Dayton standard duty exhaust fans ensure proper ventilation in industrial and commercial facilities. These 6-blade, galvanised steel propellers move large air volumes at low static pressures (0.125 inches or less) to reduce sound levels and have sealed / regreasable pillow block bearings for smooth operation. They come with totally enclosed fan cooled (TEFC) enclosures that has an external fan mounted to the shaft to cool the motor frame. These units feature variable pitch, an adjustable motor pulley that allows fan speeds and CFM to optimise the fan's performance. The complete assembly includes the motor, belt, bushings and sheaves (packed separately) and can be easily mounted in either horizontal or vertical position. Choose from an extensive range of these exhaust fans, available in 3/4, 1 and 5/4 inch bearing sizes.