[Compact Powerful & Low Noise]: 20 Inch shutter fan provides 3500 CFM strong airflow, 150W power and 1500 RPM high speed. Low noise design fits small to medium spaces perfectly with standard 20-inch mounting size.
[Automatic Self-Closing Shutter]: Built-in automatic louver opens and closes along with fan operation. Blocks cold wind, dust and rain effectively, protects the motor and extends service life greatly.
[Heavy Duty Aluminum Construction]: High-grade aluminum blades are rustproof, corrosion-resistant and heat-resistant. Sturdy structure withstands humidity and harsh environment for long-term reliable use.
[Fully Assembled Easy Installation]: Comes pre-assembled for hassle-free wall mounting. Simply fix the frame on the wall, connect power, and enjoy instant ventilation without complex assembly.
[Energy Efficient Multi-Purpose Use]: Energy-saving design optimizes air circulation, lowers indoor temperature and improves air quality. Ideal for attic, garage, workshop, welding room, factory, warehouse, barn and greenhouse.
