Negative Pressure Ventilation (NPV) Fan
It works by lowering the air pressure inside a space, essentially "sucking" the smoke out.
Place the fan right in the heart of the smoke-filled area to push the smoke outward, while firefighters set up a fresh air inlet on the opposite side. This creates a powerful, unbroken airflow that sweeps every last bit of smoke away.
This fan is a go-to tool for all kinds of firefighting scenarios, especially when natural ventilation or positive pressure ventilation just won't cut it. It's a game-changer for fires in underground parking lots, tunnels/stations, and basements, where smoke tends to get trapped.
With accessories like positive-negative pressure ducts, you can turn a positive pressure ventilation fan into a smoke exhaust system for enclosed spaces like basements.
