... air cooler Advantages: 1.low running and operating costs 2.fresh, healthy and cool air 3.energy saving ... ,one unit can cover 130 square meters ,but just use 1 kw /hour,just 1/8 of the air ... CFCs,totally environmentally friendly. Evaporative cooler cool the outside air temperature withthe directly evaporative cooling, ... units40-feet container38 units Energy-saving Air Cooler