Stale air, heat, and lingering odors build up fast in an attic, shed, or workshop without a way to push them out, this 16-inch wall-mounted shutter exhaust fan handles that job with 2900 CFM of airflow. An EC motor spinning at 1400 RPM on just 98W delivers up to 9 m/s of air speed while keeping noise at 70 dB or below, so it can run for hours without becoming a nuisance. The smart controller reads temperature and humidity and automatically steps through up to 10 speed settings, with timer and alarm modes for hands-off operation. Q235B carbon steel construction stands up to daily use, and the louvered shutters open only while the fan runs, then close to block rain and debris when it's off. At 14.99 lbs and roughly 18.9 x 8.7 x 18.9 inches, it mounts into a wall opening to keep garages, barns, and greenhouses ventilated year-round.