KFFKFF 20-inch Wall-Mounted Shutter Exhaust Fan with Adjustable Speed Controller, 3000 CFM, Durable Steel Construction, Quiet Operation for Ventilation in Sheds, Garages, and Greenhouses, Black

Efficient Air Circulation: This louvered exhaust fan provides 3000 CFM, effectively removing stagnant air, dust particles, heat, and unpleasant odors to maintain a fresh indoor environment. It is also ideal for use as a high-capacity ventilation fan in sheds and workshops. Adjustable Airflow Control: Experience seamless airflow adjustment with the stepless variable-speed control. The provided controller allows you to fine-tune the fan's output, ranging from a light breeze to a strong airflow, catering to diverse ventilation requirements. High-Performance AC Motor: Operating at 1480 RPM with 157W power, this motor delivers airflow speeds of up to 8.8 m/s. It ensures smooth operation with minimal noise, offering an efficient and stable solution for a quiet and comfortable environment. Perfect for year-round attic ventilation. Durable Construction: Crafted entirely from steel, this structure ensures exceptional strength, resists deformation, and withstands exposure to moisture and rain. It offers greater durability compared to plastic alternatives and is designed to endure challenging weather conditions. Rain Protection: The shutters automatically open when the unit is powered for ventilation and odor removal, and close when turned off to shield against rain and debris, offering dependable coverage for an attic ventilation system.