DeLonghi PAC290 Portable Air Conditioner Exhausts warm, humid air through window, door, wall, or ceiling Adjustable window bracket, 51-inch exhaust hose, semi-permanent installation kit Electronic room thermostat and 24-hour programmable timer Cools 16-by-16-foot room with 8-foot ceiling; uses ordinary, 110-volt current 22 inches wide, 28-3/4 inches high, 16-3/8 inches deep; weighs 97 pounds Fully portable on sturdy casters and operating on ordinary, 110-volt household current, this air conditioner cools a room up to 16 by 16 feet (with an 8-foot ceiling) by exhausting warm, humid air by means of a flexible 51-inch hose. It comes with an adjustable 4-foot window bracket that the hose fits through. Or the hose can be placed in a 3-1/2-inch-diameter hole in a door, wall, or ceiling (bracket included). The air conditioner is energy efficient because it operates entirely inside--unlike a window air conditioner, which uses hot and/or humid outside air to cool its condenser. Filled with water, it features a "Super Cool" setting for operating at its full 8,500-Btu capacity for 8 hours, and it operates indefinitely at 88 percent (or 7,500 Btu) of capacity even when it's dry. It has a two-speed fan and can be left on around the clock thanks to an electronic thermostat that turns the unit on and off to maintain a selected comfort level and to a 24-hour timer that can be programmed to turn the unit on and off at selected times. To dehumidify a room, the unit collects about 51 pints of moisture from the air in 24 hours. In a patented process, it then employs that moisture to enhance the cooling cycle, exhausting excess through the hose and eliminating the need to empty a water-condensation receptacle.