"220V Cooling Fan" air volume, a measure of a fan of one of the most intuitive abilities important principle, the unit is marked CFM cubic feet per minute. Noise level is another important concern of our index, although nothing to do with the heat, but also about the user can buy, the unit is dBA (decibels). The bearings are "220V Cooling Fan" soul part, the text will Bucai specific analysis. Life, that is, literally, what we did things too popular. Joints, is a fan of the more important details of components, simply ignored by us. Operating voltage planning, refers to the fan can work properly voltage range, generally cooling fan factory in Hangzhou cheap "220V Cooling Fan" about the governor, after the governor needs to adjust the voltage within the specified plan, fans enough talent normal shift.