Best Small Square Window Fan

Hon&Guan 4 Inch Inline Booster Duct Fan with Speed Controller - 130 CFM Airflow with 6W Ultra-Low Power and Low Noise

Upgraded 10 Inch Shutter Exhaust Fan, 647CFM Low Noise Shed Exhaust Fan for Ventilation Use, 10" Silent Wall Mounted Extractor Fan with Mesh Screen for Basement, Gable, Chicken Coop, Black

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

AMACOOL Table Fan, 12 inch Box Fan with 3 Adjustable Speeds & 8HRS Timer, 60° Pivoting Quiet Air Circulator, Desktop Fan for Bedroom Bathroom Kitchen Office, AC Adapter Included

GDSTIME Big Airflow 3 * 120mm Fans DC 12V Powered Fan with AC 100V - 240V Speed Control, Cabinet Chassis Electric Cooling Fan, Server Workstation Cooling Fan

Bionaire BW2300-N Twin Reversible Airflow Window Fan with Remote Control, 2 Blades, White

SAILFLO Shutter Exhaust Fan, 6 Inch 176 CFM Reversible Airflow Double Direction Air Extractor for Bathroom Kitchen Attic Garage Basement Window Vent, 6" Propeller - 10"×10" Panel

HG Power 6 Inch Kitchen Exhaust Fan with Switch on the Cord, Powerful Bathroom Exhaust Fan with Damper, Potable Window Fan, Small Fume Extractor Ventilation Fan for Shop, Smoking Room, Garage, Silver

Wathai AC 12038 120mm x 38mm 110V 120V Dual Ball Metal Cooling Axial Fan High Airflow

LUCKTE Upgrade Axial Fan1 Big Airflow Computer Fan with AC Plug -120mm DC Fan ;12V Fan with Speed Control;110V - 240V AC ; for PC Cabinet Cooling Fan, Server Workstation and Router Cooling Fan