... , ventilation cooling,humidifying -80%energy saving JH perfect industry humidifier (dehumidifier,humidity), lowest cost, ventilation cooling,humidifyingItem30APAirflow(m3/h ... protectionyes *100% fresh air from outside.*80% dust filter efficiency.*Vent cooling, you can leave doors and windows ... perfect for outdoor cooling more than ventilation and humidifier, it is also industrial air conditioner