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Paul FranciscoIndoor Climate Research & Training
Illinois Sustainable Technology Center
Retrofitting:Lessons from the Residential Market
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Windows Doors
Insulation
What People “Like”
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Windows Doors
Insulation
What is “Easy”
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Air sealing – where are the leaks?
Space conditioning – if you want to use a different technology
What is “Hard”
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Courtesy: Brian KumerCourtesy: Larry Harmon
Courtesy: Larry Harmon
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Source: Anis et al. 2013. ASHRAE Transactions.
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Metric?
In low-income weatherization, the metric is Savings-to-Investment Ratio (SIR)SIR =
Means how many times the measure will pay for itself
What Works
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Air sealing Insulation
Upgrades to high-efficiency space conditioning systems Sealing ducts outside of conditioned space
Lighting Refrigeration
What Works
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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
What Works
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Courtesy David Keefe, Vermont Energy Investment Corp.13
Positive pressure (with reference to outside)
Neutral pressure plane
Negative pressure (with reference to outside)
Stack Effect
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Routine weatherstripping and caulking Tune-ups Sealing ducts inside conditioned space
Doors Windows
What Doesn’t Work