The Hessaire 2，100 CFM Evaporative Cooler is compact in size， pleasing in aesthetics and the performance exceeds coolers of a much larger size. This performance is achieved through expanding air-intake areas to the hi-density XeL50 rigid media. This cooler features an ice pack loading tray that is designed to add colder bursts of air. This cooler also has 3 media panels instead of a single panel found on most mobile coolers. 3 panels allow more air-intake area and reduce pre-rotation of the air to the prop， which translates into lower static pressure and more efficient air delivery to the prop. The hi-density XeL50 media provides 80% more evaporation surface compared to regular density media. This means higher evaporation efficiency and cooler temperatures. The oscillating feature of this unit also means that more sq. ft. is covered by this unit than other units at comparable sizes. Note: This unit is NOT an air conditioner and therefore uses much less energy and saves more on electricity costs. It is best used in dry climates or open spaces. Leave window/door open to limit the rise of humidity and keep better air ventilation in the room.