Window-Mounted Heat Pumps Offer Lowest-Cost Solution to Decarbonize Multifamily Buildings, According to ACEEE Study

The ATMOsphere Podcast Network · Jul 30, 2025 · 5m

Window-mounted heat pumps offer the lowest cost solution to decarbonize large multifamily buildings using fossil fuel central heating systems, according to a new study from the American Council for an Energy-Efficient Economy (ACEEE).“Each building will have unique opportunities, but our analysis indicates a potential order to investigate options,” said Steven Nadel, Executive Director of ACEEE and the study’s lead author. “In most cases, the three heat pump options with the lowest life-cycle costs (window, mini-split and central air-to-water heat pumps) should be considered, with the best…