The MRCOOL MDPHK09D Universal Heat Kit 9kW is an electric supplemental heating accessory designed to enhance indoor comfort by providing additional heat during cold weather. It works by converting electrical energy into heat, delivering consistent warm airflow through compatible MRCOOL air handlers and packaged HVAC systems. Ideal for residential and light commercial applications, thi... https://www.partshnc.com/mrcool-universal-9kw-heat-kit-mdphk09d