Measure of a "220V Cooling Fan" quality, the most important aspects of performance and life, followed by more and more noise at work is concerned; in addition, whether related to work, we must also pay attention to the specifications of the fan power. And closely related to the data base size too wind area (bottom area minus the fan frame and the motor occupies part of the area occupied by the results), then further affected the "220V Cooling Fan" key performance indicators "wind." Has a larger base size, usually you can get bigger over the wind area, in the wind speed equal, the greater amount of wind; conversely consideration, you can reduce the wind speed does not reduce the amount of wind, a "large caliber" Fan is one of the big trends in the development of the current air-cooled radiator. Increase "220V Cooling Fan" is highly beneficial to increase the fan power, increase the fan area, can enhance the performance of the fan; Some fans will take advantage of the increased height to add baffles or change direction in the plane of rotation of the fan frame (ie non-axial fan) and so on.