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90° Fully Open Fan Louver
The fan louvers can be fully opened to intake the largest amount of fresh air.
Exhaust Fan Shutter
Fan shutters can be fully closed to keep out the rain, dust, pest and light.
Higher Blade Curved Braket, higher airflow volumn
Rugged aluminum alloy pulley system for higher durability
Ultra-thick galvanized steel or stainless steel fan blade
One Piece Durable Automotive Bearing
Durable and Heat-Resistant Motor
High Efficiency 100% Copper Motor