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

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

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

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

Genesis 20" Box Fan, 3 Settings, Max Cooling Technology, Carry Handle, White (G20BOX-WHT)

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

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

PELONIS 3-Speed Box Fan For Full-Force Circulation With Air Conditioner, Upgrade Floor Fan, Black, medium