Airrex spot coolers operate in air temperatures from 65°F to 104°F. These air conditioners utilize eco-friendly R-410A refrigerant. Airrex spot cooler air conditioners may require a fresh air supply for proper operation. Includes removable, washable air filters for easy maintenance. Theremostatically protected compressor includes high and low pressure warnings. Moves easily on swivel casters (2 locking). 5" diameter front cold air discharge and 10" diameter top warm air discharge.