The MRCOOL MVPHK20 VersaPro 2nd Gen Heat Kit is a 20 kW electric heating accessory designed for compatible VersaPro air-handler systems using R-454B refrigerant. It operates through electric resistance heating elements that generate supplemental heat and distribute it through the air handler to maintain comfortable indoor temperatures. This heat kit is used with compatible MRCOOL Vers... https://www.partshnc.com/mrcool-20kw-heat-kit-mvphk20