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Deemed Measure Update: REVISITED Heat Pumps (Weatherization, Duct Sealing)

Deemed Measure Update: REVISITED Heat Pumps (Weatherization, Duct Sealing). Single Family Existing Homes Regional Technical Forum August 3 rd , 2010. Revisions to Analysis presented at June 29 th Meeting Average House Size increased for Heat Pump measures 2,157 ft 2 instead of 1,602 ft 2

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Deemed Measure Update: REVISITED Heat Pumps (Weatherization, Duct Sealing)

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  1. Deemed Measure Update:REVISITEDHeat Pumps (Weatherization, Duct Sealing) Single Family Existing Homes Regional Technical Forum August 3rd, 2010

  2. Revisions to Analysis presented at June 29th Meeting • Average House Size increased for Heat Pump measures • 2,157 ft2 instead of 1,602 ft2 • Distinction made for Heat Pump Sizing (June 29th values reflect 3 tons for each prototype) • PTCS: Balance Point = 30 degrees • Standard Practice: Undersized by 17% • Based on 2005 Regional Heat Pump Study findings • Heat Pump Measures Re-categorized • All are now additive (June 29th had “HP Conversions” combined with C&C) • Conversions are 7.7 HSPF/13 SEER; • Upgrades are 8.5 HSPF/14 SEER and 9.0/14 SEER, and now include 8.2 HSPF/13 SEER • Commissioning and Controls (C&C) is now Commissioning & Controls & Sizing(C&C&S) • Proper sizing is part of the PTCS specs; without proper sizing, C&C would be at risk of causing comfort issues • Conversion and Upgrade costs now based on HVAC contractor bids (Mark Jerome) (June 29th used a poor fitting regression of ETO program data) Results Summarized • Heat Pump measure savings changed • C&C&S savings are significantly higher than C&C; Still a very cost-effective measure. • Conversion savings went down; All are cost-effective. • Upgrade savings went down; 8.5 and 9.0’s are not cost-effective, 8.2’s are. • Heat pump related Weatherization and Duct Sealing savings increased slightly

  3. Measure Costs and Sizing Details Bids from Mark Jerome Prototype Weightings, Sizing Results

  4. June 29th Values Note: Cooling Zone 2 is shown for “Current RTF savings”

  5. Revised Values Note: Cooling Zone 2 is shown for “Current RTF savings”

  6. Decision – PTCS C&C&S • Measures were adopted at June 29th meeting for C&C, but savings and costs now calculated to include sizing to PTCS standards. • Proposal is for PTCS C&C&S measures to replace the C&C measures adopted in June. • Accept revised values to replace June 29th decision?

  7. June 29th Values Reminder: The June 29th analysis included C&C w/conversions

  8. Revised Values Reminder: The revised analysis does not include C&C w/conversions; avg. house size is larger; standard practice heat pump is smaller; HPSF/SEER is now 7.7/13 not 8.5/14

  9. June 29th Values • Note: ProCost rounds to the nearest 0.1 of a B/C ratio.

  10. Revised Values

  11. Decision – Heat Pump Conversions • Accept New Deemed Measures for Single Family Heat Pump Conversions? • Measure Life = 20 years • Same as previous

  12. June 29th Values

  13. Revised Values Reminder: The revised analysis assumes a “standard practice” sized heat pump (smaller); larger house size

  14. June 29th Values

  15. Revised Values

  16. Decision – Heat Pump Upgrades • Accept New Deemed Measures for Single Family Heat Pump Upgrades? • Measure Life = 20 years • Same as previous

  17. June 29th Values Note: “Electric Heat” = Weighted Average Electric Heating System Type Note: Current RTF Savings shown are for Cooling Zone 1 (Cooling Zones 2 and 3 are also deemed)

  18. Revised Values Note: Per June 29th meeting, measure cost changed from regression results ($518) to median ($538) of ETO data [average = $605].

  19. Decision – PTCS Duct Sealing • Accept New Deemed Measures for Single Family PTCS Duct Sealing? • Measure Life = 20 years • Same as previous

  20. June 29th Values

  21. Revised Values

  22. June 29th Values

  23. Revised Values

  24. June 29th Values

  25. Revised Values

  26. June 29th Values

  27. Revised Values

  28. June 29th Values

  29. Revised Values

  30. June 29th Values

  31. Revised Values

  32. Decision – SF Wx • Measures were adopted at June 29th meeting, but savings for “average” and “heat pump” heating system types changed slightly. • Accept revised values?

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