The Koldfront 18,500 BTU Heat/Cool Window Air Conditioner(WAC18001W) can service a space up to 1,000 square feet with cool air during the warm summer months and heat during the winter. The air conditioner has 18,500 BTUs of cooling power and 16,000 BTUs of electric heating power. Using the electronic thermostat and digital display, you can set your desired temperature as well as control other convenient features like the energy saver mode, fan speed and 24 hour timer. The WAC18001W is able to provide both supplemental cooling and heating for a space up to 1,000 square feet. Full two-year warranty so you can rest comfortably. Operate the temperature setting and fan speed from anywhere in the room with the convenient remote control. To save energy, sleep mode will adjust the temperature periodically before returning to the set temperature after 6 hours. This function cycles the fan on for two minutes at 10 minute intervals and will turn the compressor back on if the the room temperature exceeds the set temperature. Fits windows between 31 & 42 inch wide; Minimum window height: 19.5 inch; Dimensions: 17.9″ H x 26″ W x 30″ D; Weight: 117 lbs.