The MRCOOL MHK15B Signature Series Modular Blower Heat Kit with Circuit Breaker (15 kW) is an electric heat kit designed to provide reliable supplemental heating for compatible MRCOOL Signature Series air handlers and modular blower systems. It works by converting electrical energy into heat, which is distributed through the blower to deliver consistent indoor comfort during colder co... https://www.partshnc.com/mrcool-signature-heat-kit-mhk15b