Maximize air circulation and durability with this Silver 24" Wall Mounted Shutter Exhaust Fan-ideal for large spaces needing powerful ventilation! Boasting 4016 CFM airflow at 1400 RPM, it efficiently circulates indoor/outdoor air, freshening stagnant spaces and regulating temperature. Equipped with a 3-speed controller (50%-100% adjustment, 120V/3A/350W), it lets you customize airflow intensity. Crafted with corrosion-resistant aluminum louvers/blades and a sturdy steel frame, it resists rust for long-lasting use. Automatic gravity shutters open during operation and close tightly when off, blocking mosquitoes, dust, and debris. The fan arrives mostly assembled-simply mount the frame, connect the included power cord kit, and it's ready to use. Operating at 120V/60HZ with 150W power, it's perfect for attics, garages, greenhouses, warehouses, and barns, blending performance, safety, and ease of use for home and commercial ventilation needs.