Shininglove 20" Industrial Shutter Exhaust Fan - 3500 CFM Aluminum Wall-Mounted Fan w/Auto Gravity Shutters | Low-Noise Attic/Warehouse Ventilation (120V)

INDUSTRIAL AIR MOVEMENT: 3,500 CFM airflow—clears 10x12 ft room in 90 secs (1,500 RPM). AUTO GRAVITY SHUTTERS: Open/close silently—blocks rain, pests, and drafts when off. MILITARY-GRADE DURABILITY: 0.8mm aircraft aluminum blades + shutters (no rust in humid/wet environments). WHISPER OPERATION: 56 dB noise level (library-quiet for 3,500 CFM). PRE-ASSEMBLED INSTALL: Mounts directly to walls/attics—no tools needed (fits 20" or 24" openings). ALL-ENVIRONMENT READY: → Attics (reduces AC load) → Workshops (vents fumes) → Barns (controls ammonia) SAFETY CERTIFIED: ETL-listed + thermal overload protection (safe for 24/7 operation). ENERGY-SAVING: 120V, 1.2A (costs $0.15/hr to run).