The Greenheck propeller sidewall fan has a total of 4 different sizes to choose from depending on how much speed you want. This fan is designed to produce more air which cost on your electric bill. The horsepower on this fan is extremely larger and up to 1 horsepower than normal fans of the exact same size. The AC motors have even a larger horsepower to produce more larger area in a big industrial sized building.
Read more: Greenheck Introduces Model AER Direct Drive Sidewall Propeller Fan