Top 5 Best Bathroom Window Exhaust Fans (2021 Review)

Do you want to find the best bathroom window exhaust fan?

Window exhaust fans have extendable side panels so they can fit in almost any bathroom window to remove moisture and smells.

In this product review, I will go over...

  • My #1 top pick for the best bathroom window exhaust fan
  • An important safety hazard with window exhaust fans located above bathtubs
  • The 'reversible airflow' feature of window exhaust fans

Let's get started with this guide!

top best rated bathroom window exhaust fan reviews

My Overall #1 Rated Pick

top best rated bathroom window exhaust fan reviews bionaire
  • Window exhaust fan for small to mid-sized bathrooms
  • 3 fan speeds
  • Fits windows up to 37-inches wide with extender
  • Includes remote control
  • Motor is water resistant

My overall top pick for the best bathroom window exhaust fan goes to Bionaire. This window exhaust fan is great to remove moisture in a bathroom, and you can even have it turn on/off automatically to maintain a temperature. It has three fan speeds and it includes a remote control. The Bionaire fan can fit almost any window and can be extended to fit up to 37-inch wide windows. The motor is also water resistant which is great for bathrooms.

ImageProduct
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Bionaire
  • Up to 32" Windows
  • Remote Control
  • Water-resistant
  • Up to 32" Windows
  • Remote Control
  • Water-resistant
View on Amazon
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Amazon Basics
  • Up to 37" Windows
  • 9" Blades
  • Remote Control
  • Up to 37" Windows
  • 9" Blades
  • Remote Control
View on Amazon
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Holmes
  • Water-Resistant
  • 8" Blades
  • Manual Thermostat
  • Water-Resistant
  • 8" Blades
  • Manual Thermostat
View on Amazon
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Lasko
  • Bluetooth
  • 3 Speeds
  • 8-hour Timer
  • Bluetooth
  • 3 Speeds
  • 8-hour Timer
View on Amazon
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Genesis
  • Copper Motors3 Speeds
  • 9" Blades
  • Copper Motors3 Speeds
  • 9" Blades
View on Amazon

Top 5 Best Bathroom Window Exhaust Fans

My top picks for the best bathroom window exhaust fans all feature reversible fan blades. This means that each fan (two fans in one unit) can be set to either exhaust mode or to blow as a regular fan. These window exhaust fans can fit almost any sized bathroom window, and they come with accordion extenders to fit the size of your window. Check them out below...

  1. Bionaire (Top Pick)
  2. Amazon Basics
  3. Holmes
  4. Lasko
  5. Genesis

Are Window Exhaust Fans A Good Choice For My Bathroom?

Window exhaust fans are convenient ways to use in a bathroom if you don't have a 'normal' exhaust fan in the ceiling but have a window. Of course, just having a window cracked open can help with bathroom ventilation, but sometimes you just need something faster and more powerful.

These exhaust fans can fit standard window sizes, starting at 24-inches width, and can usually extend up to around 37-inches.

Almost all bathroom window exhaust fans have adjustable panels on each side of the fan. These 'accordion' side panels can be pulled out so it will perfectly fit your window.

Read Also: How To Fix A Noisy Bathroom Fan?

How Do Bathroom Window Exhaust Fans Work?

Bathroom window exhausts all typically have reversible airflow fan heads.

These products have dual fans, each side-by-side, and they can reverse air flow either forward or backwards to either exhaust air to the outside, or to pull in fresh air to the inside.

Also, one fan head can be in exhaust mode, while the other is in fan mode (both moving air in opposite directions) to increase the air circulation. In a bathroom, you obviously would want at least one side of the window exhaust fan to be blowing the air to the outside.

Read Also: What Are The Best Ventless Bathroom Fans?

Are Window Exhaust Fans Safe To Use Above A Bathtub?

There is an important safety hazard to mention with window exhaust fans if it is located directly above a bathtub.

If the window exhaust fan isn't secure to the window, and if it falls into a bathtub while full of water, it can electrocute anyone bathing. Most people don't realize that even charging a cell phone while taking a bath is dangerous if the phone falls into the bathtub.

And a window exhaust fan poses the same danger if you aren't careful.

GFCI outlets are required in all outlets in newly constructed bathrooms (older houses may be grandfathered in). These outlets have internal switches that can cut off electricity to the outlet if it detects a ground fault. However, it is a good idea to avoid plugging anything into an outlet that is located directly above a bathtub — whether it is an exhaust fan or a cell phone.

Read Also: How Much Electricity Does A Bathroom Fan Use?

top best rated bathroom window exhaust fan reviews (2)

How Do Window Exhaust Fans Control Temperature In A Bathroom?

Many window exhaust fans are also designed with temperature controls or thermostats.

This means that you can have the window fan turn on and off automatically to maintain a temperature in the bathroom.

What Are The Control Options Of Bathroom Window Fans?

Pretty much all window exhaust fans can be controlled manually by pressing buttons on the unit, but some come with remote controls.

And there are also some bathroom window exhaust fans that can be connected to your phone and it can be controlled using bluetooth. With any internet connected device, I recommend that you make sure the manufacturer takes your cybersecurity seriously.

Some window exhaust fans also have timers which will automatically shutoff the exhaust fan after a certain period such as 3-hours.

Read Also: What Are The Best Round Bathroom Exhaust Fans?

What Is The Best Bathroom Window Exhaust Fan?

Here are my full reviews of the best bathroom window exhaust fans with their pros and cons. Check it out below...

My #1 top pick is the Bionaire which is a highly rated window exhaust fan that can be used for small to medium bathrooms. It features reversible airflow blades so you can set both fans to exhaust, fan mode, or both.

The Bionaire also comes with a remote control so that you can control the mode, temperature, and other features. It comes with an adjustable extender so you can fit it in windows up to 37-inches wide.

The motors are also water resistant which is great for a bathroom window with high moisture (or if its raining outside). The Bionaire has three fan speeds.

Pros

  • Fit windows up to 37-inches wide
  • Includes remote control
  • Motor is water resistant

Cons

  • Fan has tiny fuse that can be problematic

This window exhaust fan by Amazon Basics is a premium unit that can be used for any small to medium bathroom. If you have a standard sized window between 25 and 32 inches, this dual fan blade window exhaust fan should fit.

The Amazon Basics window fan can be used either as a regular fan, an exhaust fan, or dual fan/exhaust.

It comes with a remote control, an adjustable thermostat, digital controls, and three fan speed settings. The copper motor will help this window fan last a long time even in the moisture rich environment of a bathroom.

Pros

  • Fits standard sized windows 25" to 32" wide
  • 9" inch dual fan blades
  • Use as regular fan, exhaust fan, or both at same time
  • Comes with remote control

Cons

  • Low exhaust output
  • Side shutters difficult to use

This twin window exhaust fan by Holmes is a high quality fan to remove moisture from your bathroom. It features two fans that are electronically reversible, so you can bring in fresh outdoor air, exhaust moist air, or do both at the same time.

It comes with an accordion extender as well as one 5" removable panel so you can fit this fan with almost any window size. The manual thermostat allows you to set your ideal temperature and let the fan maintain it automatically.

The Holmes window fan also has three fan settings. This window fan has water-resistant motors which is great for use in moist bathrooms.

Pros

  • 8" blades for twin fans
  • Will fit most windows with removable panel
  • Manual thermostat
  • Water-resistant motors

Cons

  • Loud
  • Doesn't move a lot of air

The Lasko window exhaust fan is a nice fan unit that you can install in a bathroom window to remove moisture. It is bluetooth connected which means you can control it with your phone using the free Lasko app.

Similar to other window exhaust fans, this Lasko fan can make both fans either exhaust, use as a regular fan, or make one exhaust and the other a fan. It comes with three fan settings and with a digital thermostat that will automatically control the fan to maintain a temperature if you wish.

The Lasko fan also comes with an 8-hour timer so you can make sure it is off or on when you want it. It will fit pretty much any double hung, casement, or sliding window up to 24" to 32" wide. It must be at least 12" high or up.

Pros

  • Bluetooth connected
  • Adjustable brightness of display
  • 3 fan speeds
  • 8-hour timer

Cons

  • Complaints of premature failure
  • Doesn't come with remote

The Genesis window exhaust fan is a great fan for any small to medium sized bathroom that has a window. This window exhaust fan has three fan speed settings and it has LED lights so you can easily see the current temperature.

For a bathroom, you will probably want to put both fans into the exhaust mode, but you can also set it to fan mode, or dual (one fan and one exhaust). This Genesis exhaust fan has two 9" fan heads and two motors made out of copper.

The copper motors will help resist the moisture inside your bathroom as well as any exterior raining. The expandable panels on each side of the window exhaust fan can move 6.5" on either side to fit almost any window.

Pros

  • Copper motors for durability
  • 3 fan speeds
  • Two 9" fan heads

Cons

  • Sound of electrical 'hum'

My #1 Top Pick: Bionaire

My overall #1 top pick for the best bathroom window exhaust fan goes to Bionaire. Here's why...

#1. Fits Most Windows

The Bionaire has an adjustable extender on both sides of the fan which allows it to be installed in windows up to 37-inches wide.

#2. Water Resistant Motors

The motors are water resistant which is great for bathrooms with a lot of moisture.

#3. Remote

The Bionaire fan unit comes with a remote control (3 fan speeds) so you can have full functionality of your exhaust fan from a distance.

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Arie Van Tuijl

Arie Van Tuijl

I am a licensed home inspector in two U.S. states and the founder of Home Inspector Secrets. After performing hundreds of inspections, and seeing thousands of house defects, I realized people would love to have an online resource dedicated to home maintenance. I write detailed home guides and product reviews sprinkled with inspection tips. You can read my bio here.

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