Champion-Essick WCM28 Evaporative Cooler, 4 gal Tank, 2-Speed, 115 V, 5.5 A, Cool Sand

These fully assembled UL listed American-made evaporative window coolers are economical units that provide high performance. They can help lower indoor temperatures by as much as 15 to 20 deg F in dry, arid climates. Evaporative window coolers have low maintenance costs and use 75% less electricity than traditional AC units.