Home Appliances How to Install Exhaust Fan in Bathroom Window

How to Install Exhaust Fan in Bathroom Window

Have you been wondering about how to install exhaust fan in bathroom window?

For places that never seem to dry out, installing a bathroom fan is the answer. Windows, doors, window sills, bathroom paint, and fabrics such as towels and drapes are all vulnerable to moisture-laden air. Getting rid of bathroom odors and wetness provides for a far more enjoyable restroom experience for everyone.

While installing a bathroom exhaust fan isn’t the most straightforward home repair project, most of the work involves standing on a ladder and working above your head, as well as the more demanding task of squatting in your attic while wearing a dust mask or respirator.

Before you start, there are two difficulties that most homeowners with this project are concerned about: power and venting to the outside. The majority of home bathroom fans use AC120V electrical lines. These instructions will enlighten you on locating active electrical cables and route them to the proper spot.

After air from the bathroom is sucked into the exhaust fan, it is blown out of the home through a connected, flexible duct and out a hole in the house’s side or roof. Your bathroom will not have ducts because this is a new installation rather than a replacement. You will be able to route the flexible tubing outside as long as you can access the attic space above the bathroom ceiling.

Whether you have a luxurious bathroom or not, everyone desires to have a perfect temperature and environment in the bathroom. As having a floor cooling system just for your bathroom would wreck your budget to its core, we have found a well adopted, standard, and cost-effective method. How about installing an exhaust fan in the bathroom?

Exhaust fan ensures that the environment in your bathroom remains cool and comfortable.

How to do it

While we recommend that you leave all the electronic related adjustments of your home to an experienced electrician, you can still consider doing it yourself. Installation of an exhaust fan in your bathroom is not such a big task that you need an electrician for.

You can do it on your own easily. It will spare you a few bucks and leave you with a feeling of accomplishment. Ensure that you take all the measures that are critical to guard you during this task. Here we have composed the process about how to install exhaust fan in the bathroom window:

Expel Pane 

Before you begin to introduce the fan into the window, you have to expel the window sheet.

Supplant Glass 

Know that you can’t introduce your exhaust fan in the glass window as you could be breaking it. Consequently, you have to supplant the glass with Lexan as that is a considerably more substantial material for the reason.

Draw Outlines 

To be exact, with the exhaust fan position, you have to draw the diagram of its outline on the Lexan by utilizing the casing of the fan. This should be possible by utilizing a marker.

Make Space

To make space for the exhaust fan, it is important to cut out a hole for it. Although there are several different methods to do, we recommend that you use a glass cutter because that is the best way to get a clean cut out.

Reassemble Window

Now it’s time to reassemble the window with Lexan that has an appropriate hole to fit the exhaust fan into it. Now your window is ready for the installation of the exhaust fan.


As your window is back to its appropriate position now, you are ready to start the installation of the fan. All you have to do is remove the cover of the fan to make it easy for you to slide the motor into it.


To fix the fan, you need to make some holes for screws to fit in. You need them drilled into the Lexan. It would help if you put the fan on the Lexan for the holes to be in precise positioning after that carefully drill in a straight angle.

Set The Mount Case

Now you have to set the mount case with the goal that you can set the fan into it. For this reason,  you have to put the case on Lexan and screw fasteners. After you have screwed them, you can utilize locking nuts to ensure that they stay precisely in the correct position.

Set Exhaust Fan

Once you have mounted the case on the window, you can easily set the fan inside of it and then secure its position with a screw after that just put a cover and plug the fan in an electric outlet.

Your exhaust fan has installed successfully. If you do not feel confident about fixing it, leave it to an electrician. However, by following the steps mentioned above, you will be able to do the task efficiently.


1. Determine the source of electricity for the bathroom vent fan that will be installed in the ceiling. Power may be already turned on at the location where the bathroom vent fan will be installed. You may be able to share your bathroom lighting circuit with the fan, depending on your local electrical regulations.

2. Find the vent spot where the fan’s exhaust air must exit to the outside. As a result, a duct from the fan to the roof or a side wall will be required. Run the flexible ducting to a wall if possible, as this will assist you in avoiding shingle work and the risk of roof leaks.

3. Depending on where you want to vent to the outside, cut the exterior vent site into the wall or roof of the house. Bring around a vent (for walls) or a vent cap with you (for roofs). Bring a reciprocating saw, a cordless drill, a pencil, and silicone caulk, if you have them. Across the locating hole, place the spherical vent or vent cap. Make a circle with the pencil where the vent or cap will go.

4. Cut the bathroom fan’s inside the opening

5. Screw the bathroom fan into the joist.

6. Connect the bathroom exhaust fan to the outside

7. Attach the bathroom fan to the housing

Equipment, tools, and materials you’ll need are;

  • Safety glasses
  • Reciprocating saw
  • 6-foot ladder
  • Dust mask or respirator
  • Cordless drill
  • Half inch drill bit
  • Stud finder
  • Drywall jab saw
  • Pencil
  • One bathroom exhaust fan
  • 1 round wall vent or roof vent cap
  • 6 foot flexible ducting
  • Screws
  • Exterior grade silicone caulk.

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