AUTOCAD ACRONYMS ABBREVIATIONS

A - compressed air line or area

ABC - above ceiling

AC - air chamber, alternating current

A/C - air conditioning

AFF - above finished door

AFG - above finished grade

AL - aluminium

AMB - ambient

AMP - amphere

ARR - arrangement

ATC - automatic temperature control, at ceiling

ATM - atmosphere

AUTO - automatic

AUX - auxiliary

AVG - average

BBD - boiler blowdown

BF - boiler feed

BHP - boiler horsepower, brake horsepower

BOD - bottom of duct

BOP - bottom of pipe

BOT - bottom

BP - back pressure

B & S - bell-and-spigot

BSMT - basement

BTU - british thermal unit

BV - butterfly valve

oC - degrees celcius

C - condensate line

C to C - center to center

CA - compressed air

CAL - calorie

CAP - capacity

CD - condensate drain

CF - chemical feed, cubic foot

CFH - cubic feet per hour

CFM - cubic feet per minute

CI - cast iron

CIRC - circular

CL - center line

CM - centimeter

CM2 - square centimeter

CO - clean out

COL - column

CONC - concrete, concentric

CONN - connect, connection

CONT - continuation

CPVC - chlorinated polyvinyl chloride

CR - condenser return

CRW - chemical resistant waste

CS - condenser supply

CTR - center

CU - cubic

CU FT. - cubic feet

CU IN. - cubic inches

CV - check valve

CW - cold water

CWR - cold water riser

D - drain, deep

DB - dry bulb

DDC - direct digital control

DEG - degree

DELTAT - temperature difference

DET - detail

DIA - diameter

DISC - disconnect

DN - down

DP - dew point temperature

DR - drain

DWG - drawing

EA - exhaust air, each

EAT - entering temperature

E to C - end to center

EER - energy efficient ratio

EFF - efficiency

EJ - expansion joint

EL - elevation

ELB - elbow

ELEC - electrical

ENT - entering

ESP - external static pressure

ET - expansion tank

EVAP - evaporator

EWT - entering water temperature

EXH - exhaust

EXP - expansion

EXST - existing

EXT - external

oF - degrees fahrenheit

F - fahrenheit

FC - flexible connector, flexible connection

FCO - floor cleanout

FD - floor drain

FDW - feed water

FEC - fire extinguisher cabinet

FF - finish floor

FG - finish grade

FHC - fire hose cabinet

FLA - full load amps

FLR - floor

FM - flow meter

FO - fuel oil

FOV - flush out valve

FPM - feet per minute

FPS - feet per second

FS - flow switch, federal specs

FT - foot, feet

FTG - fitting

FU - fixture unit

FV - flush valve

G - gram, gas line

GA - gauge

GAL - gallons

GALV - galvanized

GL.V - globe valve

GND - ground

GPD - gallons per day

GPH - gallons per hour

GPM - gallons per minute

GPS - gallons per second

GR - grain

GV - gate valve

GWH - gas water heater

H2O - water

HB - hose bibb

HD - head

Hg - mercury

HGT - heigth

HMD - humidity

HORIZ - horizontal

HP - horsepower

HR - hour

HTD - heated

HTR - heater

HW - hot water

HWH - hot water heater

HWR - hot water return, hot water riser

HWS - hot water supply

HWT - hot water tank

HZ - herts

ID - inside diameter

IN. - inch

INHg - inches of mercury

INSUL - insulation

INT - international

INTL - internal

IPS - iron pipe size

IV - indirect vent

IW - indirect waste

J - joule

K - kelvin

KG - kilogram

KM - kilometer

KM2 - square kilometer

KPA - kilopascal

KS - kitchen sink

KW - kilowatt

L - length, liter

LAT - leaving air temperature

LB. - pound

LBF - pound-force

LIQ - liquid

LP - low pressure

LRA - locked rotor amps

LVL - level

LVR - louver

LWT - leaving water temperature

M - meter

M2 - square meter

M TYPE - lightest type of rigid copper pipe

MAN - manual

MAT - mixed air temperature

MAX - maximum

MBH - thousand british thermal units per hour

MFR - manufacturer

MG - milligram

MGD - millions gallons per day

MIN - minimum or minute

ML - milliliter

MM - millimeter

MM3 - cubic millimeter

MPT - male pipe thread

MTD - mounted

MU - make up

NA - not applicable

NC - normally closed

NEG - negative

NIC - not in contact

NO - normally open

NPHP - name plate horsepower

NPS - nominal pipe size

NPSH - net positive suction head

NTS - not to scale

O - oxygen

OA - outside air

OAT - outside temperature

OC - on center

OD - outside diameter

OED - open end duct

OF - overflow

OV - outlet velocity

OZ. - ounce

PA - pascal

PC - plumbing contractor

PCR - pumped condensate return

PD - pressure drop

PF - power factor

PG - pressure gauge

PL - plate

PNEU - pneumatic

PRESS - pressure

PROP - propeller

PRV - pressure reducing valve

PSI - pounds per square inch

PSIA - pound per suare inch absolute

PSIG - pound per square inch gauge

PV - plug valve

QTY - quantity

RA - return air

RAD - radius

RAT - return air temperature

RD - roof drain

R/E - return and exhaust

RECOV - recovery

RED - reducer

REF - reference

RH - relative humidity

REQD - required

REV - revision

RL - refrigerant liquid

RM - room

RS - refrigerant suction

RTN - return

RV - relief valve

S - switch

SA - shock absorber, supply air

SAT - supply air temperature

SCH - schedule

SDT - saturated discharge temperature

SEC - seconds, secondary

SENS - sensible

SEP - separate

SEQ - sequence

SER - series

SERV - service

SF - service factor

SHT - sheet

SI - international systems of units

SOL - solenoid

SP - static pressure

SPEC - specification

SQ. - square

SQ.FT. - square feet

SS - stainless steel

SSH - static suction head

SST - saturated suction temperature

STD - standard

STH - static total head

STL - steel

SUCT - suction

SPLY - supply

SV - service

SVH - static velocity head

SW - service weight

SWS - service water

TD - temperature difference

TDH - total dynamic head

TEMP - temperature

TH - termometer

THK - thick

TP - total pressure

TSP - total static pressure

UF - under floor

UH - unit heater

V - vent, volt, volume

VAC - vacuum

VAV - variable air volume

VB - vacuum breaker

VCI - vacuum cleaning inlet

VCL - vacuum cleaning line

VEL - velocity

VERT - vertical

VIB - vibration

VOL - volume

VSD - variable speed drive

VP - velocity pressure

VTR - vent thru roof

W - watt, wudth, wide

WB - wet bulb

WCO - wall cleanout

WG - water gauge

WH - water heater