The MRCOOL MVPHK10 VersaPro 2nd Gen Heat Kit 10kW is an electric auxiliary heating accessory designed to enhance the heating performance of compatible MRCOOL VersaPro air handlers and heat pump systems. It works by generating supplemental electric heat when outdoor temperatures drop or when additional heating capacity is needed, helping maintain consistent indoor comfort. https://www.partshnc.com/mrcool-versapro-10kw-heat-kit-mvphk10