100+ HVAC Acronyms And Abbreviations At One Place: Collective Guide

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Yes, We understand your excitement if you belong to the industry like Heating, ventilation, and air conditioning (HVAC) then this must be a golden piece for you, just because here we collect more than 100+ acronyms and abbreviations related to HVAC…no no we say HVAC: Heating, ventilation, and air conditioning, why use the short form when the whole post is about abbreviations. 😛 😛

So here we go with the list from A to Z. Final scope tries to collect almost all but we are always welcome if you suggest some more or if we missed out any. So now have a look and hit the comment section if you have any abbreviations related to HVAC in your bucket.

A

A	compressed air line or area
AC	Air Conditioning
ACD	Automatic Control Damper
ACH	Air Changes per Hour
ACM	Asbestos Containing Material
AD	Access Door
AEE	Association of Energy Engineers
AF	Air Foil
AFD	Adjustable Frequency Drive
AFUE	Annual Fuel Efficiency Ratio
AHU	Air Handling Unit
AI	Analog Input
AMP	Ampere
AO	Analog Output
AP	Access Panel
APD	Air Pressure Drop
AS	Air Stream
ASHRAE	American Society of Heating Refrigeration and Air Conditioning Engineers
ATC	Automatic Temperature Control
ATM	Atmosphere

B

B	Boiler
BACnet	A Data Communication Protocol for Building Automation and Control Networks
BAS	Building Automation System
BCA	Building Commissioning Association
BDD	Back-Draft Damper
BHP	Brake Horsepower
BI	Backward Incline
BO	Binary Output
BOD	Bottom of Duct
BSLN	Baseline
BTU	British Thermal Unit
BTUH	Brtish Thermal Units / Hour
BY	Base Year

C

CAV	Constant Air Volume
CD	Cold Deck
CDD	Cooling Degree Days
CEM	Certified Energy Manager
CENT	Center or Centrifugal
CF	Cubic Feet
CFC	ChloroFluoroCarbon
CFM	Cubic Feet per Minute
CH	Chiller
CHW	Chilled Water
CHWP	Chilled Water Pump
CHWR	Chilled Water Return
CHWRT	Chilled Water Return Temperature
CHWS	Chilled Water Supply
CHWST	Chilled Water Supply Temperature
CLF	Cooling Load Factor
CLTD	Cooling Load Temperature Difference
CO	Carbon Monoxide
CONN	Connection
COP	Coefficient Of Performance
CRAC	Computer Room Air Conditioner
CT	Cooling Tower
CTBD	Cooling Tower Blow Down
CUH	Cabinet Unit Heater
CV	Constant Volume
CVRMSE	Coefficient of Variation of the Root Mean Square of the Error
CWP	Condenser Water Pump
CWR	Condenser Water Return
CWRT	Condenser Water Return Temperature
CWS	Condenser Water Supply
CWST	Condenser Water Supply Temperature
CY	Current Year

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D

D	Drain
DA	Discharge Air
DB	Data Base
DC	Direct Current
DCV	Demand Controlled Ventilation
DD	Degree Day
DDC	Direct Digital Control
DEG	Degree
DH	Duct Heater
DI	Digital Input
DIA	Diameter
DIM	Dimension
DO	Digital Output
DP	Dew Point
DX	Direct Expansion

E

EA	Each or Exhaust Air
EAHU	Exhaust Air Handling Unit
EAT	Entering Air Temperature
ECM	Electronically Commutated Motor
ECO	Energy Conservation Opportunity
EDH	Electric Duct Heater
EEM	Energy Efficiency Measure
EER	Energy Efficiency Ratio
EF	Exhaust Fan
EH	Electric Heater
EMER	Emergency
EMS	Energy Management System
ESCO	Energy Service Company
ESP	External Static Pressure
ET	Expansion Tank
EUH	Electric Unit Heater
EWT	Entering Water Temperature
EXH or EX	Exhaust
EXP	Expansion
EXT	External

F

F	Fahrenheit
FA	Free Area or Fire Alarm
FC	Forward Curve
FCU	Fan Coil Unit
FD	Floor Drain, Fire Damper, or Fire Department
FIM	Facility Improvement Measure
FLA	Full Load Amps
FLEX	Flexible
FLRDR	Floor Drain
FMS	Facility Management System
FPM	Feet Per Minute
FPS	Feet per Second
FRP	Fiberglass Reinforced Plastic
FS	Flow Switch
FT	Feet
FTR	Fin Tube Radiation
FW	Feed Water

G

G	Gas
GA	Gauge
GAL	Gallons
GALV	Galvanized
GFU	Glycol Feed Unit
GPH	Gallons per Hour
GPM	Gallons Per Minute
GR	Grade
GUI	Graphical User Interface

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H

HB	Hose Bib (Connection)
HCFC	Hydrochlorocfuorocarbon
HD	Hot Deck
HDD	Heating Degree Days
HEPA	High Efficiency Particulate Arresting
HFC	HydroFluoroCarbon
HHV	Higher Heating Value
HHWP	Heating Hot Water Pump
HHWR	Heating Hot Water Return
HHWS	Heating Hot Water Supply
HL	High Limit
HP	Horsepower or High Point
HPS	High Pressure Steam
HR	Heat Recovery
HRU	Heat Recovery Unit
HRV	Heat Recovery Ventilator
HSPF	Heating Seasonal Performance Factor
HTG	Heating
HVAC	Heating Ventilation and Air Conditioning
HWP	Hot Water Pump
HWR	Hot Water Return
HWRT	Hot Water Return Temperature
HWS	Hot Water Supply
HWST	Hot Water Supply Temperature
HX	Heat Exchanger
HZ	Hertz (Cycles per Second)

I

I/O	Input Output
IAQ	Indoor Air Quality
ID	Inside Diameter
IN	Inches
IPMVP	International Performance Measurement and Verification Protocol
IR	Infra-Red

K

Kilowatt

L

LAT	Leaving Air Temperature
LB	Pound
LD	Linear Diffuser
LF	Linear Feet
LHV	Lower Heating Value
LL	Low Limit
LON	Local Operating Network
LP	Low Pressure
LPS	Low Pressure Steam
LRA	Locked Rotor Amps
LUVR or LVR	Louver
LVDR	Louvered Door
LVG	Leaving
LWBT	Leaving Wet Bulb Temperature
LWT	Leaving Water Temperature

M

M&V	Measurement and Verification
MA	Mixed Air
MAT	Mixed Air Temperature
MAX	Maximum
MBH	1000 BTUH
MCA	Minimum Circuit Amps
MCC	Motor Control Center
MD	Motorized Damper
MECH	Mechanical
MIN	Minimum
MU	Make-Up Water
MUA	Make-up Air Unit
MX	Metrix Utility Accounting System
MZ	Multi-Zone

N

NC	Normally Closed
NEMA	National Electrical Manufacturers Association
NO	Normally Open
NOM	Nominal
NPSH	Net Positive Suction Head

O

OA	Outside Air
OAI	Outside Air Intake
OAP	Outside Air Percentage
OAT	Outside Air Temperature
OC	On Center
OD	Outside Diameter
ODP	Open Drip Proof
OV	Outlet Velocity
OWS	Operator Work Station

P

PC	Performance Contracting
PCF	Pounds per Cubic Foot
PD	Pressure Drop
PE	Professional Engineer
PH	Pre-Heat
PID	Proportional Integral Derivative
PRV	Pressure Relief Valve
PSI	Pounds per Square Inch
PSIA	Pounds per Square Inch – Absolute
PSID	Pounds per Square Inch – Differential
PSIG	Pounds per Square Inch – Gauge
PTAC	Packaged Terminal Air Conditioner
PVC	Polyvinyl Chloride

R

R	Radius
RA	Return Air
RET	Return
RF	Return Fan
RH	Reheat
RLA	Running Load Amps
RLF	Relief
RPM	Revolutions Per Minute
RTD	Resistance Temperature Detector
RTU	Roof Top Unit

S

SA	Supply Air
SAT	Supply Air Temperature
SC	Shading Coefficient
SCR	Screen
SCT	Saturated Condensing Temperature
SD	Smoke Detector or Smoke Damper
SE	Smoke Exhaust
SEER	Seasonal Energy Efficiency Ratio
SEN	Sensible
SF	Supply Fan
SFD	Combination Smoke / Fire Damper
SHC	Sensible Heat Capacity
SHFG	Solar Heat Gain Factor
SHR	Sensible Heat Ratio
SP	Set Point
SS	Stainless Steel
SUP	Supply
SWP	Steam Working Pressure

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T

T	Temperature
TEFC	Totally Enclosed Fan Cooled
TEMP	Temperature
TEV	Thermostatic Expansion Valve
TOD	Time Of Day
TON	12,000 BTUH (Cooling Capacity)
TORR	Millimeter of Mercury (mmHg)
TSP	Total Static Pressure
TSTAT	Thermostat
TXV	Thermostatic Expansion Valve
TYP	Typical

U

UC	Undercut (Door)
UH	Unit Heater
UV	UltraViolet

V

V	Volts
VAV	Variable Air Volume
VD	Volume Damper
VEL	Velocity
VFD	Variable Frequency Drive
VSD	Variable Speed Drive
VSP	Variable Speed Pump(ing)

W

WB	Wet Bulb
WC	Water Column
WG	Water Gauge
WPD	Water Pressure Drop
WTD	Water Temperature Difference

Y

YTD	Year To Date

A

B

C

D

E

F

G

H

I

K

L

M

N

O

P

R

S

T

U

V

W

Y

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