The MRCOOL UHK10 Universal Series Heat Kit is a 10kW electric heating accessory designed for compatible R-454B Universal Series air handlers. It uses electric resistance heating elements to generate supplemental heat, which the air handler’s blower distributes throughout the conditioned space. This kit is compatible with MRCOOL UAH18024-O, UAH18030-O, UAH18036-O, UAH18048-O, and UAH18... https://www.partshnc.com/mrcool-universal-series-10kw-heat-kit-uhk10