Best Powerful Box Fan

Amazon Basics 20-Inch Box fan, 3 Speeds, 5 Blades, Lightweight Design, Black, 67 Watts, 6.8"D x 20.86"W x 21.33"H

Amazon Basics 20-Inch High-Velocity Industrial Floor Fan with 3 Speeds, Metal Construction and Aluminum Blades, Ideal for Industrial & Commercial Spaces, 125W, Black, 9.45"D x 23.43"W x 23.82"H

Comfort Zone Twin Window Fan with Quiet Setting, Reversible Airflow Control, 9 inch, 3-Speeds, Expandable, Exhaust, Dual Fan, Airflow 9.84 ft/sec, Ideal for Home, Kitchen, Bedroom & Office, CZ319WT2

Hurricane

Hurricane Classic 20" Floor Box Fan – Compact and Portable, Powerful and Quiet 3-Speed Cooling for Home, Greenhouse, Office, Gym, Garage, and Workshop

Lasko Wind Machine Air Circulator Floor Fan, 3 Speeds, Pivoting Head for Large Spaces, 20", 3300, White

Lasko 12” Utility Fan for Job Site or Home Use, 289 CFM, Pivoting High Velocity Blower Fans, 3 Speeds, 2 Accessory Outlets 120V, Black, U12104

Pelonis 42-Inch Tower Fan for Bedroom – Oscillating Tower Fan with Remote Control – Indoor Quiet Fan with 6 Speeds, 4 Modes and 24-Hour Timer – ETL Certified

HiCFM 8200 CFM 24 inch Portable High Velocity Drum Fan With Powerful 1/3 HP Motor, Turbo Blade, 3 Speed Low Noise Design and 9ft Power Cord for Air Circulation, Convenience - UL Listed

Lasko 20", High-Velocity Commercial Grade QuickMount, Converts from Floor Wall Mount Fan Ideal for Garages, Basements, Gyms, 2264QM, 7 x 22 x 22 inches, Black Silver

Simple Deluxe 20 Inch 3-Speed High Velocity Heavy Duty Metal Industrial Floor Fans Quiet for Home, Commercial, Residential, and Greenhouse Use, Outdoor/Indoor, Black, 1-Pack