subclass of: Restriction
  has value: outside diameter
  on property: hasProperty
subclass of: Restriction
  has value: horizontal spacing
  on property: hasProperty
subclass of: Restriction
  has value: staggered row spacing
  on property: hasProperty
subclass of: Restriction
  has value: length
  on property: hasProperty
subclass of: Restriction
  has value: fouling factor
  on property: hasProperty
subclass of: Energy conversion device

Unitary control element
type: Class
source: ifcunitarycontrolelement.htm
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.
subclass of: Distribution control device

Valve
type: Class
source: ifcvalve.htm
source: pset valvetypecommon.htm
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: flow coefficient
  on property: hasProperty
subclass of: Restriction
  has value: size
  on property: hasProperty
subclass of: Restriction
  has value: test pressure
  on property: hasProperty
subclass of: Restriction
  has value: close off rating
  on property: hasProperty
subclass of: Restriction
  has value: working pressure
  on property: hasProperty
subclass of: Flow controller

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

access type
type: DatatypeProperty
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.
range: string

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

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

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

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

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

capacity control
type: DatatypeProperty
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.
range: string

capacity control type
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.
range: string

circuit type
type: DatatypeProperty
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

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

color rendering index
type: DatatypeProperty
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.
range: integer

control strategy
type: DatatypeProperty
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.
range: string

end shape type
type: DatatypeProperty
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

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

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

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

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

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

fire exit
type: DatatypeProperty
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.
range: boolean

flow arrangement
type: DatatypeProperty
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.
range: string

frame size
type: DatatypeProperty
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.
range: string

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

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

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

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

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

has part winding
type: DatatypeProperty
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) .
range: boolean

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

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

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

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

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

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

is external
type: DatatypeProperty
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.
range: boolean

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

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

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

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

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

is pluggable outlet
type: DatatypeProperty
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).
range: boolean

is water storage heater
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.
range: boolean

lamp ballast type
type: DatatypeProperty
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).
range: string

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

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

manual override
type: DatatypeProperty
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.
range: boolean

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

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

motor drive type
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.
range: string

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

nominal supply voltage offset
type: ObjectProperty
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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

read out type
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.
range: string

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

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

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

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

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

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

spray type
type: DatatypeProperty
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

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

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

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

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

transformer vector group
type: DatatypeProperty
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.
range: string

valve mechanism
type: DatatypeProperty
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.
range: string

valve operation
type: DatatypeProperty
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.
range: string

valve pattern
type: DatatypeProperty
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

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

Building
type: Class
source: ifcbuilding.htm
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).
subclass of: Restriction
  all values from: Building space
  on property: has space
subclass of: SpatialThing

Building object
type: Class
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)
subclass of: Physical object

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

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

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

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.

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

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

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

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

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

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

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

color temperature
type: Property
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).

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

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

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).

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).

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).

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

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

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

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

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).

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

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.

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).

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).

fluid flow rate range
type: Property
comment: Possible range of fluid flowrate that can be delivered. 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.

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

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

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

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

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

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

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

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

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

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

imaginary impedance ratio
type: Property
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.

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

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

initial resistance
type: Property
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).

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

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

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

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

lamp maintenance factor
type: Property
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.

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

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

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

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

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

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 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 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).

nominal body width
type: Property
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).

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

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

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

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

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

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

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

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

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

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

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).

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

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

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).

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

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

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

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

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

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

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

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

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

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

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

nominal sensible capacity
type: Property
comment: Nominal sensible capacity. 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).

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

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

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).

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

nominal supply voltage offset
type: Property
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.

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

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

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

nominal ua
type: Property
comment: Nominal UA value.

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

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

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

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).

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

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

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

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.

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

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

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

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

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

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

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

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).

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

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

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).

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).

primary frequency
type: Property
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).

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).

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

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

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.

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).

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

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

secondary apparent power
type: Property
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).

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).

secondary frequency
type: Property
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).

secondary voltage
type: Property
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).

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).

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

solar transmittance
type: Property
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

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.

minimum 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.

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

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.

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

te time
type: Property
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.

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

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

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

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

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

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

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

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

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

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.

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.

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

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

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

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

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

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

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

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

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

Distribution device
type: Class
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)
subclass of: Building device

Flow storage device
type: Class
source: ifcflowstoragedevice.htm
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).
subclass of: DistributionFlowDevice

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

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

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

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

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

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

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

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

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

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

maximum power output
type: Property
comment: The maximum output power rating of the engine. 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 working pressure
type: Property
comment: Maximum working pressure. Usually measured in Pascals (Pa, N/m2).

Flow moving device
type: Class
source: ifcflowmovingdevice.htm
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

Flow treatment device
type: Class
source: ifcflowtreatmentdevice.htm
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

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

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

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

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

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

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

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

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

DistributionFlowDevice
type: Class
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)
subclass of: Distribution device

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

Distribution control device
type: Class
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

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

Flow terminal
type: Class
source: ifcflowterminal.htm
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.
subclass of: DistributionFlowDevice

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

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

Energy conversion device
type: Class
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.
subclass of: DistributionFlowDevice