The MRCOOL MHK07H Signature Air Handler Heat Strip with Circuit Breaker is an electric heating accessory designed for compatible MRCOOL air handler systems. It works by using electric resistance heating elements to generate supplemental heat, which is distributed through the air handler to maintain comfortable indoor temperatures during colder conditions. The integrated circuit breake... https://www.partshnc.com/mrcool-signature-heat-kit-mhk07h