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Comparison Evaporative air cooler is not an air conditioner, as it does not use a compressor and Freon gas. We could not expect an Evaporative Cooler works as effectively as refrigerated air conditioner. However, compared with air conditioner the advantages of the Evaporative Air Cooler are: Low purchasing cost Low power consumption Low installation cost Low maintenance cost Green, energy-saving, eco-friendly Windows and doors can be kept open Multifunctional: Air cooling, ventilation, humidification, purifier Widely used in indoor and outdoor applications ... COMPARISON WITH OTHER COOLING & VENTILATION DEVICES Comparison with Air Conditioner