This research evaluates passive cooling strategies—like reflective roofs and shading—to reduce heat in homes without air conditioning. Using simulations of thousands of combinations under current and future climates, it identifies optimal solutions for cities like Ottawa, aiming to protect vulnerable populations from rising heat risks due to climate change.

Older commercial buildings often use outdated “set-it-and-forget-it” air-conditioning settings that overcool air to control humidity, wasting energy. Research shows that slightly increasing these temperature set points can significantly reduce energy use while maintaining comfort. This low-cost adjustment could cut air-conditioning demand across much of the United States.