The scanfrost air cooler SFAC 4000 is an innovative cooling device that has proved to be very effective in hot weather conditions like ours. It has a fan that blows at a very high speed to keep a big room well ventilated and cool all day long. It works very well for a crowded room as well. No more feeling uncomfortable because of heat waves and stuffy room. It is very powerful, rugged and very easy to control. It has three speed controls,castor wheel ice, and a chamber that allows for more cooling and also a 30 liter water tank capacity for effective cooling. It has a dust filter that takes out all the dust in a room, leaving your room clean with fresh air.