The MRCOOL MVPHK15 is a 15 kW electric heat kit designed for compatible VersaPro and Hyper Heat 2nd Gen central ducted air handlers using R-454B systems. It works by converting electrical energy into supplemental heat through resistance heating elements, providing additional warmth when heat-pump capacity is insufficient. The kit is compatible with 24K through 60K VersaPro central duc... https://www.partshnc.com/mrcool-15kw-heat-kit-mvphk15