How Much Does It Cost to Install an Exhaust Fan in the Bathroom?

By Elizabeth Michael

December 03, 2025

Bathroom exhaust fans deserve a lot of credit, as these handy fixtures play an important role in keeping your bathroom free of moisture, mold and unsavory odors. Exhaust fans can cost up to $588 (CAD 813) or more to install, and they work by pulling moisture and odors into a ventilation system and venting it outside the home. You may be wondering who installs bathroom exhaust fans.

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The short answer? There are actually several different people behind the successful installation of a bathroom fan, including HVAC technicians, electricians and roofing specialists.

Who Installs Bathroom Exhaust Fans?

A common belief is that plumbers are the people who install bathroom exhaust fans. However, the opposite is actually true. To properly install a bathroom fan, you may need to hire both an HVAC technician and an electrician, and possibly a roofing contractor. This is because bathroom exhaust fans require ductwork, and it's always best to hire a professional HVAC technician to ensure proper duct installation.

The fans run on electricity, and you'll most likely need an electrician to assist with wiring work. If your exhaust bathroom fan requires ventilation through your home's roof, you may need to add a roofing contractor to the mix.

What Is the Installation Process Like?

The steps involved with installing a bathroom ventilation fan can vary. If you're replacing your bathroom fan, you may only need to remove the existing unit and install a new model. Installing a new fan from scratch typically includes creating an opening in the bathroom ceiling and installing ductwork and electrical wiring.

When replacing a bathroom exhaust fan or installing an entire fan system, it's a good idea to schedule service with a professional electrician. The replacement process involves locating and shutting off the circuit breaker attached to the unit, as well as removing the fan's housing and motor unit. If you're installing a new exhaust fan in a bathroom without previous ventilation, the process requires several steps that should be performed by licensed professionals.

How Are Bathroom Vent Fans Installed?

There are several steps involved with installing a bathroom vent fan. While exact procedures can vary depending on factors like fan size and location and the type of work required, here's a general rundown of the bathroom vent fan installation process:

Preparing the ceiling: When installing a ventilation fan in a previously unventilated bathroom, the first step is for the HVAC technician to find a mounting spot between ceiling joists to install the fan and housing. After locating the proper spot, they mark the area and saw out openings for the fan and ductwork.
Running the ductwork: Routing the ductwork is the next step in the installation process. This step should also be performed by a professional HVAC technician. It involves connecting the ductwork to the ventilation fan housing and routing the ductwork through an exterior vent. If this is a new installation and you need to install an exterior vent on your home's roof, you may have to contact a professional roofing company or general contractor to complete this step. It's also important to vent the ductwork through an outside vent rather than the attic. Venting into the attic or another enclosed space can increase the risk of mold and mildew growth.
Connecting the electrical wiring: After your HVAC technician runs the ductwork, the electrical components must be installed and connected. To ensure proper safety, it's best to schedule service with a professional electrician. Your electrician will run a new electrical cable from the switch in your bathroom or another power source to the fan's location, then connect the wiring from the fan to the ceiling.
Installing the fan housing: Once the wiring is safely in place, the next step is to secure the fan housing into the ceiling opening. Your HVAC technician can do this by screwing the housing to the ceiling joists.
Connecting the exterior vent: After the housing is properly installed, the HVAC technician can perform the final steps of attaching the routed ductwork to an exterior vent cap. Once attached, they seal off the cap to prevent moisture from entering your home.

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How Much Does It Cost to Install a Bathroom Exhaust Fan?

The average total cost to install a bathroom fan, including materials and labor, is approximately $588 (CAD 813). Here's a breakdown of each cost:

Bathroom exhaust fan kit: $100 (CAD 138)
Installation supplies: $30 (CAD 42)
Labor costs: $120 (CAD 166) per hour for 3 hours of labor = $360 (CAD 498) total
20% contractor markup: $98 (CAD 135)

It's important to note that these prices are averages, and many factors can contribute to higher or lower final costs. For example, an exhaust fan with smart features like voice controls and light settings may cost more than a standard bathroom exhaust fan without extra features. Exact labor costs can also vary depending on where you live and who installs your bathroom exhaust fan.

All CAD conversions are based on the exchange rate on the date of publication.

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