VEVOR Wall Mount Fan, 20 in Wall Mounted Hanging Fan Oscillating, 3-Speed, Long Airflow Distance, Adjustable Rotation Angle, Mechanical Powerful for Industry, Commercial, Garage, Workshop, Gym, Black

The normal rating is over 3,000 CFM; the 4,650 figure is likely a mistake in the promotional materials—it must refer to a different model.

For mounting the 20-inch wall-mounted fan, we recommend using a 10mm (approximately 3/8 inch) masonry or concrete drill bit, depending on your wall material. Please ensure that the wall is sturdy enough to support the fan’s weight and vibration. We advise using appropriately sized expansion bolts (usually included in the hardware kit) for a secure installation.