The MRCOOL UHK15 Universal Series 15 kW Heat Kit with Circuit Breaker is an electric heating accessory designed for compatible MRCOOL Universal Series air handlers using R-454B refrigerant systems. It provides supplemental or primary heat by converting electrical energy into warm airflow that is distributed through the air handler and ductwork. Ideal for heat pump applications, this h... https://www.partshnc.com/mrcool-universal-series-15kw-electric-heat-kit-uhk15