The subject is upstream of the object in the context of some sequential process; some media is passed between them

Passes air

To specify the address of a building.

The class is associated with the given tag

The subject receives the given substance as an input to its internal process

Subject is physically located in the location given by the object

The subject produces or exports the given substance from its internal process

The subject is composed in part of the entity given by the object

The subject has a digital/analog input/output point given by the object

The subject has the given tag

The QUDT unit associated with this Point

The tag is associated with the given class

Subject is the physical location encapsulating the object

The subject measures a quantity or substance given by the object

The subject contributes to or performs the regulation of the substance given by the object

devices that serve all or part of the building and may include electric power, lighting, transportation, or service water heating, including, but not limited to, furnaces, boilers, air conditioners, heat pumps, chillers, water heaters, lamps, luminaires, ballasts, elevators, escalators, or other devices or installations.

Breaker Panel distributes power into various end-uses.

Bus Risers are commonly fed from a switchgear and rise up through a series of floors to the main power distribution source for each floor.

Building power is most commonly provided by utility company through a master disconnect switch (sometimes called a service disconnect) in the main electrical room of a building. The Utility Company provided master disconnect switch often owns or restricts access to this switch. There can also be other cases where a disconnect is placed into an electrical system to allow service cut-off to a portion of the building.

Devices or equipment that store energy in its various forms

A container that stores chemical energy that can be converted into electricity and used as a source of power

A device that changes direct current into alternating current

The Motor Control Center is a specialized type of switchgear which provides electrical power to major mechanical systems in the building such as HVAC components.

A device containing a block of electrical sockets allowing multiple electrical devices to be powered from a single electrical socket.

A main disconnect or service disconnect feeds power to a switchgear, which then distributes power to the rest of the building through smaller amperage-rated disconnects.

A Transformer is usually fed by a high-voltage source and then steps down the voltage to a lower-voltage feed for low-voltage application (such as lights). Transformers also can step up voltage, but this generally does not apply to in building distribution.

A device that provides vertical transportation between floors, levels or decks of a building, vessel or other structure

A panel-mounted device that provides status and control of a fire safety system

Movable objects intended to support various human activities such as seating, eating and sleeping

Utilize a gas distribution source to represent how gas is distributed across multiple destinations

See Heating_Ventilation_Air_Conditioning_System

Assembly consisting of sections containing a fan or fans and other necessary equipment to perform one or more of the following functions: circulating, filtration, heating, cooling, heat recovery, humidifying, dehumidifying, and mixing of air. Is usually connected to an air-distribution system.

see Rooftop_Unit

Packaged air conditioner mounted on a roof, the conditioned air being discharged directly into the rooms below or through a duct system.

Packaged air conditioner mounted on a roof, the conditioned air being discharged directly into the rooms below or through a duct system.

see Rooftop_Unit

Assembly consisting of sections containing a fan or fans and other necessary equipment to perform one or more of the following functions: circulating, filtration, heating, cooling, heat recovery, humidifying, dehumidifying, and mixing of air. Is usually connected to an air-distribution system.

A closed, pressure vessel that uses fuel or electricity for heating water or other fluids to supply steam or hot water for heating, humidification, or other applications.

A device that monitors and maintains the temperature, air distribution and humidity in a network room or data center.

A CRAC that is activated as part of a lead/lag operation or when an alarm occurs in a primary unit

Refrigerating machine used to transfer heat between fluids. Chillers are either direct expansion with a compressor or absorption type.

A chiller that utilizes a thermal or/and chemical process to produce the refrigeration effect necessary to provide chilled water. There is no mechanical compression of the refrigerant taking place within the machine, as occurs within more traditional vapor compression type chillers.

A chiller that uses the vapor compression cycle to chill water. It throws off the heat collected from the chilled water plus the heat from the compressor to a water loop

(1) device for mechanically increasing the pressure of a gas. (2) often described as being either open, hermetic, or semihermetic to describe how the compressor and motor drive is situated in relation to the gas or vapor being compressed. Types include centrifugal, axial flow, reciprocating, rotary screw, rotary vane, scroll, or diaphragm. 1. device for mechanically increasing the pressure of a gas. 2. specific machine, with or without accessories, for compressing refrigerant vapor.

A device that monitors and maintains the temperature, air distribution and humidity in a network room or data center.

A heat exchanger in which the primary heat transfer vapor changes its state to a liquid phase.

Element inserted into an air-distribution system or element of an air-distribution system permitting modification of the air resistance of the system and consequently changing the airflow rate or shutting off the airflow.

A damper that is part of an economizer that is used to module the flow of air

A damper that modulates the flow of exhaust air

A damper that modulates the flow of outside air

A damper that modulates the flow of return air

Device that, on proper variable sensing, initiates control signals or actions to conserve energy. A control system that reduces the mechanical heating and cooling requirement.

Any device with two or more blades or vanes attached to a rotating shaft used to produce an airflow for the purpose of comfort, ventilation, exhaust, heating, cooling, or any other gaseous transport.

A fan that pulls air through a cooling tower and across the louvers where the water falls to aid in heat exchange by the process of evaporation

Fan moving air discharged from HVAC vents

Fan moving exhaust air -- air that must be removed from a space due to contaminants

Fan moving return air -- air that is circulated from the building back into the HVAC system

Fan that is activated as part of a lead/lag operation or when a primary fan raises an alarm

Fan moving supply air -- air that is supplied from the HVAC system into the building

Fan activated to increase airflow beyond what is provided by the default configuration

Device to remove gases from a mixture of gases

A filter that is applied to the mixture of recirculated and outside air

A fume-collection device mounted over a work space, table, or shelf and serving to conduct unwanted gases away from the area enclosed.

See Heat_Exchanger

A heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another. The media may be separated by a solid wall to prevent mixing or they may be in direct contact

A heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another. The media may be separated by a solid wall to prevent mixing or they may be in direct contact

See Heat_Exchanger

Cooling or heating element made of pipe or tube that may or may not be finned and formed into helical or serpentine shape

A cooling element made of pipe or tube that removes heat from equipment, machines or airflows. Typically filled with either refrigerant or cold water.

A heating element typically made of pipe, tube or wire that emits heat. Typically filled with hot water, or, in the case of wire, uses electricity.

A heat exchanger in which the primary heat transfer vapor changes its state to a liquid phase.

A device that adds moisture to air or other gases

Machine for imparting energy to a fluid, causing it to do work, drawing a fluid into itself through an entrance port, and forcing the fluid out through an exhaust port.

A pump that performs work on water

A pump that performs work on chilled water; typically part of a chilled water system

A pump that is part of a condenser system; the pump circulates condenser water from the chiller back to the cooling tower

A pump that performs work on hot water; typically part of a hot water system

A heater used to warm the air in an enclosed area, such as a room or office

A device that regulates the volumetric flow rate and/or the temperature of the controlled medium.

See Fan_Coil_Unit

Terminal device consisting of a heating and/or cooling heat exchanger or 'coil' and fan that is used to control the temperature in the space where it is installed

Terminal device consisting of a heating and/or cooling heat exchanger or 'coil' and fan that is used to control the temperature in the space where it is installed

See Fan_Coil_Unit

See VAV

A device that regulates the volume and temperature of air delivered to a zone by opening or closing a damper

A device that regulates the volume and temperature of air delivered to a zone by opening or closing a damper

See VAV

See Variable_Air_Volume_Box_With_Reheat

A VAV box with a reheat coil mounted on the discharge end of the unit that can heat the air delivered to a zone

A VAV box with a reheat coil mounted on the discharge end of the unit that can heat the air delivered to a zone

See Variable_Air_Volume_Box_With_Reheat

An automatic control device used to maintain temperature at a fixed or adjustable setpoint.

An alarm that indicates a loss of water e.g. during transport

Electronic device that varies its output frequency to vary the rotating speed of a motor, given a fixed input frequency. Used with fans or pumps to vary the flow in the system as a function of a maintained pressure.

A VFD that drives a heat wheel

A device that regulates, directs or controls the flow of a fluid by opening, closing or partially obstructing various passageways

A valve that controls air temperature by modulating the amount of cold water flowing through a cooling coil

A valve that controls air temperature by modulating the amount of hot water flowing through a heating coil

A valve regulating the flow of domestic hot water

A valve that controls air temperature by modulating the amount of hot water flowing through a reheat coil

A valve installed on the return side of a heat exchanger

A valve that stops the flow of a fluid, usually for maintenance or safety purposes

A valve that modulates the flow of water

A valve that modulates the flow of chilled water

Electronic device that varies its output frequency to vary the rotating speed of a motor, given a fixed input frequency. Used with fans or pumps to vary the flow in the system as a function of a maintained pressure.

An alarm that indicates a loss of water e.g. during transport

A device that provides an occupant control over a lighting system

A switch used to operate all or part of a lighting installation

A switch providing continuous control over all or part of a lighting installation; typically potentiometer-based

A switch used to operate all or part of a lighting installation that uses a touch-based mechanism (typically resistive or capacitive) rather than a mechanical actuator

A complete lighting unit consisting of a lamp or lamps and ballast(s) (when applicable) together with the parts designed to distribute the light, to position and protect the lamps, and to connect the lamps to the power supply.

A power source for a luminaire

Device consisting of an assembly of parallel sloping vanes, intended to permit the passage of air while providing a measure of protection against environmental influences

A device that measure usage or consumption of some media --- typically a form energy or power.

A meter that measures usage or consumption of some media for a whole building

A meter that measures the usage or consumption of chilled water of a whole building

A meter that measures the usage or consumption of electricity of a whole building

A meter that measures the usage or consumption of gas of a whole building

A meter that measures the usage or consumption of hot water of a whole building

A meter that measures the usage or consumption of water of a whole building

A meter that measures the usage or consumption of electricity

A meter that measures the usage or consumption of gas

A meter that measures the usage or consumption of water

A meter that measures the usage or consumption of chilled water

A meter that measures the usage or consumption of hot water

A colloquial term for a photovoltaic module. A Solar panel is an assembly of photovoltaic cells mounted in a framework for installation that use sunlight as a source of energy to generate direct current electricity.

Utilize a steam distribution source to represent how steam is distributed across multiple destinations

Utilize a water distribution source to represent how water is distributed across multiple destinations (pipes)

A dedicated weather measurement station

An independent unit of the built environment with a characteristic spatial structure, intended to serve at least one function or user activity [ISO 12006-2:2013]

a structure wholly or partially enclosed within exterior walls, or within exterior and party walls, and a roof, affording shelter to persons, animals, or property.

A level, typically representing a horizontal aggregation of spaces that are vertically bound. (referring to IFC)

The floor of a building which is partly or entirely below ground level.

A part of the physical world or a virtual world whose 3D spatial extent is bounded actually or theoretically, and provides for certain functions within the zone it is contained in.

Base class for all more specific room types.

facility acceptable to the local, national, or international recognized authority having jurisdiction and which provides uniform testing and examination procedures and standards for meeting design, manufacturing, and factory testing requirements.

in a gas separation unit, the insulated section that contains the low-temperature heat exchangers and distillation columns.

(also known as climatic chamber), enclosed space designed to create a particular environment.

cold chamber usually kept at a temperature of 22°F to 31°F (–5°C to –1°C), with high-volume air circulation.

hot air chamber forming part of an air handler.

A level, typically representing a horizontal aggregation of spaces that are vertically bound. (referring to IFC)

(1) a separately controlled heated or cooled space. (2) one occupied space or several occupied spaces with similar occupancy category, occupant density, zone air distribution effectiveness, and zone primary airflow per unit area. (3) space or group of spaces within a building for which the heating, cooling, or lighting requirements are sufficiently similar that desired conditions can be maintained throughout by a single controlling device.

combustion chamber in a furnace or boiler.

a space or group of spaces, within a building with heating, cooling, and ventilating requirements, that are sufficiently similar so that desired conditions (e.g., temperature) can be maintained throughout using a single sensor (e.g., thermostat or temperature sensor).

substance, as a liquid or gas, that is capable of flowing and that changes shape when acted on by a force.

state of matter in which substances exist in the form of nonaggregated molecules and which, within acceptable limits of accuracy, satisfy the ideal gas laws; usually a highly superheated vapor. See [[state]].

the invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen.

air contained within a building

air in a bypass duct, used to relieve static pressure

the air exiting the registers (vents).

air that must be removed from a space due to contaminants, regardless of pressurization

(1) air that contains two or more streams of air. (2) combined outdoor air and recirculated air.

air external to a defined zone (e.g., corridors).