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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

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Thank you!

QUESTIONS?

Paul Francisco244-0667

pwf@illinois.edu