1.Fan with humidifier 2.Purify air, freshen air,decrease dust 3.Long ... PrincipleThe mist fan was designed with the advanced principle of double atomization. The water drips are ... , arenas, airports, bus stations, large gatherings, hotels cooling.dust extraction: farm, mine factory, etc. humidification: ... courses by adding liquid disinfectant into water. 24" Split Style Wall Mounted Air Cooling Fan