The MRCOOL UHK20 Universal Series Heat Kit with Circuit Breaker is an electric heating accessory designed to provide supplemental or emergency heat for compatible MRCOOL Universal Series air handlers. It works by converting electrical energy into heat, which is distributed through the air handler to maintain comfortable indoor temperatures during cold weather. The integrated circuit b... https://www.partshnc.com/mrcool-universal-series-20kw-heat-kit-uhk20