Dayton exhaust fans pull out odour, moisture and fumes from inside to outside of a vent in commercial and industrial applications. They have galvanised steel construction with 5 / 6 steel or aluminium bladed propellers for load support to the rotating shaft, corrosion resistance, durability and withstanding a maximum ambient temperature of 104 degrees F. These fans come without assembled belt drive packages that offer flexibility in terms of rpm speeds, as the motor is not directly in contact with the fan's moving parts. Choose from a wide range of these exhaust fans, available in maximum airflow speeds of 20998, 30825 and 33227 CFM.