absorption

Indicates a chiller which uses absorption driven by hot water (as opposed to vapor compression).

ac

Indicates an alternating current (AC) electrical quantity or device.

active

Applied to an electrical power point to indicate active power or real power, typically measured in "kW".

ahu

Air Handler Unit which heats and/or cools air.

ahuRef

Associate an entity such as a vav with an ahu.

air

Point associated with the measurement or control of air.

airCooled

Indicates chiller which uses air to cool the hot refrigerant.

angle

Indicates an angle measurement.

apparent

Applied to an electrical power point to indicate apparent power, typically measured in "kVA".

area

Floor area of a site measured in ft² or m².

avg

Indicates an average quantity.

barometric

Defines the mean atmospheric pressure at sea level measured in millibar or inHg.

blowdown

Paired with water to indicate control or measurement of the blowdown water expelled from a coolingTower or boiler to remove mineral build up.

boiler

Boiler equip used to generate hot water or steam for heating.

bypass

If used with valve indicates a by-pass in a piping system.

centrifugal

Indicates chiller compressor which uses a continuous flow of fluid through an impeller.

chilled

Marker tag used with water for the chilled water system between the plant and ahu.

chilledBeamZone

Marker for an ahu which delivers air to zones via chilled beam terminal units.

chilledWaterCool

Indicates that a unit has cooling capability using chilled water.

chilledWaterPlant

Models the entire plant and its system of equipment used to generate chilled water.

chilledWaterPlantRef

Associate a record such as an ahu with its chilledWaterPlant.

chiller

Chillers remove heat from a liquid via a vapor compression or an absorption refrigeration cycle.

circ

Indicates a pump designed to circulate a fluid through an equipment such as a boiler.

circuit

An equip which models an electric circuit housed in an elecPanel.

closedLoop

Indicates coolingTower which keeps the working fluid separate from the fluid used for heat transfer into the atmosphere.

cloudage

The fraction of the sky obscured by clouds.

cmd

Classifies a point as an output, AO/BO, command, or actuator.

co

Carbon monoxide level point measured in "ppm".

co2

Carbon dioxide level point measured in "ppm".

coldDeck

Associated with the cold air ductwork in a dualDuct or tripleDuct AHU.

condensate

Paired with water to indicate control or measurement of the condensate water in a coolingTower or boiler.

condenser

When combined with the water tag, this indicates points in a condenser water system between a chiller and coolingTower.

connection

Marker tag for a logical network connection between two devices using a specific communications protocol.

constantVolume

Marks an ahu as delivering a constant volume of air flow.

cool

Cooling coil as bool or numeric point used with ahu equip.

coolOnly

Indicates a cooling only VAV without a fan.

cooling

Associated with the cooling mode of an HVAC system.

coolingCapacity

Measurement of a chiller ability to remove heat measured in "tonref", "BTU/h", or "kW".

coolingTower

Cooling towers are used to transfer process waste heat to the atmosphere.

cur

Marker tag which indicates the point has capability for subscription to its real-time, current value.

curErr

Error message associated when curStatus indicates an error condition.

curStatus

Current status of a point curVal as one of the predefined strings

curVal

Current value of a point or other value record

current

Models a point associated with electrical current; should be paired with one of the following tags

damper

Marker tag on point which indicates a damper used to regulate or control the flow or pressure of air.

dc

Indicates a direct current (DC) electrical quantity or device.

delta

Indicates a differential of air, water, or steam between the entering and leaving sensors.

device

Models a physical device on a communication network.

device1Ref

Models the first end point device of a connection

device2Ref

Models the second end point device of a connection

dew

Defines the dew point temperature of a weather station.

directZone

Marker for an ahu which delivers air directly to a zone.

direction

Cardinal or compass direction measured in degrees

dis

Short display name for an entity.

discharge

Associated with the discharge air an ahu or vav.

diverting

Indicates a three way valve which inputs one pipe and diverts between two output pipes.

domestic

Paired with water to indicate control or measurement of tap water used for drinking, washing, cooking, and flushing of toliets.

dualDuct

Indicates an ahu which discharges into two ducts which are some combinatin of hotDeck, coldDeck, or neutralDeck.

ductArea

Config point on a vav for duct area measured in ft² or m².

dxCool

Indicates that a unit has cooling capability using direct expansion mechanical cooling.

effective

Used to indicate the effective setpoint which takes into account various other mode based setpoints the equip might define.

efficiency

Efficiency point of a chiller measured in "COP" or "kW/ton".

elec

Used on point or equip entities relating to electricity.

elecHeat

Indicates that a unit has heating capability using electric heat.

elecMeterLoad

Equip or point which consumes energy as electrial load.

elecMeterRef

Associates a piece of equipment with an elec meter.

elecPanel

An equip which models the physical housing for electric circuits.

elecPanelOf

Associates a circuit with its elecPanel.

elecReheat

Indicates a VAV with electric reheat.

enable

Secondary on/off point of an equip especially used with a vfd.

energy

Applied to point entities which measure energy consumption.

entering

Indicates water or steam entering a piece of equipment like a boiler or chiller.

enum

Comma separated list of text names to use for Bool or Str point.

equip

Equipment asset.

equipRef

Association with an equip entity.

evaporator

Indicates points on the evaporator mechanism used to convert a refrigerant from its liquid to gageous state.

exhaust

Associated with the exhaust air an ahu.

export

Models the power or energy exported to the electric grid.

faceBypass

A point of an ahu indicating air flow is by-passing the heating/cooling elements.

fan

Fan point or equip associated with an ahu, vav, or coolingTower.

fanPowered

Indicates a VAV with a fan.

fcu

Fan coil units are unitary heating/cooling assets which use the zone itself for supply air.

filter

Differential pressure across the filter of an ahu.

flow

Marker tag on a point which measures rate of volume currently flowing through a flow meter, duct, or pipe .

flue

Indicates points placed in the flue-gas stack of a boiler system.

freezeStat

A boolean point of an ahu indicating a freezing condition which might require a control sequence to protect the equipment.

freq

Electrical A/C frequency point measured in "Hz" for elec meter or a vfd.

gas

Used on point or equip entities relating to natural gas.

gasHeat

Indicates that a unit has heating capability using gas heat.

gasMeterLoad

Equip or point which consumes fuel gas as load.

geoAddr

Geographic street address.

geoCity

Geographic city or locality name.

geoCoord

Geographic coordinate as "C(latitude,longitude)"

geoCountry

Geographic country as ISO 3166-1 two letter code.

geoCounty

Geographic subdivision of US state.

geoPostalCode

Geographic postal code; for US this is a five digit zip code.

geoState

State or province name; for US this is two letter state code.

geoStreet

Geographic street number and name.

header

Header pipe used as central connection or manifold for other piping runs.

heat

Heating coil as bool or float point on an ahu or vav.

heatExchanger

Heat exchangers are used to transfer heat from one medium to another.

heatPump

Heat pumps are unitary assets which use a refrigeration cycle for both heating and cooling.

heatWheel

Bool point which models the on or off state of an ahu heat wheel.

heating

Associated with the heating mode of an HVAC system.

his

Indicates that a point is historized with a history log of timestamp/value pairs.

hisErr

Error message associated when hisStatus indicates an error condition.

hisInterpolate

Indicates how interpolation of a historized point should be handled.

hisStatus

Current status of a point history sync as one of the predefined strings

hisTotalized

Indicates values which are a continuous stream of totalization and should be read by computing the delta.

hot

Paired with water to indicate control or measurement of hot water.

hotDeck

Associated with the hot air ductwork in a dualDuct or tripleDuct AHU.

hotWaterHeat

Indicates that a unit has heating capability using hot water.

hotWaterPlant

Plant level tag for system which outputs hot water

hotWaterPlantRef

Associate an entity such as an ahu with its hotWaterPlant.

hotWaterReheat

Indicates a VAV with hot water reheat.

humidifier

Boolean or numeric point of an ahu used to indicate if if the humidifier is on or off.

humidity

Humidity measured in %RH (percent relative humidity).

hvac

Associated with HVAC (Heating, Ventilating, Air Conditioning)

id

Unique identifier for an entity.

imbalance

In electrical power systems, models an ac volt or current phase imbalance measured in "%".

import

Models the power or energy imported from the electric grid.

irradiance

Combined with solar to measure the amount of energy arriving at the earth's surface measured in W/m².

isolation

Indicates a valve or damper used to isolate a piece of equipment from a piping system or ductwork respectively.

kind

Defines a tag value type using a predefined string constant.

leaving

Indicates water or steam exiting a piece of equipment like a boiler or chiller.

level

Indicates the fill level of a tank as a percentage where 0% is empty and 100% is filled.

lightLevel

Light level sensor point under lightsGroup measured in "lux" or "lumen".

lighting

Indicates association with the lighting system.

lights

Lighting on/off status as a boolean or if dimmable a numeric between 0% and 100%.

lightsGroup

Equip level of the lighting system which is a group of one or more lights points.

load

Models a point on a chiller used to command or measure the chiller's load as a percentage from "0%" to "100%".

mag

Models the magnitude of a volt or current point.

makeup

Paired with water to indicate control or measurement of the makeup water in a coolingTower or boiler used to replace water lost through leaks, evaporation, or blowdown.

mau

Used with ahu to mark an AHU as a makeup air handling unit which conditions 100% outside air, and no recirculated air.

max

Associated with a maximum value.

maxVal

Applied to point to define the maximum value to read from a sensor or to write from a command/setpoint.

meter

Equip which meters usage of elec energy, thermal energy, gas, water or steam.

min

Associated with a minumum value.

minVal

Applied to point to define the minumum value to read from a sensor or to write from a command/setpoint.

mixed

Associated with the mixed air of an ahu.

mixing

Indicates a three way valve which inputs two pipes and outputs a mixture between the two to a single output pipe.

multiZone

Marker for an ahu which delivers air to its zones via a ductwork manifold which splits the air into a duct per zone.

net

Models the net power or energy exchange with the electric grid following the load convention: import minus export.

network

Network models a communication network between multiple devices.

networkRef

Models the network of a connection

neutralDeck

Associated with the neutral air ductwork in a dualDuct or tripleDuct AHU.

occ

Marker tag used to indicate a setpoint is associated with occupied mode.

occupancyIndicator

Occupancy sensor under lightsGroup.

occupied

Marker tag used with a boolean point to indicate whether a site or zone is occupied (true) or unoccupied (false).

oil

Used on point or equip entities relating to fuel oil.

openLoop

Indicates coolingTower which uses the working fluid itself for evaporation into the atmosphere.

outside

Associated with outside air, often used to model ahu points.

parallel

Indicates the VAV fan pulls air from outside the primary airflow.

perimeterHeat

Auxiliary heating points associated with a vav.

pf

Power factor of an elec meter as a unitless number between 0.0 and 1.0 which represents the ratio of active power to apparent power.

phase

Association of one or more phases in a three-phase electrical system.

point

Data point such as a sensor or actuator.

power

Applied to point entities which measure energy consumed per unit time.

precipitation

Amount of atmospheric water vapor fallen which includes rain, drizzle, sleet, snow, and hail measured in mm or inches.

pressure

Static pressure associated with the measurement or control of fluids such as air, oxygen, water, steam, gas, oil, etc.

pressureDependent

VAV damper modulates to control space temp.

pressureIndependent

VAV damper or a control valve that modulates to maintain desired flow setpoint, independent of the duct or piping pressure.

primaryFunction

Enumerated string applied to a site record to indicate the building's primary function.

primaryLoop

Indicates equipment and points which are associated with a chiller or boiler plant's primary loop - the pipework within the central plant.

protocol

String enumeration for a connection communication protocol.

pump

Marker tag for an equip or point which models a pump.

reactive

Applied to an electrical power point to indicate reactive power or imaginary power, typically measured in "kVAR".

reciprocal

Indicates chiller compressor which uses pistons driven by a crankshaft.

refrig

Indicates points associated with the measurment or control of the refrigerant substance in a cooling system like a chiller.

reheat

Reheat point of a vav.

reheating

Associated with the reheating mode of a VAV.

return

Associated with the return air an ahu.

rooftop

Used with ahu to mark an AHU as a packaged rooftop unit (RTU).

run

Primary on/off point of an equip especially used with a vfd.

screw

Indicates chiller compressor which uses a rotary mechanism.

secondaryLoop

Indicates equipment and points which are associated with a chiller or boiler plant's secondary loop - the pipework from the central plant to the building.

sensor

Classifies a point as an input, AI/BI, or sensor.

series

Indicates the VAV pulls air from the primary airflow.

singleDuct

Indicates an ahu which uses a single duct for all air flow.

site

Building or other type of facility with unique street address.

siteMeter

Applied to a meter which exclusively meters a single site identified by siteRef.

sitePanel

Marker tag for a elecPanel to indicate its the main site-level panel.

siteRef

Association with a site entity.

solar

Point associated with the measurement of the sunlight.

sp

Classifies a point as a setpoint, soft point, or process control variable.

speed

When used as a vfd point it is speed measured in "%" where 0% is off and 100% is the fastest speed.

stage

Indicates the stage of an AHU cooling or heating element.

standby

Marker tag used to indicate a setpoint is associated with standby mode.

steam

Point associated with the measurement or control of steam.

steamHeat

Indicates that a unit has heating capability using steam.

steamMeterLoad

Equip or point which consumes steam as load.

steamPlant

Plant level tag for system which outputs steam

steamPlantRef

Associate an entity such as an ahu with its steamPlant.

subPanelOf

Ref tag to indicate that an elecPanel is positioned underneath another panel in the electric distribution system.

submeterOf

This tag is applied to submeters and references the parent meter.

sunrise

Boolean point associated with a weather station for historizing sunrise and sunset times.

tank

Marker tag for an equip which models a storage tank vessel.

temp

Temperature measured in °C or °F.

thd

In electrical power systems, models the total harmonic distortion of a volt or current point measured in "%".

total

Indicates a total quantity.

tripleDuct

Indicates an ahu which discharges into three ducts which are the hotDeck, coldDeck, and neutralDeck.

tz

Timezone identifier string which is a city name from the zoneinfo database.

unit

Unit of measurement identifier from unit database.

unocc

Marker tag used to indicate a setpoint is associated with unoccupied mode.

uv

Unit ventilators are unitary heating/cooling assets which have direct access to outside fresh air.

valve

Marker tag on point which indicates a valve used to regulate or control the flow or pressure of a fluid.

variableVolume

Marks an ahu as delivering a variable volume of air flow.

vav

Variable Volume Volume supply duct equip.

vavMode

Enumerated Str point which specifies a VAV's operating mode as one the following standardized string values

vavZone

Marker for an ahu which delivers air to zones via vav terminal units.

vfd

Marker for a motor equip with variable frequency drive.

visibility

Distance at which light can be clearly discerned measured in km or miles.

volt

Models a point associated with electrical voltage; should be paired with one of the following tags

volume

Marker tag on a point which measures total volume which has flowed through a meter, duct, or pipe.

water

Point associated with the measurement or control of water.

waterCooled

Indicates chiller which uses water to cool the hot refrigerant.

waterMeterLoad

Equip or point which consumes water as load.

weather

Marker tag for a weather station entity.

weatherCond

Used with a Str enum point to enumerate conditions with one of the following string values

weatherPoint

Point sensor value associated with a weather station.

weatherRef

Associates an entity with a weather station.

wetBulb

Associates a point with the wet-bulb temperature.

wind

Point associated with the measurement of the wind.

writable

Annotates a point as a writable output with 16-level priority array.

writeErr

Error message associated when writeStatus indicates an error condition.

writeLevel

Current priority level for writeVal as number between 1 and 17.

writeStatus

Current status of a writable point output

writeVal

Current desired value to write to output.

yearBuilt

Tag on site which is four digit year that a building was first built.

zone

Associated with a conditioned zone of a building.