1 The power consumption of air conditioner is high. It is up to 10 kw/h for one hundred square meters cooling, however, the power consumption of evaporative air cooler only needs 1.2 kw/h in the same area.

2 Closed cooling by air conditioner will cause air pollution, however doors and windows are open with use of evaporative air cooler, ventilation effect is good.

3 The cost of evaporative air cooler is only equal to 60% of central air conditioner.

4 Freon is used by the central air conditioner, it also wastes a lot of energy and pollutes the environment. However, evaporative air cooler is used by water evaporative cooling.

5 Evaporative air cooler can lower the air temperature about 5 to 12 degrees Celsius, but fan has no cooling function.

6 It will achieve overall cooling by evaporative air cooler £¬but fan is only to be used for ventilation in part area.