Best Small Square Window 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 Reversible Airflow Control, 9 inch, Auto-Locking Expanders, 2 Speed Fan, Dual Fan, Exhaust, Airflow 9.84 ft/sec, Ideal for Home, Kitchen, Bedroom & Office, CZ319WT

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

Koonie USB Fan, Strong Wind Ultra Quiet Small Desk Fan 220° Tilt Folding 3 Speeds Adjustable USB-C Corded Powered Personal Fan for Home Office Desktop Black

shinic Twin Window Fan with Remote, 9-Inch Blades Reversible Airflow, Thermostat Control, 3 Speeds, 3 Functions, 23.8"-37" Expandable Width, Window Exchaust Fans for Home Bedroom, ETL Certified

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

BEYOND BREEZE 9" Twin Window Fan, 2-Speed Expandable Dual Window Fan with Reversible Airflow Blades, Manual Controls

HOLMES Dual Blade Digital Window Fan with Programmable Thermostat Control, Dual 3 Blade Fans, 2 Speeds, Expandable Side Panel with Additional Extender Panels, White

shinic 10" Tabletop Box Fan for Bedroom, 2 Speeds, Quiet Table Fan with Strong Airflow, Energy Efficient Small Box Fan, Portable Kitchen Exhaust Fan for Bedroom Bathroom Office Dorm Workshop, White

SAILFLO 8 Inch Window Shutter Exhaust Fan with Reversible Airflow, 176CFM 25W Wall-Mounted Quiet Ventilation Fan Air Intake Extractor for Bathroom Home Bedroom Attic, φ6 Inch Impeller