With reliable air conditioning units, Keystone produces consistent cooling to keep you comfortable, even on the hottest days. This 24,000 BTU window-mounted air conditioner can effectively cool rooms up to 1500 square feet with dehumidification up to 3.59 pints per hour to remove moisture from the air. Unit also comes equipped with a 16,000/13,000 supplemental heating mode, which is meant to be operated when outdoor temperatures exceed 23 degrees Fahrenheit. This mode is supplemental and NOT meant as a primary heat source. It is important to have a special 230-volt 20-amp electrical outlet for optimal operation, as this unit does not function with standard 115V household outlets. A remote is included so you can control your cooling from across the room. Money saving features include energy saver mode, sleep mode, and a programmable 24-hour timer. Keystone not only provides a 1-year warranty but ensures that you stay cool and comfortable at a cost-conscious price.