When choosing a swamp cooler, it is important to note the unit's air moving capacity, as well as installation and maintenance requirements. Some swamp coolers may require more maintenance than portable air conditioners such as replenishing the water supply, draining the unit, and cleaning the cooling pads. At any rate, the most important benefit of an evaporative cooler is that it can efficiently cool an area, using only a third of the amount of electricity of conventional air conditioners. Overall, evaporative cooling provides significant savings in comparison to refrigerated cooling air units. Evaporative coolers are made using a simplistic design, therefore they are very low maintenance. Welcome to our new website for more new products informations. www.greencoolings.com