The Hessaire 1,300 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. The hi-density XeL50 media provides 80% more evaporation surface compared to regular density media. This means higher evaporation efficiency and cooler temperatures. 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.