Definition of Terms BtuHcool = Rated cooling capacity of the energy efficient unit in BtuHcool EERbase = Efficiency rating of the baseline unit. EERee = Efficiency rating of the energy efficiency unit. CF = Demand Coincidence Factor (See Section 1.5) EFLHcool = Equivalent Full Load Hours for the cooling season The kWh – during the entire operating season divided by the kW at design conditions. Table : Variables for HVAC Systems Component Type Value Source BtuH Variable Nameplate data (AHRI or AHAM) Data Gathering EDC’s EERbase Variable New Construction or Replace on See Table 3102 to Table 3104 Burnout: Default values from Table 3102 to Table 3104 Early Replacement: Nameplate data Data Gathering EDC’s EERee Variable Nameplate data (AHRI or AHAM) Data Gathering EDC’s CF Fixed 55% 1 Based on Logging, BMS data or Data Gathering EDC’s Modeling EFLHcool Variable Default values from Table 3105 See Table 3105 Sources: C&I Unitary HVAC Load Shape Project Final Report, KEMA, 2011. The study reports CF values in the range of 44% to 63% depending on the size of the unit for the Mid Atlantic PJM hours. The study, therefore, assumes an average CF value of 55% for the PJM peak demand period that is applied to all units. Table below lists the minimum federal efficiency standards for room air conditioners (effective as of June 1, 2014) and minimum ENERGY STAR efficiency standards for RAC units of various capacity ranges and with and without louvered sides. Units without louvered sides are also referred to as the units or units. Note that the new federal standards are “through wall” “built-in” based on the Combined Energy Efficiency Ratio Metric (CEER), which is a metric that incorporates energy use in all modes, including standby and off modes. Also, as of October 1, 2013 ENERGY STAR Room Air Conditioner Version 3.0 will take effect.
Definition of Terms BtuHcool = Rated cooling capacity of the energy efficient unit in BtuHcool EERbase = Efficiency rating of the baseline unit. EERee = Efficiency rating of the energy efficiency unit. CF = Demand Coincidence Factor (See Section 1.5) EFLHcool = Equivalent Full Load Hours for the cooling season – The kWh during the entire operating season divided by the kW at design conditions. Table : Variables for HVAC Systems Component Type Value Source BtuH Variable Nameplate data (AHRI or AHAM) EDC’s Data Gathering EERbase Variable New Construction or Replace on Burnout: Default values from Table 3102 to Table 3104 See Table 3102 to Table 3104 Early Replacement: Nameplate data EDC’s Data Gathering EERee Variable Nameplate data (AHRI or AHAM) EDC’s Data Gathering CF Fixed 55% 1 EFLHcool Variable Based on Logging, BMS data or Modeling EDC’s Data Gathering Default values from Table 3105 See Table 3105 Sources: C&I Unitary HVAC Load Shape Project Final Report, KEMA, 2011. The study reports CF values in the range of 44% to 63% depending on the size of the unit for the Mid Atlantic PJM hours. The study, therefore, assumes an average CF value of 55% for the PJM peak demand period that is applied to all units. Table below lists the minimum federal efficiency standards for room air conditioners (effective as of June 1, 2014) and minimum ENERGY STAR efficiency standards for RAC units of various capacity ranges and with and without louvered sides. Units without louvered sides are also referred to as “through the wall” units or “built-in” units. Note that the new federal standards are based on the Combined Energy Efficiency Ratio Metric (CEER), which is a metric that incorporates energy use in all modes, including standby and off modes. Also, as of October 1, 2013 ENERGY STAR Room Air Conditioner Version 3.0 will take effect.
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