The MRCOOL MHK20H Signature Series Air Handler Heat Kit with Circuit Breaker is an electric heating accessory designed for compatible MRCOOL Signature Series air handlers. It provides supplemental or primary heat by converting electrical energy into warm airflow distributed through the HVAC system. The integrated circuit breaker enhances electrical protection and simplifies installati... https://www.partshnc.com/mrcool-mhk20h