The MRCOOL MDPHK-20 Universal DC Inverter Packaged Unit Heat Kit 20KW is a high-capacity electric heating accessory engineered to provide supplemental heat for compatible MRCOOL Universal DC Inverter packaged HVAC systems. It works by converting electrical energy into heat, which is distributed through the unit's airflow to maintain consistent indoor comfort during colder conditions. Designed for residential and light commercial applications, this heat kit enhances heating performance, ensures reliable temperature control, supports efficient system operation, and offers an effective solution for maintaining comfort when additional heating capacity is required.