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

3. What People “Like”
Windows
Doors
Insulation

4. What is “Easy”
Windows
Doors
Insulation

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

7. Courtesy: Larry Harmon
Courtesy: Brian Kumer

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

10. What Works SIR = 𝐹𝑖𝑟𝑠𝑡−𝑦𝑒𝑎𝑟 𝑠𝑎𝑣𝑖𝑛𝑔𝑠 ∗𝑈𝑃𝑊 𝐶𝑜𝑠𝑡 Metric?
In low-income weatherization, the metric is Savings-to- Investment Ratio (SIR)
SIR = 𝐹𝑖𝑟𝑠𝑡−𝑦𝑒𝑎𝑟 𝑠𝑎𝑣𝑖𝑛𝑔𝑠 ∗𝑈𝑃𝑊 𝐶𝑜𝑠𝑡
Means how many times the measure will pay for itself

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

12. 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

13. Stack Effect Positive pressure (with reference to outside)
3/31/2017
Positive pressure (with reference to outside)
Neutral pressure plane
Negative pressure (with reference to outside)
Courtesy David Keefe, Vermont Energy Investment Corp. 13 13

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

16. Thank you!
QUESTIONS?
Paul Francisco