Bathroom Exhaust Fans

We install and replace bathroom exhaust fans

 Bathroom Exhaust Fan Installations Watertown, South Dakota.
We offer professional and installation of bathroom exhaust fans

We Install Or Replace Bathroom Exhaust Fans

The bathroom exhaust fan in your home plays an important role in keeping your home healthy by controlling the humidity and improving the air quality in your home. When your bathroom exhaust fan isn’t working, or is too small for the job it can lead to excess humidity, which leads to mold and moisture issues in your home. If your fan is running when you have a shower or a bath and the mirror still fogs up then your bathroom has an inadequate exhaust fan.

Cannon Electric is a full service electrical contractor serving the Watertown area. We specialize in the installation and replacement of bathroom exhaust fans in homes or commercial buildings. If your bathroom exhaust fan can’t keep up with the humidity in your bathroom we can upgrade it or we can also install bathroom fans where one hasn’t been installed before, properly venting to the outdoors instead of into your attic.

Bathroom Exhaust Fan Services We Offer

  • Bathroom exhaust fan replacement
  • Bathroom exhaust fan installations
  • Bathroom exhaust fan timer switches

How Do You Correctly Size Your Bathroom Fan For Proper Exhaust?

As already mentioned earlier on the page if you have a shower or bath in your bathroom with your fan on and the mirror still fogs up you have one of two problems. Your exhaust fan isn’t properly sized for your space or it could be worn out and in need of replacement.

Bathroom exhaust fans are rated by CFM (cubic feet per minute). This is the measurement of the air they can move. Your bathroom exhaust fan should be sized large enough so that it can replace replace the air in your bathroom at least eight times an hour.

Let’s say you have a bathroom with an 8 foot ceiling and it’s 8 feet wide by 12 feet long (8′ x 8′ x 12′). You would then multiply the width x length x height of the room. This gives us a total of 768 cubic feet. We then divide that number by 60 (which is how many minutes are in an hour) and we then multiply by 8 which is our target for total air exchange in an hour.

So that would look like this.

8′ x 8′ x 12′ = 768 Cubic Feet. Divided by 60 = 12.8. Then we multiply that by 8 which equals 102.4 CFM. The bare minimum CFM of your bathroom exhaust fan in this case would be 102.4 CFM. If you’re the type of person that likes to take long hot showers then it’s a good idea to size your bathroom exhaust fan a little bit larger than you actually need.

To save on your electrical bills we can even install a timer switch for your bathroom exhaust fan so it will run for a set period of time while you shower and a few minutes after to remove the excess humidity and then it shuts itself off so you don’t forget and leave it running all day.

Installing Your Bathroom Exhaust Fan Properly

It’s pretty common for bathroom exhaust fans to be installed incorrectly and sometimes even unsafely. One of the most common issues we run into is that the bathroom fan is usually undersized or under-performing, which leads to excess humidity, which can then lead to mold and mildew.

Another common issue we run into is usually due to shoddy installation practices with the actual venting of the fan. This needs to be sealed tightly so that humid air cannot be exhausted into your attic space or in between floor joists. This excess humidity can also lead to mold and mildew problems and even rotten roof decking and these are problems you just don’t want to have.

Why Choose Cannon Electric for Your Bathroom Exhaust Fan?

Cannon Electrical Truck with Owner Cody CannonWhen you choose to work with Cannon Electric to install or repair your bathroom exhaust fan you’re partnering with a small, local, company that has extensive experience in the electrical trades. We are licensed by the state of South Dakota and insured to work on the electrical systems inside of your home or building.

As an owner/operated company you can have the peace-of-mind knowing that any electrical work we complete will be safe and meet all local electrical safety codes. The work we do will be safe and reliable.

If you’d like an estimate to install or replace your bathroom exhaust fan give us a call at 605-520-0433.

Questions About Bathroom Exhaust Fans?


Bathroom exhaust fans are crucial for removing excess moisture and unpleasant odors, improving air quality, and preventing the growth of mold and mildew. They also help to clear mirror fogging and can prolong the lifespan of fixtures and paint by reducing humidity levels.

Yes, for safety and efficiency, bathroom exhaust fans should vent to the outdoors, not into an attic or crawlspace. Venting moisture-laden air into these spaces can lead to structural damage and mold growth.

Yes, many bathroom exhaust fans come with built-in lights or heaters, or both. A fan with a light can serve dual purposes, while a fan with a heater can provide additional warmth, making your bathroom more comfortable in colder weather.

It's generally acceptable for a bathroom fan and light to share a circuit in smaller bathrooms. However, if you have a larger bathroom or a fan with a heater, it may require its own dedicated circuit. Always consult with a professional electrician to ensure your setup complies with local codes.

If your bathroom fan stops working, it could be due to a number of issues such as a tripped circuit breaker, a faulty motor, or a problem with the wiring. It's important to have a professional electrician diagnose and fix the issue to ensure the fan operates safely and effectively.

On average, a bathroom exhaust fan should last about 10 years with proper maintenance. If it becomes noisy, less effective, or stops working, it may need to be repaired or replaced.

While it's common to use a dimmer switch with the light function on a bathroom fan, it's not recommended to use a dimmer for the fan motor itself as it can cause the motor to overheat and fail.  If you want to control the speed of your fan then a variable speed fan with a proper controller is a better option.


Was told that we may need an electrician during blizzard like conditions. Cody fit us into his schedule and able to fix what he could! Will definitely be keeping his number handy for future projects we have coming up.

Anita Sande January 15, 2022

Cody is great! He is professional, easy going and did a fantastic job on our hot tub installation 10/10 would recommend

Troy Warner October 19, 2021

I have had multiple opportunities to work with Cody and his team on joint projects. They have always been on site when they said they would. They are effective/efficient when on site. The workmanship looks great and they keep the workspace clean. They focus on customer satisfaction. They pay enough attention to what is going on around them and will help others when they see someone could use a little help.

Larry Jordan August 31, 2023

Cody is a great electrician - he is kind and courteous!! I would highly recommend Cannon Electric for all your electrical needs.

Stacy Hagen October 19, 2021

There is no finer Gentleman or Electrician than Chris Cannon. When you want on time and the best of the best you came to the right place.

Greg Leach September 16, 2022

Very friendly, didn't leave a mess, did a great job!

Michael McNamara October 6, 2020

Cody does an amazing job! I recommend him to anyone that needs an electrician.

Julia Kjenstad December 31, 2021

Very prompt an accommodation! Thank You!

connie schickedanz August 4, 2022

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