Factors such as fan type, ventilation capacity, quantity of air delivered, static pressure, and energy efficiency can be quantitatively measured and reported. All are important criteria for selecting a fan or group of fans. Fan Type Fans can be axial flow or centrifugal. Axial fans are most commonly used in livestock buildings. Centrifugal fans are often utilized where inflatable curtains or ridge-closing bladders are found.
Fans can be axial flow or centrifugal.
Axial flow fans pass air straight through the fan parallel to the fan blade drive shaft. They are commonly used for livestock building ventilation. The initial cost is less and performance is influenced less by dirt buildup on the fan blades. Propeller fans have propeller-shaped blades mounted in a circular ring or orifice plate and a drive motor. Propeller fans scoop air and move it away from the fan blade.