"220V AC Cooling Fan" affect the cooling effect of wind, noise, price (to be considered static pressure, balance, environmental temperature, temperature control, etc.) size affect the price, noise (need to consider the installation to size, etc.) affect the price of life, reliability (need to consider the design life, the environment, etc.) "220V AC Cooling Fan" bearing the impact of price, reliability, should fully consider the actual use of the environment (to be considered high temperature, humidity, vibration, dust, dust, noise, etc. ) in the design and selection, if the supplier intervention could have fit, considering various "220V AC Cooling Fan" proposal would make the design simplification, but also did not like a lot of engineers to design a device can not be found or shortage, thereby shortening development cycles, reduce costs and improve reliability.a