The MRCOOL DIY-36-HP-WMAH-230C25 DIY 4th Gen 36K BTU Ductless Mini-Split Air Handler is an indoor HVAC unit engineered for use with compatible MRCOOL DIY 4th Gen ductless mini-split heat pump systems operating on 208-230V/60Hz. It works by circulating cooled or heated air supplied by the outdoor condenser to maintain consistent indoor comfort throughout the year. Ideal for large rooms... https://www.partshnc.com/mrcool-diy-4th-gen-wall-mount-air-handler-diy-36-hp-wmah-230c25