There are many facilities like hospitals, warehouses, kitchens, school, workshops, parking garages, storage facilities and many more commercial buildings use commercial fans. These fans are designed for general ventilation in the building and to remove smoke, heat, and gases to prevent any hazardous situation. The most extensively used commercial fans are exhaust fans which pull contaminated air out of the building and allows outside fresh air to enter the building. All the commercial building uses one or both of the following commercial exhaust fans:

• Wall mounted exhaust fan, which are mounted at a certain height opposite of doorways for appropriate ventilation.
•  Roof exhaust fan, which are mounted on the roof of the building on the exterior side.