Table 16. Comparison of Ex Ante and Evaluated Gross Savings by Measure—HES Gas Reported Ex Gross Savings ante Savings Realization (CCF/ Category Measure (CCF / Rate Method Household) Household) * (B/A) (B) (A) Engineering Appliance Clothes Washer 20 2 8% Algorithm Simulation HVAC Duct Sealing 45 19 42% Modeling Heating System Engineering HVAC 1,004 229 23% Replacement Algorithm Billing Analysis Shell Air Sealing 62 57 91% (±14%) Shell Insulation Other 175 175 100% Reported Ex Ante Engineering Shell Windows 136 147 108% Algorithm Simulation Shell Insulation 179 135 76% Modeling Simulation Shell Wall Insulation 449 224 50% Modeling Water Heater Water Heat 56 56 100% Reported Ex Ante Replacement Engineering Water Heat DWH Bundle 17 14 84% Algorithm *Average ex ante savings per household are based on the program population, except for measures estimated through billing analysis, which are based on the billing analysis participant sample. Measure-Level Savings This section addresses evaluated gross savings estimates for all HES measures, covering electric, natural gas, and oil/propane fuel types. The results are grouped by fuel savings and are presented for distinct measures and/or measure categories. HES Electric Savings The billing analysis provided estimates of electric savings for several HES measure categories: lighting, ductless heat pumps, air sealing, insulation other (containing a mix of attic and wall installations), and the DHW bundle (containing showerheads, pipe insulation, and aerators). All other estimates of electric savings presented in this section were determined using engineering algorithms and simulation modeling.
Table 16. Comparison of Ex Ante and Evaluated Gross Savings by Measure—HES Gas Category Measure Reported Ex ante Savings (CCF / Household) * (A) Gross Savings (CCF/ Household) (B) Realization Rate (B/A) Method Appliance Clothes Washer 20 2 8% Engineering Algorithm HVAC Duct Sealing 45 19 42% Simulation Modeling HVAC Heating System Replacement 1,004 229 23% Engineering Algorithm Shell Air Sealing 62 57 91% Billing Analysis (±14%) Shell Insulation Other 175 175 100% Reported Ex Ante Shell Windows 136 147 108% Engineering Algorithm Shell Insulation 179 135 76% Simulation Modeling Shell Wall Insulation 449 224 50% Simulation Modeling Water Heat Water Heater Replacement 56 56 100% Reported Ex Ante Water Heat DWH Bundle 17 14 84% Engineering Algorithm *Average ex ante savings per household are based on the program population, except for measures estimated through billing analysis, which are based on the billing analysis participant sample. Measure-Level Savings This section addresses evaluated gross savings estimates for all HES measures, covering electric, natural gas, and oil/propane fuel types. The results are grouped by fuel savings and are presented for distinct measures and/or measure categories. HES Electric Savings The billing analysis provided estimates of electric savings for several HES measure categories: lighting, ductless heat pumps, air sealing, insulation other (containing a mix of attic and wall installations), and the DHW bundle (containing showerheads, pipe insulation, and aerators). All other estimates of electric savings presented in this section were determined using engineering algorithms and simulation modeling.
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