hvac abbreviations

30/01/2012 HVAC Abbreviations

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HVAC Abbreviations

Some commonly used standard HVAC abbreviations

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A - compressed air line or areaABC - above ceilingAC - air chamber, alternating currentA/C - air conditioningAFF - above finished doorAFG - above finished gradeAL - aluminiumAMB - ambientAMP - amphereARR - arrangementATC - automatic temperature control, at ceilingATM - atmosphereAUTO - automaticAUX - auxiliaryAVG - averageBBD - boiler blowdownBF - boiler feedBHP - boiler horsepower, brake horsepowerBOD - bottom of ductBOP - bottom of pipeBOT - bottomBP - back pressureB & S - bell-and-spigotBSMT - basementBTU - british thermal unitBV - butterfly valveoC - degrees celciusC - condensate lineC to C - center to centerCA - compressed airCAL - calorieCAP - capacityCD - condensate drainCF - chemical feed, cubic footCFH - cubic feet per hourCFM - cubic feet per minuteCI - cast ironCIRC - circularCL - center lineCM - centimeter

CM2 - square centimeterCO - clean outCOL - columnCONC - concrete, concentricCONN - connect, connectionCONT - continuationCPVC - chlorinated polyvinyl chlorideCR - condenser returnCRW - chemical resistant waste

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• Thermodynamics

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Convert Units

Temperature

0

oC

oF

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Gas Pipe

Pipe Diameter



CS - condenser supplyCTR - centerCU - cubicCU FT. - cubic feetCU IN. - cubic inchesCV - check valveCW - cold waterCWR - cold water riserD - drain, deepDB - dry bulbDDC - direct digital controlDEG - degreeDELTAT - temperature differenceDET - detailDIA - diameterDISC - disconnectDN - downDP - dew point temperatureDR - drainDWG - drawingEA - exhaust air, eachEAT - entering temperatureE to C - end to centerEER - energy efficient ratioEFF - efficiencyEJ - expansion jointEL - elevationELB - elbowELEC - electricalENT - enteringESP - external static pressureET - expansion tankEVAP - evaporatorEWT - entering water temperatureEXH - exhaustEXP - expansionEXST - existingEXT - externaloF - degrees fahrenheitF - fahrenheitFC - flexible connector, flexible connectionFCO - floor cleanoutFD - floor drainFDW - feed waterFEC - fire extinguisher cabinetFF - finish floorFG - finish gradeFHC - fire hose cabinetFLA - full load ampsFLR - floorFM - flow meterFO - fuel oilFOV - flush out valveFPM - feet per minuteFPS - feet per secondFS - flow switch, federal specsFT - foot, feetFTG - fittingFU - fixture unitFV - flush valveG - gram, gas lineGA - gaugeGAL - gallonsGALV - galvanizedGL.V - globe valveGND - groundGPD - gallons per dayGPH - gallons per hourGPM - gallons per minuteGPS - gallons per secondGR - grainGV - gate valveGWH - gas water heater

Convert!

Length

1

m

km

in

ft

yards

miles

nautical miles

Convert!

Volume

1

m3

liters

in3

ft3

us gal

Convert!

Velocity

1

m/s

km/h

ft/min

ft/s

mph

knots

Convert!

Pressure

1

Pa (N/m2)

bar

mm H2O

kg/cm2

psi

inches H2O

Convert!

Flow

1

m3/s

m3/h

US gpm

cfm

Convert!

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H2O - water

HB - hose bibbHD - headHg - mercuryHGT - heigthHMD - humidityHORIZ - horizontalHP - horsepowerHR - hourHTD - heatedHTR - heaterHW - hot waterHWH - hot water heaterHWR - hot water return, hot water riserHWS - hot water supplyHWT - hot water tankHZ - hertsID - inside diameterIN. - inchINHg - inches of mercuryINSUL - insulationINT - internationalINTL - internalIPS - iron pipe sizeIV - indirect ventIW - indirect wasteJ - jouleK - kelvinKG - kilogramKM - kilometer

KM2 - square kilometerKPA - kilopascalKS - kitchen sinkKW - kilowattL - length, literLAT - leaving air temperatureLB. - poundLBF - pound-forceLIQ - liquidLP - low pressureLRA - locked rotor ampsLVL - levelLVR - louverLWT - leaving water temperatureM - meter

M2 - square meterM TYPE - lightest type of rigid copper pipeMAN - manualMAT - mixed air temperatureMAX - maximumMBH - thousand british thermal units per hourMFR - manufacturerMG - milligramMGD - millions gallons per dayMIN - minimum or minuteML - milliliterMM - millimeter

MM3 - cubic millimeterMPT - male pipe threadMTD - mountedMU - make upNA - not applicableNC - normally closedNEG - negativeNIC - not in contactNO - normally openNPHP - name plate horsepowerNPS - nominal pipe sizeNPSH - net positive suction headNTS - not to scaleO - oxygenOA - outside air

HydrocarbonEngineering

Manutenzione

EngineeringStandards



OAT - outside temperatureOC - on centerOD - outside diameterOED - open end ductOF - overflowOV - outlet velocityOZ. - ouncePA - pascalPC - plumbing contractorPCR - pumped condensate returnPD - pressure dropPF - power factorPG - pressure gaugePL - platePNEU - pneumaticPRESS - pressurePROP - propellerPRV - pressure reducing valvePSI - pounds per square inchPSIA - pound per suare inch absolutePSIG - pound per square inch gaugePV - plug valveQTY - quantityRA - return airRAD - radiusRAT - return air temperatureRD - roof drainR/E - return and exhaustRECOV - recoveryRED - reducerREF - referenceRH - relative humidityREQD - requiredREV - revisionRL - refrigerant liquidRM - roomRS - refrigerant suctionRTN - returnRV - relief valveS - switchSA - shock absorber, supply airSAT - supply air temperatureSCH - scheduleSDT - saturated discharge temperatureSEC - seconds, secondarySENS - sensibleSEP - separateSEQ - sequenceSER - seriesSERV - serviceSF - service factorSHT - sheetSI - international systems of unitsSOL - solenoidSP - static pressureSPEC - specificationSQ. - squareSQ.FT. - square feetSS - stainless steelSSH - static suction headSST - saturated suction temperatureSTD - standardSTH - static total headSTL - steelSUCT - suctionSPLY - supplySV - serviceSVH - static velocity headSW - service weightSWS - service waterTD - temperature differenceTDH - total dynamic headTEMP - temperature



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TH - termometerTHK - thickTP - total pressureTSP - total static pressureUF - under floorUH - unit heaterV - vent, volt, volumeVAC - vacuumVAV - variable air volumeVB - vacuum breakerVCI - vacuum cleaning inletVCL - vacuum cleaning lineVEL - velocityVERT - verticalVIB - vibrationVOL - volumeVSD - variable speed driveVP - velocity pressureVTR - vent thru roofW - watt, wudth, wideWB - wet bulbWCO - wall cleanoutWG - water gaugeWH - water heater

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Codes and Standards - Piping codes and standards - ASME, ANSI, ASTM, AGA, API, AWWA, BS, ISO, DINand more..Documentation - Documentation of process control systems - Block Flow Diagrams (BFD), Process FlowDiagrams (PFD), Piping and Instrumentation Diagrams (P&ID) and more

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