Minneapolis Storm Window Pilot

Storm windows are relatively ubiquitous in Minnesota, often used over a single-pane window. After several decades or more, these windows can become leaky, which results in reduced benefits and creates an opportunity for storm window upgrades.

This pilot found that replacing old, leaky storm windows with new storm windows provides a significant air sealing benefit, resulting in 10–20% whole-building air leakage reduction. Additionally, new storm windows can include a low emissivity coating (Low-E) that provides even higher insulating power than clear glass storm windows.