DescriptionIt also effectively improves air circulation in poorly ventilated spaces and maximizes energy efficiency. Stay cool and breathe fresher air with Sunpentown's newest 14,000 BTU Portable Air Conditioner unit. It ideally cools an area up to 500 sq. ft. Self-Evaporating Technology - during the cooling process, water is extracted from the air into the unit. Most of this water is then recycled and used to cool the cooling coils and make it run more efficiently, cooling as well as energy.