Fan stall is an unstable aerodynamic condition that occurs when a fan operates at too little airflow for the pressure it is attempting to produce. Under these conditions, airflow separates from the blade surfaces, reducing the fan’s ability to generate pressure and move air efficiently. Stall can produce noise, vibration, pressure fluctuations, poor airflow, and
The Unseen Pressure Problem & Targeted Micro-Zones
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
