The MRCOOL HHK-15 ProDirect Series Top-Discharge Electric Heat Kit is a supplemental heating component designed for compatible MRCOOL ProDirect air handlers and heat pump systems. It uses electric resistance heating elements to generate additional heat when the system requires supplemental heating. The top-discharge configuration supports proper installation within compatible HVAC equ... https://www.partshnc.com/mrcool-prodirect-series-top-discharge-heat-kit-hhk-15