Commercial Cool 12,000 BTU Portable Air Conditioner with Heat function features quiet operation and ample to cover a room about 500 sq. ft. This unit also features eco-friendly refrigerant and is free of any lead and mercury making it RoHS complaint. This model also features casters, a remote 24 hour timer, and a 46 in. extended window exhaust kit. See 12,000 BTU model Cool Only (Internet # 202675403) for customer reviews on this similar model.