Table : Variables for HVAC Systems Component Type Value Source BtuHfuel Variable Nameplate data (AHRI or AHAM) EDC Data Gathering Nameplate data (AHRI or AHAM) BtuHheat Variable EDC Data Gathering Default: set equal to BtuHfuel Early Replacement: Nameplate data EDC Data Gathering New Construction or Replace on COPbase Variable Burnout: Default values from Table See Table 3120 3120 Early Replacement: Nameplate data EDC Data Gathering New Construction or Replace on HSPFbase Variable Burnout: Default values from Table See Table 3120 3120 Default = >= 95% (natural gas/propane furnace) >= 95% (natural gas/propane steam boiler) >= 95% (natural gas/propane hot ENERGY STAR requirement AFUEfuel Variable water boiler) >= 85% (oil furnace) >= 85% (oil steam boiler) >= 85% (oil hot water boiler) Nameplate data (AHRI or AHAM) EDC Data Gathering Based on Logging, EMS data or EDC Data Gathering Modeling Default values from Table 3121 EFLHheat Variable See Table 3121 Table 3121 HPmotor Variable Default = ½ hp for furnace Average blower motor capacity for gas furnace (typical range = ¼ hp to ¾ hp) Nameplate EDC Data Gathering Variable Default = 0.50 for furnace Typical efficiency of ½ hp ηmotor blower motor for gas furnace Nameplate EDC Data Gathering Sources: The Equivalent Full Load Hours (ELFH) for Pennsylvania are calculated based on the degree day scaling methodology. The EFLH values reported in the Connecticut Program Savings Documentation were adjusted using full load hours (FLH) from the US DOE
Table : Variables for HVAC Systems Component Type Value Source BtuHfuel Variable Nameplate data (AHRI or AHAM) EDC Data Gathering BtuHheat Variable Nameplate data (AHRI or AHAM) Default: set equal to BtuHfuel EDC Data Gathering COPbase Variable Early Replacement: Nameplate data EDC Data Gathering New Construction or Replace on Burnout: Default values from Table 3120 See Table 3120 HSPFbase Variable Early Replacement: Nameplate data EDC Data Gathering New Construction or Replace on Burnout: Default values from Table 3120 See Table 3120 AFUEfuel Variable Default = >= 95% (natural gas/propane furnace) >= 95% (natural gas/propane steam boiler) >= 95% (natural gas/propane hot water boiler) >= 85% (oil furnace) >= 85% (oil steam boiler) >= 85% (oil hot water boiler) ENERGY STAR requirement Nameplate data (AHRI or AHAM) EDC Data Gathering EFLHheat Variable Based on Logging, EMS data or Modeling EDC Data Gathering Default values from Table 3121 Table 3121 See Table 3121 HPmotor Variable Default = ½ hp for furnace Average blower motor capacity for gas furnace (typical range = ¼ hp to ¾ hp) Nameplate EDC Data Gathering ηmotor Variable Default = 0.50 for furnace Typical efficiency of ½ hp blower motor for gas furnace Nameplate EDC Data Gathering Sources: The Equivalent Full Load Hours (ELFH) for Pennsylvania are calculated based on the degree day scaling methodology. The EFLH values reported in the Connecticut Program Savings Documentation were adjusted using full load hours (FLH) from the US DOE
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