In order to ensure safety, the membrane building is generally equipped with two main fans, which are backup to each other.

When fresh air is needed in the building, the two fans can operate simultaneously to meet the oxygen needs of a large number of people in the room, such as sports events;

In general, a fan is enough to maintain the normal operation of the membrane building.

The fan sends fresh air to the air-film building through the air duct, which can make the air in the building fresh at any time.