The 10 Best Window mounted box Fans (2023 reviews)

We consider a window mounted box fan to be a worthy investment in the long run. We are here to help you choose the right one for your needs from all the best available products in market today.

Our review process: Show/Hide

Our Top Picks:

Best Overall: Buy: Air king entire house READ REVIEW

Best For sliding Window: Buy: Air king Window mounted box Fan READ REVIEW

Best With timer: Buy: Lasko Window mounted box Fan READ REVIEW

Best With Air filter: Buy: Genesis Window mounted box Fan READ REVIEW

Best For vertical slider: Buy: Holmes Window mounted box Fan READ REVIEW

Best With HEATER: Buy: comfort Zone Window mounted box Fan READ REVIEW

Best For bringing Air: Buy: Holmes extender panel READ REVIEW

Best For small room: Buy: Vornado Window mounted box Fan READ REVIEW

Best With bug screen: Buy: sharper Image Window mounted box Fan READ REVIEW

Best With Twin: Buy: Amazon Basics Window mounted box Fan READ REVIEW

Best Overall: Air king entire house

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Air King line of fan come in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. This fan is a cost effective way to cool the house without using the ac. It does an excellent job of bringing cooler air into a hot space. It is covered in shellac-bonded wood dust. It's quiet, has three speeds forward and reverse, and is easy to install. It also makes going outside more enjoyable all summer as the temperature swing is low from inside to outside.

This fan is incredibly heavy meaning there is no way to install it without first putting screws in your wall. It is made with good materials. The unit performs as expected and is fairly quiet, considering the volume of air it is moving.

• Very powerful fan it really cool down the whole apartment
• Vibrates and could be sturdier but not bad
• Works great, easy to install, cools attic fast
• Nice fan works for large house, well made

Best For sliding Window: Air king Window mounted box Fan

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Air King’s industrial fans feature durable, powerful motors and grounded plugs. This powerful window fan requires a window that is a minimum of 22 inches high and 26.5 inches to 34.5 inches wide. It fits most windows and creates a great draw of fresh air.

This fan is designed to attach to the window moulding with four small wood screws, either outside edge of moulding or the inside edge. It's an ok fan, with controls on the front. It offers a full line of industrial grade air circulating fans for industrial and commercial settings. This fan is sturdy, well made and no clicking/clanging. This fan is very quiet and is easy to install. The fan comes fully assembled with all the hardware you need for installation.

• Keeps air flowing in the garage
• Cheaply made, very flimsy, and cumbersome to use and install
• Lot of satisfied buyers

Best With timer: Lasko Window mounted box Fan

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If you are looking for a suitable fan for your regular usage, you cannot go wrong with the lasko window mounted box fan. This fan is handy to remove hot air and draw in cool air. It's powerful and quiet enough that you don't have to raise the volume of the tv to screaming levels. It's able to pull out the warm air, quickly, efficiently. It has expandable gap fillers and perforated holes for screws to mount on the window frame.

The ability to change between exhaust and intake is handy. It definitely pulls the cool air from the basement up through the house. The airflow this fan produces is more than adequate and with the in/out selections is extremely convenient for providing a nice air flow in the entire house easily when in exhaust mode.

• Works great as exhaust and intake
• One of the new comers and featured product

Best With Air filter: Genesis Window mounted box Fan

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This fan is very helpful when it comes to getting fresh air from outside into your home. It's a soft, relaxing "white noise" sound which blocks obnoxious sounds outside of your home. It is built to endure through all weather and situations. There are 2 removable stand legs to allow you to use this fan as a freestanding fan on a counter, ledge, or floor. The fans have 2 independent copper motors allowing you to choose to use one of the fan heads for intake while the other is used for exhaust simultaneously.

It can be installed into the window or used freestanding with its 2 removable legs. The fan fins rotate within the body of the tower which makes for very quiet operation.

• Very simple window unit with rudimentary temperature controls
• Nice and quiet with a very comfortable stream of air
• Very powerful but quiet enough even on the highest setting

Best For vertical slider: Holmes Window mounted box Fan

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Next on the list, we've got yet another fan that manages to win our hearts. It's the holmes window mounted box fan and it's widely considered as fan that has the most suitable features. It is great for bathrooms with a window and no exhaust fan. It fits into the window perfectly, and does a fantastic job of cooling the bedroom. It also looks neater if the cord can be tucked in to be shorter. It is not real strong but brings outside air in and cools the room.

The thermostat keeps the room at a great temperature. It has dual controls, each fan can be independently controlled for exhaust or intake.

• Love the fresh air while sleeping, and it works great
• Moves a lot of air and is very quiet
• Love the reversible option and variable speeds
• Works great without a lot of noise

Best With HEATER: comfort Zone Window mounted box Fan

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This window fan is versatile, as it can reverse and exhaust. The controls let you switch fan directions without turning fan around. It offers both intake and outtake options, which can be used simultaneously for air circulation. The cooling setting for this fan brings in fresh air, while the exhaust setting removes stale air.

This fan has dual, intake and exhaust at a click of a button. Each heater is designed to bring you performance in a wide variety of styles and features. It is perfect for litter box odder exhaust.

• Lightweight fan with 3 speed settings and also reverse
• Easy to use and very quiet
• Good brand reputation

Best For bringing Air: Holmes extender panel

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This fan can be used to supplement your air conditioner and help circulate cool air within your home. It provides products to transform the home environment for enhancement and ultimate comfort in everyday living. The double fan can run simultaneously as intake or exhaust or you can set one fan to intake & the other to exhaust. The automatic thermostat turns the fan off and on depending on the room temperature. The motors of this fan are water-resistant and the fan is safe to use during rainy weather but must never be fully immersed in water. You can use it with the screen in your window still in place, so it's very easy to mount.

These little switches allow you to either blow cool air into your home, OR suck the hot air out. There is also an additional plastic piece to really cover the entire length of the window.

• Good air control, quiet, and easy to install
• Easy to clean and not noisy
• Excellent fan with a temperature control
• Reversible and you can choose both direction of motors

Best For small room: Vornado Window mounted box Fan

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The vornado window mounted box fan's material feels more premium than its price would suggest. This fan has many good features, like the long cord with a regular plug, it’s easy to install, closes the fan blades when its off, and it’s cool to see them opening when it’s turn on, and it’s cool to see them opening when it’s turn on, and it’s cool to see them opening when it’s turn on, and it’s cool to see them opening when it’s turn on. It measures the inside air temperature, so it can be set to run until a temperature is met. It provides side foam to keep the hot hair on the outside from coming in.

The built-in Alexa feature is incredibly convenient. It smells, and keeps the air moving smoothly. It’s also fairly quiet and provides a nice continuous fan. It helps to keep fresh air into the room.

• Controls undesirable noxious exhaust, cooking, smoke etc from your home or your neighbor
• Attractive and quiet with handy remote
• Very attractive design and easy to use controls
• There’s no issues, no weird noise, no nothing

Best With bug screen: sharper Image Window mounted box Fan

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Sharper Image line of fan come in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. It's designed to be put in the window horizontally. It comes with a remote and is a little louder than the vornado. It makes a rotating sound when the fan is set to blow air into the room. The foam fillers work so-so but cutting them with a very sharp carpet knife and some white caulk works pretty well. It will sit up against the screen.

The fan lets in a decent amount of air even when it is off depending on how windy it is outside. It is built to meet U.S. voltage requirements. This should not be placed over any hot surfaces such as an oven.

• Works great blowing in and out
• Less than 1/4 inch to large for new standard window opening
• Doesn't block air when turned off
• Does not fit all windows without removing screen

Best With Twin: Amazon Basics Window mounted box Fan

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It can operate independently of one another. It has three settings for the fan blades with three levels of power and a temp gauge to turn the fan automatically once reaching the temperature you set. It's got a little notch to keep the cord from getting mashed against the window sill. The buttons make a loud beep, you have to cycle through the buttons to change the speed of the fan and the direction of the fans. It can barely feel any air, sitting right next to it.

The fan works perfect and fits nicely into a double hung window. It comes with two fan heads with 9 inch blades. It's light weight and runs quiet.

• Keeps your room nice and cool
• Powerful copper motor and adjustable thermostat
• Definitely cools down the room when in fan mode