With reliable air conditioning, Keystone produces consistent cooling to keep you comfortable, even on the hottest days. Whether installed in a window or through-the-wall, this 12,000 BTU / 11,000 BTU supplemental heating capacity window and wall air conditioning unit can effectively cool rooms up to 550 square feet with dehumidification up to 2.5 pints per hour to remove moisture from the air. Perfect for smaller-sized living spaces like apartments, dorm rooms, sheds, and much more. The unit features a unique remote with a thermostat built in to sense the temperature of the room, displays it on the remote's LCD screen, and sends a signal to your AC unit every 3 minutes for accurate cooling. Money saving features include energy saver mode, sleep mode, and a programmable 24-hour timer. You'll know when it's time to easily remove and clean the mesh filter with the Check Filter alert.