Choose excellent quality products. Since the fan industry and technology low, uneven products on the market, be sure to choose well-known brand products, so to ensure quality. "24V DC Cooling Fan" in conjunction with the use of air conditioning. "24V DC Cooling Fan" can directly convert electrical energy into kinetic energy, power consumption is very low, from the point of view of energy conservation, the use of the fan is the best choice for the summer. And the fan used in conjunction with air conditioning, air-conditioning temperature is set at about 26 degrees Celsius, power and money. Try to use the mid-range or low gear. Usually the first to open files fast, cool, slow down multi-file, you can reduce the fan's power consumption. "24V DC Cooling Fan" in the use of the best placed next to doors, windows, easy air circulation, improve the cooling effect, reducing power consumption.