The MRCOOL MDPHK-10 Electric Heat Kit is an HVAC heating accessory designed to provide supplemental or emergency heat for compatible MRCOOL air handlers and heat pump systems. It works by converting electrical energy into heat, which is distributed through the air handler to maintain comfortable indoor temperatures during cold weather or when additional heating is needed. Commonly use... https://www.partshnc.com/mrcool-10kw-electric-heat-kit-mdphk-10