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

Passes air

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 source of telemetry identified by the object. In some systems the source of telemetry may be represented as a digital/analog input/output point

Points to the relevant QUDT definition

Indicates a submeter of this meter

The subject has the given tag

The QUDT unit associated with this Brick entity (usually a Brick Point instance or Entity Property)

The tag is associated with the given class

Subject is the physical location encapsulating the object

Indicates the meter measuring the consumption/production of some substance by the subject entity

The subject is a source of telemetry related to the object. In some systems the source of telemetry may be represented as a digital/analog input/output point

Indicates the parent for which this meter is a submeter

Indicates the entity whose consumption/production of some substance is measured by this meter

The nominal rated voltage input of the entity

The maximum voltage that can be input to the entity

The minimum voltage that can be input to the entity

The nominal rated voltage output of the entity

The maximum voltage that can be output by the entity

The minimum voltage that can be output by the entity

The basic value of an entity property

Description of how the dta for this point is aggregated

Entity has 2-dimensional area

Entity has gross 2-dimensional area

Entity has net 2-dimensional area

Surface area of a panel, such as a PV panel

(Horizontal) angle between a projected vector and a reference vector (typically a compass bearing). The projected vector usually indicates the direction of a face or plane.

Enumerated string applied to a site record to indicate the building's primary function. The list of primary functions is derived from the US Energy Star program (adopted from Project Haystack)

The percent efficiency of the conversion process (usually to power or energy) carried out by the entity

The measured percentage of sunlight that is converted into usable power

The *rated* percentage of sunlight that is converted into usable power, as measured using Standard Test Conditions (STC): 1000 W/sqm irradiance, 25 degC panel temperature, no wind

Measurement of a chiller ability to remove heat (adopted from Project Haystack)

The location of an entity in latitude/longitude

The current flow type of the entity

Marks a concept as deprecated

Entity has these phases

Entity has these electrical AC phases

True if the associated meter is 'virtual', i.e. a logical meter which includes or aggregates information from a variety of sources such as other submeters or equipment.

The last known value of the Point entity

The nominal measured power input of the entity

The nominal measured power output of the entity

The associated operational stage

The number of operational stages supported by this eqiupment

Entity has this power complexity

Entity has this power flow relative to the building'

The nominal rated current input of the entity

The maximum current that can be input to the entity

The minimum current that can be input to the entity

The nominal rated current output of the entity

The maximum current that can be output by the entity

The minimum current that can be output by the entity

The nominal rated power input of the entity

The nominal rated power output of the entity

The % change in power output for every degree celsius that the entity is hotter than 25 degrees celsius

The area-weighted average heat transfer coefficient (commonly referred to as a U-value)

The area-weighted average heat transfer coefficient (commonly referred to as a U-value) for a building envelope

The direction an entity is facing in degrees above the horizon

Entity has 3-dimensional volume

Four digit year that a building was first built. (adopted from Project Haystack)

A collection of connected equipment; part of a System

The set of connected equipment serving one path of air

A collection of equipment that transport and regulate water among each other

A collection of equipment that transport and regulate chilled water among each other

A collection of equipment that transport and regulate hot water among each other

A collection of photovoltaic panels

A collection of photovoltaic panels

A collection of sites

A System is a combination of equipment and auxiliary devices (e.g., controls, accessories, interconnecting means, and termi­nal elements) by which energy is transformed so it performs a specific function such as HVAC, service water heating, or lighting. (ASHRAE Dictionary).

The equipment, devices and conduits that handle the production and distribution of domestic hot water in a building

Devices that serve or are part of the electrical subsystem in the building

A collection of devices that generates, stores or transports electricity

A collection of devices that generates electricity

A collection of photovoltaic devices that generates energy

A collection of devices that stores electricity

A collection of batteries that provides energy storage, along with their supporting equipment

See Heating_Ventilation_Air_Conditioning_System

The equipment, distribution systems and terminals that provide, either collectively or individually, the processes of heating, ventilating or air conditioning to a building or portion of a building

The equipment, distribution systems and terminals that provide, either collectively or individually, the processes of heating, ventilating or air conditioning to a building or portion of a building

See Heating_Ventilation_Air_Conditioning_System

The equipment, distribution systems and terminals that introduce or exhaust, either collectively or individually, the air into and from the building

The equipment, devices, and conduits that handle the introduction and distribution of ventilation air in the building

The equipment, devices and conduits that handle the production and distribution of steam in a building

The equipment, devices and conduits that handle the production and distribution of water in a building

The equipment, devices and conduits that handle the production and distribution of chilled water in a building

A heat rejection system consisting of (typically) cooling towers, condenser water pumps, chillers and the piping connecting the components

The equipment, devices and conduits that handle the production and distribution of hot water in a building

The equipment, devices and interfaces that serve or are a part of the lighting subsystem in a building

A system that can power down a single piece of equipment or a single system from a single point

A system containing devices and equipment that monitor, detect and suppress fire hazards

Devices that can control daylighting through various means

A group of Blinds commonly attached to a single controller.

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

Fire alarm panel is the controlling component of a fire alarm system.

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

A device for manually activating fire alarm

Manual alarm call points are designed for the purpose of raising an alarm manually once verification of a fire or emergency condition exists. by operating the push button or break glass the alarm signal can be raised.

An active fire protection device (usually wall-mounted) that when activated initiates an alarm on a fire alarm system. In its simplest form the user activates the alarm by pulling the handle down.

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

A low platform in a space or on a stage

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 Dual_Duct_Air_Handling_Unit

An air handling unit that contains hot and cold decks to supply heating and cooling to a building

See Dedicated_Outdoor_Air_System_Unit

A device that conditions and delivers 100% outdoor air to its assigned spaces. It decouples air-conditioning of the outdoor air, usually used to provide minimum outdoor air ventilation, from conditioning of the internal loads.

A device that conditions and delivers 100% outdoor air to its assigned spaces. It decouples air-conditioning of the outdoor air, usually used to provide minimum outdoor air ventilation, from conditioning of the internal loads.

See Dedicated_Outdoor_Air_System_Unit

An air handling unit that contains hot and cold decks to supply heating and cooling to a building

See Dual_Duct_Air_Handling_Unit

See Makeup_Air_Unit

A device designed to condition ventilation air introduced into a space or to replace air exhausted from a process or general area exhaust. The device may be used to prevent negative pressure within buildings or to reduce airborne contaminants in a space.

A device designed to condition ventilation air introduced into a space or to replace air exhausted from a process or general area exhaust. The device may be used to prevent negative pressure within buildings or to reduce airborne contaminants in a space.

See Makeup_Air_Unit

A type of AHU, use to pre-treat the outdoor air before feed to AHU

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.

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 component of the HVAC the receives air from the air handling unit or room to distribute or exhaust to or from the building

A component of the HVAC the receives air from the air handling unit to distribute to the building

A component of the HVAC the receives air from the room to recirculate or exhaust to or from the building

A component of the HVAC the receives air from the air handling unit to distribute to the building

An open space between a structural concrete slab and the underside of a raised access floor system that connects to an air handling unit to receive conditioned and/or ventilating air before delivery to the room(s)

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

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

A closed, pressure vessel that uses natural gas and heat exchanger that capture and reuse any latent heat for heating water or other fluids to supply steam or hot water for heating, humidification, or other applications.

A closed, pressure vessel that uses natural gas with no system to capture latent heat for heating water or other fluids to supply steam or hot water for heating, humidification, or other applications.

A type of valve installed in a bypass pipeline

A valve installed in a bypass line of a condenser water loop

A 2-way, self contained proportional valve with an integral differential pressure adjustment setting.

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

a computer room air handler (CRAH) uses fans, cooling coils and a water-chiller system to remove heat.

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

Part of a dual duct air handling unit that supplies cooling to a building

(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 computer room air handler (CRAH) uses fans, cooling coils and a water-chiller system to remove heat.

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

A cooling tower is a heat rejection device that rejects waste heat to the atmosphere through the cooling of a water stream to a lower temperature. Cooling towers may either use the evaporation of water to remove process heat and cool the working fluid to near the wet-bulb air temperature or, in the case of closed circuit dry cooling towers, rely solely on air to cool the working fluid to near the dry-bulb air temperature.

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

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 the mixed outside and return air streams

A damper that modulates the flow of outside air

A damper that is a component of a Relief Air System, ensuring building doesn't become over-pressurised

A damper that modulates the flow of return air

A dry cooler is a fluid cooler that uses air, a relatively dry, non-liquid fluid to accomplish process cooling. (https://submer.com/submer-academy/library/dry-cooler/)

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.

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

A fan installed on the ceiling of a room for the purpose of air circulation

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

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

Fan moving outside air; air that is supplied into the building from the outdoors

A fan that is a component of a Relief Air System, ensuring building doesn't become over-pressurised

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 moving air discharged from HVAC vents

A fan that transfers air from a space to another space.

Device to remove gases from a mixture of gases or to remove solid material from a fluid

The last, high-efficiency filter installed in a sequence to remove the finest particulates from the substance being filtered

Filters air intake

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

A filter installed in front of a more efficient filter to extend the life of the more expensive higher efficiency filter

Filters return air

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

A valve that modulates the flow of chilled water

A valve that modulates the flow of condenser water

A valve regulating the flow of makeup water into a water holding tank, e.g. a cooling tower, hot water tank

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 (BEDES)

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 (BEDES)

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 (ASHRAE Dictionary)

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 cooling element made of pipe or tube that removes heat from equipment, machines or airflows that is filled with chilled 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 heating element typically made of pipe, tube or wire that emits heat that is filled with hot water.

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

A rotary heat exchanger positioned within the supply and exhaust air streams of an air handling system in order to recover heat energy

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