Saving heat for a frosty day: OSU-AAON research rethinks heat-pump defrost
Aug 31, 2026
On a cold, damp winter day, a heat pump can face a surprising paradox: to keep a building warm, it may first have to cool it. The reason is frost. As a heat pump pulls heat from cold outdoor air, moisture can freeze on the outdoor coil. That frost
College of Engineering, Architecture and TechnologyCEATSchool of Mechanical and Aerospace EngineeringCenter for Integrated Building Systems