Avoiding stall requires treating the fan and the connected duct system as one aerodynamic system. 1. Select the fan for a stable operating point Start with accurate system requirements, including: Required airflow range. Total or static pressure, with the basis clearly identified. Air temperature, density, and composition. Filter and coil loading. Minimum, normal, and maximum
Fan Stall: What it is
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
Protecting the Perimeter – Air Curtains & Loading Docks
How air curtains help reduce heat loss, humidity infiltration, dust, insects, and outdoor air entering through frequently opened warehouse doors. Even a well-designed ventilation system can struggle when warehouse doors are opened repeatedly throughout the day. Loading docks, receiving areas, shipping bays, and forklift entrances can allow large amounts of outside air to enter the
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.
Beat the Heat & Stratification
Why destratification is the first step toward a more comfortable and energy-efficient warehouse. Are you aware that a building’s temperature increases, on average, between 0.5 and 1 degree F for every elevated foot that heat rises? On a 20-foot ceiling, there can be a 10 to 20 degree variance in temperature from the floor to
Air Curtains and Facility Climate Control
Part three of three-part series: Ventilation Strategies for Manufacturing Heat, Humidity & Air Movement Air curtains are a simple but highly effective way to help control heat and humidity at building openings. By creating a moving barrier of air across a doorway or other opening, they reduce the exchange of indoor and outdoor air, which
Humidity Control Through Ventilation in Manufacturing Facilities
Part two of three-part series: Ventilation Strategies for Manufacturing Heat, Humidity & Air Movement Managing indoor humidity is one of the most effective ways to improve working conditions in manufacturing facilities. When ventilation is used correctly, it helps remove moisture-laden air, stabilize indoor conditions, and reduce the comfort and performance problems that come with excessive
Ventilation Strategies for Manufacturing: Heat, Humidity & Air Movement
This three-part series explores practical ways manufacturing facilities can improve indoor conditions while keeping operations efficient and costs under control. Each topic focuses on a different part of the same challenge: how to manage heat, humidity, and air movement in a way that supports both people and production. In the first section, we look at
