Description
Features
CURB BASE – heavy gauge galvanized sheet steel base. All welded construction gives long maintenance-free service.
AIRFOIL ALUMINUM BLADES – cast aluminum airfoil blades mounted on heavy duty cast aluminum fixed pitch hub for quiet, efficient operation.
WIND BAND – galvanized sheet steel with two formed reinforcing ribs. It affords protection from weather and cross winds.
THROAT – galvanized steel inner throat is riveted to the deep venturi- type orifice for quieter, more efficient operation.
EXTERNAL BRACING – used on larger units to give extra rigidity and prevent sagging and vibration.
DAMPER LIDS – opens automatically when fan is turned on, closes automatically when fan stops.
POSITIVE BUMPER STOPS – adjustable neoprene tipped bumper stops assure closure of damper lids when fan is cut off, yet permit maximum airflow when open.
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