Cast aluminum blades.

Direct drive heavy-duty industrial construction.

Totally enclosed motor standard, open drip proof and explosion proof optional.

Rolled inlet venturi for efficient air flow.

Utilizes heavy-duty construction.

Butterfly damper axles pivot on self-lubricating nylon bearings. Damper edge tapered for weather seal.

Wind band is 18 gauge galvanized with 2" double rolled edge top and bottom for added strength.

Rubber shim under dampers for better seal.

Rubber damper stops for quiet operation.

Acid resistant coatings available - consult factory for pricing.

Back draft dampers can be provided in curb base only.

Size of roof opening to be 6" larger than fan size.

For explosion proof or open drip proof models, consult factory representative.