MRCOOL MHK20PB VersaPro Packaged Unit Heat Kit 20kW is an electric heating accessory designed to provide supplemental or emergency heat for compatible packaged HVAC systems. It works by using high-efficiency electric resistance heating elements to generate warm air, which is distributed through the packaged unit to maintain comfortable indoor temperatures during cold weather. Designed... https://www.partshnc.com/mrcool-versapro-packaged-unit-heat-kit-mhk20pb