An evaporative cooler from Grainger uses the cooling effect produced when water turns into vapor to cool larger areas where a typical air conditioning unit is impractical and cost prohibitive. These evaporative coolers cool warehouses, factories, loading docks and large indoor arenas as large as 10,000 sq. ft. Find belt-driven, direct and pneumatic evaporative cooler options that will lower temperatures by 15 Degrees to 25 Degrees at 4000 to 7500 cfm.