The MRCOOL MHK15P Signature Series Packaged Unit Heat Strip is an electric heating accessory designed to provide supplemental heating for compatible MRCOOL Signature Series packaged HVAC units. It operates by converting electrical energy into heat, which is delivered through the packaged system to maintain consistent indoor temperatures during colder weather. Ideal for heat pump appli... https://www.partshnc.com/mrcoolr-signature-series-heat-kit-mhk15p