Table 36. HES Billing Analysis Realization Rate Summary for Air Sealing and Insulation Other Model Reported Ex Reported Ex Gross Model Realization Savings as Ante Savings as Measure Ante Savings Savings (CCF) Rate Percent of Percent of (CCF)* Pre-Usage Air Sealing 57 62 91% 5% 6% *Average ex ante savings is based on the participant sample used in the billing analysis and may vary from averages based on the program population. Simulation Modeling Results The Evaluation Team used detail provided in the utility tracking data (for each building type and heating fuel combination) to assess corresponding pre- and post-installation information for each measure analyzed using the calibrated simulation approach. Table 37 presents these details, including average pre- and post-installation insulation levels (weighted by square footage installed) and changes in air and duct-sealing levels. Table 37. HES Gas—Shell and Duct-Sealing Measure Distribution and Installation Details Average % Leakage Measure Participants* Pre-Condition Post-Condition Units Reduction Duct Sealing 1,192 522 393 25% CFM 25 Attic Insulation 383 R5 R32 n/a R-Value Wall Insulation 54 R0.5 R15.5 n/a R-Value *Count of participants reflects the number with ex ante savings reported for a given measure. The Evaluation Team used the energy models to calculate the savings percentage of weather-sensitive loads for each measure, which were then applied to pre-period, weather-sensitive usage for each model to calculate evaluated energy savings. Table 38 presents the weighted household-level gas savings for each measure and the realization rates compared to average ex ante savings, along with savings percentages of weather-sensitive loads. Table 38. HES Gas—Weighted Household Savings for Shell and Duct Measures Average Average Savings as % Average Ex Ante of Evaluated Realization Measures Savings Gross Savings Rate (CCF) Consumption (CCF) Load (CCF) Duct Sealing 45 790 2.3% 19 42% Attic Insulation 179 964 14.0% 135 76% Wall Insulation 449 801 27.9% 224 50% Differences between ex ante and evaluated savings for shell and duct sealing measures estimated using building simulation models are presented above in the HES Electric Savings section.
Table 36. HES Billing Analysis Realization Rate Summary for Air Sealing and Insulation Other Measure Gross Model Savings (CCF) Reported Ex Ante Savings (CCF)* Realization Rate Model Savings as Percent of Pre-Usage Reported Ex Ante Savings as Percent of Air Sealing 57 62 91% 5% 6% *Average ex ante savings is based on the participant sample used in the billing analysis and may vary from averages based on the program population. Simulation Modeling Results The Evaluation Team used detail provided in the utility tracking data (for each building type and heating fuel combination) to assess corresponding pre- and post-installation information for each measure analyzed using the calibrated simulation approach. Table 37 presents these details, including average pre- and post-installation insulation levels (weighted by square footage installed) and changes in air and duct-sealing levels. Table 37. HES Gas—Shell and Duct-Sealing Measure Distribution and Installation Details Measure Participants* Pre-Condition Post-Condition Average % Leakage Reduction Units Duct Sealing 1,192 522 393 25% CFM 25 Attic Insulation 383 R5 R32 n/a R-Value Wall Insulation 54 R0.5 R15.5 n/a R-Value *Count of participants reflects the number with ex ante savings reported for a given measure. The Evaluation Team used the energy models to calculate the savings percentage of weather-sensitive loads for each measure, which were then applied to pre-period, weather-sensitive usage for each model to calculate evaluated energy savings. Table 38 presents the weighted household-level gas savings for each measure and the realization rates compared to average ex ante savings, along with savings percentages of weather-sensitive loads. Table 38. HES Gas—Weighted Household Savings for Shell and Duct Measures Measures Average Ex Ante Savings (CCF) Average Consumption (CCF) Savings as % of Load Average Evaluated Gross Savings (CCF) Realization Rate Duct Sealing 45 790 2.3% 19 42% Attic Insulation 179 964 14.0% 135 76% Wall Insulation 449 801 27.9% 224 50% Differences between ex ante and evaluated savings for shell and duct sealing measures estimated using building simulation models are presented above in the HES Electric Savings section.
R16_CT%20Impact%20Eval_Volume%202_REVIEWDRAFT_05JUN14_v2.docx