Window fans serve many functions, including cooling an entire room (and giving you some relief from the hot weather), providing whole room and/or house ventilation to get rid of hot, stale air or unpleasant odors, and significantly improving the air quality in your space.
These fans come in very easy, simple functioning options and include one or two fan blades that draw in cool air from the outdoors and exhaust indoor air when installed facing outward. More sophisticated window fans do all of the above and can include a remote control for convenient adjustment and an LCD screen that shows the selected indoor and current room temperature(s).
Designed to fit virtually all windows, these fans also come with extender panels that allow for a safe and customizable fit. In addition, quiet operation allows for ideal use in the bedroom, and water-resistant motors and features keep these fans safe to use during rainy weather.
1. Bionaire Reversible Airflow Window Fan
The Bionaire Window Fan comes with twin fan blades with independent settings that allow the fan to draw in fresh air from the outside, exhaust hot air from the inside or do both simultaneously. A programmable fan thermostat with LCD lets you select the desired room temperature and the fan automatically turns the blades on and off to maintain the selected comfort level. A built-in adjustable extender and three-speed settings allow for optimal cooling and comfort.
PROS: The Bionaire also comes with a remote control for convenient adjustment.
CONS: Some options may be more powerful.

2. Comfort Zone 3-Speed 3-Function Window Fan
This fan from Comfort Zone is aptly named — with three speeds, a reverse function and an included remote control, you’ll always be in your comfort zone. Plus, it has an expandable design, making it easy to ensure a proper fit in your window. The included remote control gives you full control over the speed and function settings.
Pros: Reversible to air out or cool a room. Expandable design to fit different windows. Includes a remote control.
Cons: Loud button beeping can be annoying.

3. Holmes Twin Window Fan
This unit from Holmes has dual fans, ensuring an efficient cool. It has a built-in thermostat function, so it’ll automatically adjust to keep you comfortable. Plus, you can reverse the fans, allowing you to air out or cool a room. The expandable design means it can fit different windows, and it can be situated vertically or horizontally.
Pros: Built-in thermostat. Energy-efficient design. Reversible blades.
Cons: No remote.
