The MRCOOL MHK15U Universal Air Handler Heat Strip 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 colder conditions. The integra... https://www.partshnc.com/mrcool-15-kw-universal-air-handler-heat-strip-with-circuit-breaker-mhk15u