1.Fan with humidifier 2.Purify air, freshen air,decrease dust 3. ... temperature, improves the relative humidity and reduces the dust. 2. Work EnvironmentVoltage --- if the main voltage is unstable, ... , stadiums, arenas, airports, bus stations, large gatherings, hotels cooling.dust extraction: farm, mine factory, etc. humidification: textile mills ... into water. Water-proof Water Spray Mist Cooling Fan