Wind-Driven Turbine Exhaust Ventilator, Bracing Location External, Head Diameter 25 1/2 in, Throat Diameter 16 in, Airflow @ 4 mph 950 cfm, Metal Material Thickness 22 ga, 24 ga, Overall Height 21 3/4 in, Overall Width 25 1/2 in, Housing Material Steel, Bearing Type Lower Thrust Ball Bearing, Oilless Bronze Upper Bearing, Bracing Material Steel, Housing Finish Galvanized, Includes -, Installation Requirements Base for New Installations, Flashing
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