The first is "Waterproof Cooling Fan" air regulation, air conditioning is the use of an air conditioner or the end of the device to the delivery room air continuously or intermittently to maintain a certain temperature difference between the heat and moisture balance and temperature and humidity requirements of the room. When cooled to send the amount of cooling load at equilibrium, "Waterproof Cooling Fan" accuracy depends only on the number of air temperature and ventilation. The smaller the supply air temperature difference, the more the number of ventilators, the smaller the temperature gradient and the volatility, the higher the precision air conditioning. Closely related to this is the "Waterproof Cooling Fan" industry, which affects the use of the air conditioning effect, whether ventilation can achieve the best results, but also on the proper use of the fan, the fan made of existing air conditioning not very good, many issues are not well adjusted as a result of air caused.