How to select Waterproof Cooling Fan?

"Waterproof Cooling Fan" fan the first choice for consumers to understand their choice of the chassis is 12cm, 14cm or bigger fan, fan size increases will bring more significant shock effect. "Waterproof Cooling Fan" recommend consumers choose more 12 or 14cm fan more affordable. Both the size of the cooling fan in addition, can also have a good acoustics. Overall in the purchase of  "Waterproof Cooling Fan", as long as the value of wind pressure, air flow and noise of these three main factors, and fit their own situation, condemnation, we can play the biggest role of a fan.