What does a positive pressure fan do?

A positive pressure fan is designed to blow fresh air into a structure, which is essential for effective ventilation during firefighting or other emergency situations. By introducing fresh air, the fan helps to displace smoke and toxic gases, thereby making the environment more survivable for any occupants and safer for rescue operations. This influx of air can also help lower temperatures within the structure by improving air circulation.

The focus of a positive pressure fan is to create a flow of air that pushes out the contaminated air, enhancing visibility and reducing the risks associated with smoke inhalation. In contrast, other fan types may function differently, either by exhausting air or creating a negative pressure environment, which is not the case with a positive pressure fan.