How Much Does It Cost to Install a Bathroom Exhaust Fan?
Part of our Ventilation & Hot Water guides.
Total cost = the product + extra parts + labor. Product prices below are VEVOR list prices we checked in November 2026. Labor rates vary enormously by city, so instead of guessing a dollar figure we list which trades you need and how long the job typically takes: multiply by local hourly rates and get at least two quotes.
Cost breakdown
| Cost item | What to budget |
|---|---|
| Fan (VEVOR 80-110 CFM) | $48.90-$59.90 |
| Fan with heater | $97.90 |
| Duct + foil tape | small |
| Roof or wall cap (new installs) | small-moderate |
Labor: who and how long
| Trade | Typical time on the job |
|---|---|
| Replacement, same opening | 1-2 hours, often DIY |
| New install: electrician | 2-4 hours |
| New install: roofer/exterior cap | 1-2 hours |
Ways to save
- Pick a fan that fits the existing opening and duct size.
- From-below install fans avoid attic work.
Replacement vs new installation
Replacing a fan in the same opening, with existing duct and wiring, is a short job. A new installation where there was no fan means cutting the ceiling, running a duct to the outside through a roof or wall, adding a cap, and running a circuit or switch; that's several trades and more hours.
Heater fans
A 1500 W heater fan draws about 12.5 A at 120 V. Many codes require a dedicated circuit for it. If your existing fan shares a circuit with lights or outlets, budget for an electrician to run a new one.
Don't forget the duct
Replacing an old crushed flex duct with smooth rigid duct and a proper roof or wall cap improves airflow more than a bigger fan. It's inexpensive while the ceiling is open.
Frequently asked questions
Can I replace a fan myself?
Like-for-like swaps are a common DIY job with the power off; new circuits need an electrician.
How long does fan replacement take?
1-2 hours for a like-for-like swap.
Do I need to vent through the roof?
Through the roof or an exterior wall; never into the attic.
Can I add a light to my fan?
Many fan/light combos replace fan-only units; check wiring and switch needs.
Should I upgrade to a humidity fan?
If people forget to run the fan, a humidity-sensing fan pays off in mold prevention.