Dayton supply fans are designed for circulating airflow along with controlling the temperature in warehouses, factories, plants and offices. These units feature 6-blade, galvanised steel propellers to move large air volumes at low static pressures (0.125 inches or less), thereby reducing sound levels. They also feature variable pitch, adjustable motor pulley that allows varied fan speeds to optimise fan performance. These fans come with totally enclosed non-ventilated motor enclosure (w/o openings or external fans) and depend on a simple convection method for heat dissipation from the motor frame. Choose from a wide range of these supply fans, available in speeds of 953, 1039 and 1221 rpm speeds.