"24V DC Cooling Fan" is actually a fan of the indoor heat absorbed by evaporation and becomes steam, cooling fan is an evaporative air conditioners, can achieve the dual effect of cooling and ventilation; cooling fan is characterized by low investment, low energy consumption ; use "24V DC Cooling Fan" can not close the doors and windows, can be used in non-sealed space; do not add freon cooling fan; air-conditioning fan cooling fan cooling fan is one thing, and now has been used in air-conditioning fan countries not to call air-conditioning fan because he did not have air conditioning functions, now called "24V DC Cooling Fan" or cooling fan, home, then look at the power, the smaller the power saving, but to consider the size of your house, the chiller can only give you a certain down temperature, but not cooling, do not listen to people who sell things nonsense, refrigeration and air conditioning is necessary, but the air conditioning blowing more people is not good, but obviously cool.