MRCOOL MHK07B Signature Series Modular Blower Heat Strip with Circuit Breaker is an electric heating accessory designed to provide supplemental or emergency heat for compatible modular blower and air handler systems. It works by using integrated heating elements to convert electrical energy into warm airflow, while the built-in circuit breaker helps protect the system from electrical ... https://www.partshnc.com/mrcool-signature-series-7-5-kw-heat-kit-mhk07b