Use this Maxx Air 18 in. Variable Speed Evaporative Cooler for 900 sq. ft in a barn, warehouse and factory, auto shop, or restaurant patio to make people and animals as comfortable as possible. Our evaporative coolers are constructed with a rugged polyethylene housing, industrial-duty aluminum fan blades, and metal angle support bars that make it perfect for open spaces where cooling with an air conditioner is challenging. This cooler is easy to maintain and has low operational costs thanks to the energy-efficient pump and motor. Roll it from location to location using the straight and swivel caster wheels. This unit is designed to lower the ambient temperature in areas up to 900 sq. ft. by as much as 26°F without air conditioning and can be connected to a direct water line or used with the 25 gal. reservoir for independent use.Manufacturer Warranty covers parts only and does not cover whole units, labor, or returned shipping. Manufacturer Warranty covers manufacture defects and does not cover any damages or defects due to personal harm or misuse