Designed for industrial spark resistant applications requiring high volumes of air at high static pressures. Constructed out of heavy gauge steel with polyester gray coating. Scroll is clockwise rotation and can be rotated in 45º increments to 8 positions (shipped in upblast position). Includes weatherhood and a bolted access door located on the scroll. Features electronically commutated (EC) motor, providing up to 60% energy savings. Potentiometer dial on motor allows speed control down to 80%. Optional speed control kit No. 43Y140 allows the user to manually adjust a fan's speed from a remote location and mounts to a wall using a 2x4 junction box. For internal or external mounting.