(Shown with Direct Drive Fan) Superior Design and Performance • The fans are constructed of heavy gage die formed galvanized steel • High efficiency, heavy duty totally enclosed motors, have a low operation cost • High efficiency blade produces more cfm/watt • All aluminum gravity operated shutters SQUARE WALL HOUSING (Shown with Belt Drive Fan) Additional Features-Belt Drive • Spring loaded automatic belt tightener • Quiet operation • 4 Wing High efficiency fan blade Additional Features-Direct Drive • No belts means more efficiency with less maintenance • 3 Wing High efficiency fan blade ANGLE WALL HOUSING DIMENSIONAL DATA Note: 1. Performance shown is for GDD series installation Type A free inlet free outlet 2. Performance rating does not include the effects of appurtenances in the air stream. GREENHOUSE ENVIRONMENTAL CONTROL SYSTEMS 'Designed lor the Professional" Page 4 SQUARE WALL HOUSING DIMENSIONAL DATA