The MRCOOL MCAEHWD7X1AA Signature Series 7.5 kW Heat Kit is an electric supplemental heating accessory designed for compatible MRCOOL Signature Series stud-mount air handlers using R454B refrigerant systems. It works by converting electrical energy into heat, providing additional warmth that is distributed through the air handler and connected ductwork. This heat kit is suitable for H... https://www.partshnc.com/mrcoolr-signature-series-heat-kit-mcaehwd7x1aa