Installing a bathroom exhaust fan where none existed costs $250 to $950, while replacing an existing fan runs $150 to $550, according to HomeGuide, whose replacement average of $360 is tied to 220 reported member projects.[2] Angi reports a $396 national average for fan installation – most homeowners pay $241 to $563 – based on 2,554 verified Angi Pros projects, and Fixr publishes a $400 average for new installs against $200 for replacements.[1][3] The fan itself runs $20 to $400 per unit, with installation labor a separate $200 to $800 per job; the work can involve wiring, ductwork and a hole through the building envelope.[2]
Safety first: this is electrical work, and the fan must vent outdoors. Broan-NuTone’s own installation guide for its bath fans requires that power be switched off at the service panel before any work, that installation and electrical wiring be done by a qualified person in accordance with all applicable codes, and that ducted fans always be vented to the outdoors. It also warns against cutting into walls or ceilings without checking for hidden wiring. A bathroom fan is not a casual DIY swap.[4]
Bathroom fan installation cost by source
| Source | Average (per job) | Typical range (per job) | Scope as published |
|---|---|---|---|
| HomeGuide | $360 | $150 – $550 | Replacement of an existing fan; tied to 220 project costs reported by HomeGuide members |
| HomeGuide | (not listed) | $250 – $950 | New installation vented through a wall or roof |
| Angi | $396 | $241 – $563 | Bathroom fan installation; tied to 2,554 verified Angi Pros projects |
| Fixr | $400 | $250 – $900 | New installation where no fan existed |
| Fixr | $200 | $150 – $500 | Replacement of an existing fan |
Angi, HomeGuide and Fixr are separately owned publishers, and their pages state no shared sourcing. Angi’s own page gives two different ranges – $120 to $900 in its summary box and $241 to $563 in its body – and Fixr’s summary says replacement “drops to $250” while its body says $200 on average; all versions are reported as published.
Fan prices by type
| Fan type | Unit price (HomeGuide, per unit) |
|---|---|
| Basic, fan only | $20 – $50 |
| Ceiling-mounted | $20 – $400 |
| Wall-mounted | $20 – $345 |
| Inline | $100 – $310 |
| Fan with light fixture | $40 – $330 |
| Fan with heater | $90 – $280 |
| Fan with humidity or motion sensing | $100 – $400 |
| Adjustable speed | $90 – $380 |
| Continuous run | $120 – $330 |
Bathroom exhaust fan prices by type, before installation labor. Source: HomeGuide. Angi publishes a nearly identical type table on its own page; the pages state no shared sourcing.
Fan cost by bathroom size (CFM)
| CFM rating | Bathroom size (sq ft) | Fan cost (Angi, per unit) |
|---|---|---|
| 80 or less | 40 – 80 | $20 – $250 |
| 80 to 99 | 80 – 100 | $50 – $325 |
| 100 to 150 | 100 – 150 | $55 – $400 |
| 150 or more | 150+ | $100 – $500+ |
Fan cost by CFM rating and bathroom size. Source: Angi. Both Angi and HomeGuide publish the same sizing rule of thumb – at least 1 CFM per square foot of bathroom floor, plus 50 CFM per tub, toilet or shower and 100 CFM for a jetted tub – attributed here as their published guidance, not a code citation.
Labor, venting and permits
| Cost item | Cost as published |
|---|---|
| Installation labor (HomeGuide and Angi) | $200 – $800 per job; both publishers give the identical range, and the pages state no shared sourcing |
| Hourly rates (HomeGuide) | Handyman $50 – $80, electrician $40 – $100, HVAC service $70 – $150 per hour |
| Time required (HomeGuide) | 4 to 8 hours per job |
| Ductwork for a new vent (HomeGuide) | $50 – $150 per job |
| Vent through the roof (HomeGuide) | $350 – $950 per job, plus permits |
| Vent through a sidewall (HomeGuide) | $250 – $800 per job |
| Permits (Angi) | HVAC permit $250 – $400, roofing permit $70 – $250, electrical permit $10 – $500 per permit |
Labor, venting and permit costs. Sources: HomeGuide and Angi. HomeGuide advises venting through a sidewall where possible because roof penetrations are more prone to leaks.
Venting: outdoors, and keep the duct run short
Broan-NuTone’s installation guide is direct: ducted fans must always be vented to the outdoors, and the duct run has a strong effect on airflow, noise and energy use, so the shortest, straightest routing performs best. It adds that insulating around ducts can reduce energy loss and inhibit mold growth, and that fans on existing ducts may not achieve their rated airflow.[4] HomeGuide’s guidance matches on the failure modes: fans must vent through a sidewall, roof, gable or soffit, and reusing an existing roof or wall vent can cause backdrafting and condensation problems inside the home.[2]
DIY or hire a pro?
The manufacturer’s own instructions settle this one: Broan-NuTone requires that installation work and electrical wiring be done by a qualified person in accordance with all applicable codes, with power off at the service panel before anything is touched.[4] Fixr draws the same line between the two jobs – a like-for-like replacement is the simple case, while a new installation means routing a duct through finished walls and ceilings, which is why it says new installs need an electrician’s help.[3] With the manufacturer requiring qualified installers, this guide carries no DIY procedure and no shopping link; the figures above are cost estimates for hiring the work out.
Related cost guides
See our guides to attic fan repair cost, ceiling fan installation cost, outlet repair cost, HVAC repair cost and roof repair cost.
Sources
- Angi – How Much Does It Cost to Install a Bathroom Fan? (updated Sep 10, 2026)
- HomeGuide – Cost to Install a Bathroom Exhaust Fan (September 14, 2023)
- Fixr – How Much Does It Cost to Install a Bathroom Exhaust Fan? (updated February 7, 2025)
- Broan-NuTone – Bath Fan Installation Guide (ZB80/ZB110 series) (manufacturer installation instructions)