This powerful， commercial Evaporative Air Cooler is the perfect choice to effectively cool large areas. Air coolers do not use compressors， which means no harsh chemicals and low energy consumption. This air cooler features 1062 CFM and 3-sided air vents with honeycomb cooling pad for maximum airflow. Offers the option to connect to standard garden hose for continuous water supply and eliminate the trouble of manual refill. Equipped with easy-roll casters， the unit can be moved and used where ever it’s needed. For patio use， avoid water and rain exposure. When not in use， unplug the unit from the power socket and store it indoors. The Air Cooler works by endothermic reaction (a reaction that consumes heat)， so this evaporative Air Cooler sucks air through a wick saturated with water. As the air flows through the wick， some of the water evaporates into the air， consuming the heat that was in the air. An air stream is then blown out the front of the unit and is considerably cooler than the current room temperature. This is not an air conditioner and therefore uses much less energy.