The MRCOOL MHK05B Signature Series Modular Blower Heat Kit with Circuit Breaker is an electric heating accessory designed to provide supplemental or emergency heat for compatible MRCOOL Signature Series modular blower air handlers. It works by converting electrical energy into heat, which is distributed through the blower system to maintain comfortable indoor temperatures. The integra... https://www.partshnc.com/mrcoolsignature-heat-kit-5-kw-modular-blower-heat-strip-mhk05b