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Retrofitting: Lessons from the Residential Market

Retrofitting: Lessons from the Residential Market. Paul Francisco Indoor Climate Research & Training Illinois Sustainable Technology Center. What People “Like”. Windows Doors Insulation. What is “Easy”. Windows Doors Insulation. What is “Hard”. Air sealing – where are the leaks?

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Retrofitting: Lessons from the Residential Market

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  1. Retrofitting:Lessons from the Residential Market Paul Francisco Indoor Climate Research & Training Illinois Sustainable Technology Center

  2. What People “Like” • Windows • Doors • Insulation

  3. What is “Easy” • Windows • Doors • Insulation

  4. What is “Hard” • Air sealing – where are the leaks? • Space conditioning – if you want to use a different technology

  5. Courtesy: Larry Harmon Courtesy: Brian Kumer Courtesy: Larry Harmon

  6. Source: Anis et al. 2013. ASHRAE Transactions.

  7. What Works • Metric? • In low-income weatherization, the metric is Savings-to-Investment Ratio (SIR) SIR = • Means how many times the measure will pay for itself

  8. What Works • Air sealing • Insulation • Upgrades to high-efficiency space conditioning systems • Sealing ducts outside of conditioned space • Lighting • Refrigeration

  9. What Works • Primary goal should be to have the thermal and pressure boundary aligned • Air seal first • Then insulate • Air leakage is like having the windows open

  10. Courtesy David Keefe, Vermont Energy Investment Corp. Stack Effect Positive pressure (with reference to outside) Neutral pressure plane Negative pressure (with reference to outside) 13

  11. What Doesn’t Work • Routine weatherstripping and caulking • Tune-ups • Sealing ducts inside conditioned space • Doors • Windows

  12. Thank you! QUESTIONS? Paul Francisco 244-0667 pwf@illinois.edu

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