VEVOR 20 inch Shutter Exhaust Fan, Wall Mounted Attic Vent Fan with 3000 CFM Airflow, AC Motor, Heavy-duty Steel Construction, Low Noise for Shed, Garage, Greenhouse Ventilation Cooling, SilverElectrostatic powder coating technology ensures a durable and smooth finish, providing enhanced resistance to wear, corrosion, and environmental factors.Curved Fan BladesDurable and Weatherproof DesignDurable and Sturdy ConstructionVersatile InstallationWide Range of CompatibilityAirflow: 3000 CFM,Noise Level: ≤70 dB(A),Air Speed: 8.8 m/s,Temperature Rise: ≤70K,Item Model Number: AMX-FAG20,Item Dimensions: 23.03 x 23.03 x 8.54 in / 585 x 585 x 217 mm,Louver Opening Angle: ≥50-Degree,Net Weight: 14.33 lbs / 6.5 kg,Power: 157W,RPM: 1480 RPM,Main Material: Q235B Carbon Steel,Rated Voltage: AC 120V 60Hz