Appendix 7.2 Decoding of Manufacturer Model Numbers

1 Decoding OF Manufacturer Model NUMBERSLIST OF TABLEST able Furnace Model Number Model Number Model Number Model Number Model Number Model Number Standard Model Number Non-Condensing Model Number Condensing Model Number Furnace Model Number Model Number Decoding OF Manufacturer Model NUMBERSThe Department used Manufacturer Model Numbers , among other furnace characteristics, todetermine nominal airflow capacity. Manufacturers often code furnace specifications into their modelnumbers. This Appendix illuminates the furnace specifications from Manufacturer Model Amana Model number is as an example of how manufacturers code furnace characteristics.

2 Table shows the Amana Model number GUID045CA30. The first row of the table shows themodel number broken into eight cells. The fifth, sixth, and seventh characters of the Model number aregrouped together. The tenth and eleventh characters are grouped together. The second row gives anexplanation for each character or group of characters. Row three deciphers the character or group. Deciphering the Model number shows that this Amana furnace Model is an upflow gas furnace withinduced draft, a nominal output of 45K Btuh, that it is not NOx certified, and has an airflow capability ofthree Furnace Model Number DescriptionGUID045CA30 ProductTypeSupply TypeFurnaceTypeModelFeaturesNominalInput DesignSeriesAdditionalFeaturesAirflowCap abilityG: GasFurnaceU: UpflowI: InducedDraft (80%)D: AirCommand80 SV(Category IVenting)045: 45,000 BtuhC: ThirdSeriesA:StandardUnit (notNOxcertified)30: 3 TonsAll manufacturers have similar coding schemes for their furnace Model Numbers .

3 Tables show Model Numbers from the major manufacturers and an explanation of their Model Number Description58 WAV04515008 Furnace Series Configuration/TypeInput Capacity (btu/h)Series NumberNominal Cooling Size (Airflow)(400 CFM per 12,000 btu/h)58 WAV = High Efficiency InducedCombustion Upflow Furnace045 = 44,000070 = 66,000091 = 88,000111 = 110,000136 = 132,000155 = 154,00008 = 800 CFM12 = 1200 CFM14 = 1400 CFM16 = 1600 CFM20 = 2000 Model Number DescriptionN9MP2075F12A#BrandIdentifierM odelIdentifierInstallationConfigurationM ajor DesignFeatureHeatingInput(mbtu/h)Cabinet Width (inches)CoolingAirflowMarketingDigitEngi neering = Non-Brand Specific(Generic)T = Tempstar8 = Non-Condensing9 = CondensingMP = MultipositionUP = UpflowDN = DownflowUH = Uplfow/HorizontalHZ = HorizontalDH = Downflow/Horizontal1 = One pipe2 = Two pipeD = 1 or 1 pipeL = Low NoxN = Single StageP PVC VentT = Two StageV = Variable SpeedB = "J = "F = "L = "08 = 80012 = 120014 = 140016 = 160020 = 2000 DenotesminorchangeDenotesminorchangeTabl e Model Number DescriptionGMNT0403 Unit TypeInput Capacity (Btu/h)Nominal Cooling Capacity(tons)

4 GMNT = Multi-position gas furnace040 = 40,000 Btu/h3 = 3 tonsTable Model Number DescriptionG40UH24A045 XUnit TypeSeriesConfigurationNominal Add-On CoolingCapacityCabinetWidthHeating Input(btu/h)CA emissionrequirementsG = GasFurnace40 = Merit Series 80%50 = Elite 80%60 = 2-stage 80%UH = Upflow/HorizontalDF = Downflow/Horizontal24 = 2 Tons36 = 3 Tons48 = 4 Tons60 = 5 TonsA = 14-1/2B = 17-1/2C = 21D = 24-1/2045 = 44,000070 = 66,000090 = 88,000110 = 110,000135 = 132,000155 = 154,000X = meetsCaliforniaNOx standardsTable Model Number DescriptionG1N80AH100D20B1 AProductFamilyFurnace TypeNominalAFUES eriesConfigurationHeatingInput x1000(btu/h)

5 MotorTypeNominalMaximumCFM x100 CabinetWidthLow NOxModelSeries1N = Single StageHeat, Non-Direct Vent1D = Single Stage Heat,Direct Vent2D = Two Stage Heat,Direct VentH = HorizontalU = UpflowT = Upflow/HorizontalR = Downflow/HorixontalD = DirectDriveA = 13-1/2B = 17C = 20-1/2L = Standard Model Number DescriptionTUY080R9V3V0 BrandIdentifierFurnaceConfigurationTypeH eatingInput(mbtu/h)Major DesignChangePowerSupplyandFuelAirflowCap acity forCooling(400 CFM/Ton)MinorDesignChange orServiceDigitT = TraneA = AmericanStandardU = Upflow/HorizontalD = Downflow/HorizontalC = CondensingD = Induced DraftE = ElectronicIgnitionX = Direct VentCondensingY = Direct VentCondensing VariableSpeedC = Single StageR = Two-StageAll other =Standard system115 Volt/NaturalGas3 = 3 TonsV3 = 1 -3 Tons,Variable SpeedMotor (ICM)V4 = 2 - 4 Tons,Variable SpeedMotor (ICM)V5 = 3 - 5 Tons,Variable SpeedMotor (ICM)

6 H = Upflow/HorizontalV = VariableSpeed MotorTable Non-Condensing Model Number DescriptionRGPJ07 EAUERB randIdentifierFuel TypeNon-CondensingFurnace TypeDesign SeriesHeatingInput(kbtu/h)IgnitionType VariationsBlowerSizeCoolingDesignation(C FM)Natural GasFuel CodeR = RheemU = RuudW =WeatherkingG = NaturalGasD = UpflowL = DownflowP = Upflow/HorizontalJ = AcclaimA = AcclaimIIK = AcclaimII Plus 2L = AcclaimII Plus 2 LXE04 = 4505 = 5006 = = 7510 = 10012 = 12515 = 150E =ElectricIgnitionN =ElectricIgnition -NOx ModelA =StandardB= WideCabinetU = 11x6M = 11x7R = 11x10S = 500-1200E = 1100-1300G = 1450-1750J = 1900-2075R = USA = CanadaTable Condensing Model Number DescriptionRGTJ07 EMAESB randIdentifierFuel TypeCondensingFurnaceTypeDesign SeriesHeatingInput(kbtu/h)IgnitionType BlowerSizeVariationsCoolingDesignation(C FM)

7 Natural GasFuel CodeR = RheemU = RuudW =WeatherkingG = NaturalGasT = Downflow/HorizontalR = UpflowM = UpflowModulating J = Classic 90A = Classic 90 PlusD = Classic 90 PlusModulating04 = 4506 = 6007 = 7509 = 9010 = 10512 = 120E =ElectricIgnitionN =ElectricIgnition - (Low NOx)M = 11x7R = 11x10Z = 12x11 Y = 12x7A =StandardB= WideCabinetC =Single/Multi ZoneE = 1100-1300G = 1500-1700J = 1900-2100K = 600-1200M = 1200-2000S = USB = Furnace Model Number DescriptionP4 HUA12N03201 FurnaceConfigurationCabinet Size WidthDesign SeriesOutput Capacity(btu/h)HU = UpflowHorizontalA = 14-1/2B = 17-1/2C = 21D = 24-1/212 = 1200 CFM16 = 1600 CFM20 = 2000 CFM032 =32,000 Table Model Number DescriptionG6RA144C20 CFurnaceFuel TypeDesignSeriesFurnace TypeFurnace ConfigurationHeating Input(btu/h)

8 CertificationTypeNominal CFMC abinetWidthG, FG,KG, L =Gas6 or 1R = ResidentialT = Residential, two-stageA = UpflowC = Upflow, CondensingK = DownflowL = Downflow,condensing045 = 45,000060 = 60,000072 = 72,000096 = 96,000120 =120,000144 =144,000C = US/CanadaN = NOx US08 = 800 CFM12 = 1200 CFMV = VariableSpeedA = 14-1/4B = 19-3/4C = 22-1/2 The Department used this information along with product literature and installation manuals todevelop a detailed database of furnace characteristics for models that are currently being sold. Thedatabase is available on the DOE website at.