Scanfrost Classic Air Cooler SFAC 4000 is a cooling device that offers you fresh air and has proved to be very reliable during hot weather conditions. It has three airflow modes that blow air at a very high speed to keep a big room well ventilated and cool all day long. The air cooler works very well for a crowded room like an event hall, conference room and more. No more feeling uncomfortable because of heat waves as the room or hall is choky.