The MRCOOL MDPHK12D Universal Electric Heat Kit is a 12kW auxiliary heating accessory designed for use with compatible MRCOOL packaged HVAC units. It provides additional electric heat by converting electrical energy into warm airflow, helping maintain indoor comfort during colder conditions when supplemental heating is needed. Integrated directly into the packaged system, it works sea... https://www.partshnc.com/mrcool-universal-12kw-electric-heat-kit-for-packaged-units-mdphk12d