Why makeup air is essential for ventilation performance, comfort, and pressure balance. Every exhaust fan installed in a warehouse removes air from the building. Unless that air is intentionally replaced, the facility can become negatively pressurized. Negative pressure often reveals itself in unexpected ways. Exterior doors become difficult to open or close, drafts appear around
Out with the Bad Air: Exhaust Ventilation Strategies
How roof ventilators, wall exhaust fans, and panel fans remove the contaminants that air mixing alone cannot. Air mixing helps equalize temperatures throughout a warehouse, but it does not remove heat, humidity, dust, fumes, or stale air from the building. Once warm air, moisture, or airborne contaminants have been circulated, they must be exhausted outdoors.
