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Analysis of Weatherization Measures

This document provides an updated analysis of weatherization measures, focusing on savings methodology and associated costs, derived from the 6th Plan and Regional Technical Forum. It outlines the roles of the Council and Regional Technical Forum (RTF) in determining cost-effective weatherization limits and insulation measure savings. Key elements include the calibration of the SEEM model with billing analyses and the use of ETO program data for cost assessments of insulation and window measures. Collaboration between the Council and RTF is emphasized to ensure accurate and efficient methodologies.

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Analysis of Weatherization Measures

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  1. Analysis of Weatherization Measures Savings Methodology and Costs: Updated from 6th Plan Regional Technical Forum June 1st, 2010

  2. Savings Methodology Existing vs. New Method * Note: Upcoming slide (4) shows how cost-effective weatherization limits will be determined.

  3. Calibrating SEEM Model with Billing Analyses (from Nov 2009 RTF meeting) • Electric FAF and Zonal Electric • 66 degrees day and night • Uses the following SEEM inputs for the heating temperature setpoints: • Heat Pumps and Gas FAF • 70 degrees daytime • 64 degree night setback

  4. Defining Roles and Clearing up Confusion from Last Meeting • Under the existing method, the following were determined jointly by the Council (Tom) and by the RTF (Tom), without clearly defined roles • cost-effective insulation limits and • insulation measure savings • In the new method, since potentially significant costs are at stake, roles are defined as follows: • Council: determine cost-effective weatherization limits • RTF: determine insulation measure savings • What this means: • Council to generate and document measure optimization methodology that incorporates SEEM • Who’s on Point: Tom and Ecotope, with input from Adam and RTF • Level of effort = $$$; timeline = longer • RTF to generate and document measure savings methodology that incorporates SEEM • Who’s on Point: Adam, with input from Tom, Ecotope and RTF • Level of effort = $; timeline = shorter • (Draft calculation spreadsheet for site built single family retrofit weatherization measures attached to today’s agenda) • Both systems feed each other, so collaboration is required. • Note: Since Council portion won’t be completed soon enough for October PTR update, cost-effective weatherization limits will initially be estimated from 6th Plan analysis, and updated when available.

  5. Insulation Measure Costs • Existing Method (from 5th Plan) • Average of four sources • PSE Reported Costs • EWEB Reported Costs • Pacific PUD Reported Costs • 1996 Power Plan Costs • New Method • Median of ETO Program Data (electric) • May 2007 through July 2008 • Cost per ft2 = [Median (ETO cost/ft2/∆R)] × [∆ R]

  6. ETO Cost Data for Ceiling Insulation Median: 2.3¢/ft2/∆R

  7. ETO Cost Data for Floor Insulation Median: 4.7¢/ft2/∆R

  8. ETO Cost Data for Wall Insulation Median: 9.1¢/ft2/∆R

  9. Window Measure Costs • Used ETO Program data for Multifamily • Multifamily costs expected to best convey the cost of the efficiency improvement • Single Family costs expected to be biased high due to additional “features” • U-0.30 to U-0.25 assumed to be $2.00/ft2 • Recommend change to $1.36/ft2 per June 2009 RTF meeting decision • Gary Curtis’ research on costs for a 0.30 window package versus 0.22.

  10. ETO Data

  11. Cost Comparisons Window Replacement (Not Shown) PTR: $24.18 6th Plan: $20.07

  12. RTF Review • Updated deemed savings will be shown to RTF when complete (goal: August RTF meeting) • Any recommendations for changes to methods or data sources for savings or costs?

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