The MRCOOL MHK20U Universal Air Handler Heat Strip is a 20 kW electric heating accessory designed to provide supplemental heat for compatible air-handler systems. It works by using electric resistance heating elements to generate heat, which is distributed through the air handler’s airflow to maintain comfortable indoor temperatures. Equipped with an integrated circuit breaker, it is ... https://www.partshnc.com/mrcool-20-kw-universal-air-handler-heat-strip-with-circuit-breaker-mhk20u