Chris G.
Woodinville
Bathroom Exhaust Fan Installation in Seattle
Quiet fans sized to the room and vented outside, fan-light combos, humidity sensors, and timers. We replace fans that are loud or useless, and cut in new ones where a bathroom never had one.
WA Lic #CHARGCH761KL · Most jobs scheduled the same week
Sizing, Noise and Venting
Fan Installation & Replacement
A bathroom fan either clears the room or it does not. Three things decide which.
Sizing the Fan
One CFM per square foot covers most bathrooms up to 100 square feet. Bigger rooms, and anything with a separate toilet enclosure or a steam shower, get sized by fixture instead.
How Loud It Is
Measured in sones. Builder-grade fans run around 4, which is why nobody uses them. Under 1.0 is quiet enough that you have to look up to check it is on.
Vented Outside
Through the roof or out a soffit, never into the attic. Venting into the attic is a code violation and it puts every shower's worth of moisture into your insulation and sheathing.
Replacing an Existing Fan
Often done from below without opening the ceiling, if the new housing matches the old opening and the duct is sound. We check both before quoting it that way.
Why Moisture Matters Here
Seattle bathrooms spend half the year unable to dry out on their own. A fan that is undersized, too loud to use, or vented into the attic leaves that moisture in the house, and it shows up as peeling paint, black spotting on the ceiling, and eventually soft sheathing above the insulation.
Humidity, Timers and Combos
Fan Controls & Fan-Light Combos
A correctly sized fan still does nothing if it runs for the ninety seconds someone is in the room.
Humidity Sensors
The fan starts when the room gets damp and stops when it dries out, with nobody involved. The best option for a bathroom used by people who forget.
Timer Switches
Set it going for twenty or thirty minutes and leave. A fan switched off with the light has not run long enough to clear the room.
Fan-Light Combos
One unit in one opening for the fan, the light, and sometimes a night light or a heater. Fewer holes in the ceiling, one circuit to feed.
Continuous Low Speed
A trickle of ventilation all day with a boost when the room is in use. Suits tight, well-sealed homes where the air has nowhere else to go.
A humidity sensor or a timer costs very little next to the fan itself and is the difference between a bathroom that dries and one that does not. We fit either to a new fan or to one you already have.
What It Costs
What Determines Bathroom Fan Installation Cost?
Four things, in about this order of impact.
Replacing or Starting Fresh
Swapping a fan that already has a duct and a switch is the low end. A bathroom with no fan at all needs a circuit, a switch, a duct, and an exterior penetration.
Attic Access
A walkable attic above the bathroom keeps it short. A second-floor bath under a finished ceiling, or a flat roof, means working through the opening and takes longer.
The Duct Run
Short and straight beats long with bends. A run that has to cross the attic to reach a soffit needs insulated duct so it does not condense in winter.
Circuit and Switch
A fan-heater combo pulls enough to want its own circuit. If the panel has no room for one, we tell you during the estimate.
Every estimate is free and itemized, so you can see the fan and the labor as separate lines and choose the unit yourself if you would rather.
Customer Reviews
Real Reviews From Recent Fan Installs
Over 100 five-star reviews across Google, Yelp, and more. See all reviews
Common Questions
Frequently Asked Questions
Replacing a fan that already has a duct and a switch is the low end. Putting a fan into a bathroom that has never had one costs several times that, because it needs a circuit, a switch, a duct run, and a roof or soffit penetration. We price it on a free walkthrough.
Washington requires mechanical ventilation in a bathroom without an operable window, and in practice a window is not a substitute anyone uses in January. Without one, moisture ends up in the drywall, the paint, and eventually the framing.
No. It is a code violation everywhere in Washington, and it is how attics rot. The duct has to carry the moisture all the way outside, through the roof or out a soffit. If you have an existing fan venting into the attic, we can redirect it.
One CFM per square foot works for most bathrooms up to 100 square feet, so a 60 square foot bathroom wants at least a 60 CFM fan. Larger rooms, separate toilet compartments, and steam showers get sized by fixture instead, which usually lands higher.
Either it is a builder-grade unit running around 4 sones, or the duct is undersized or crushed and the fan is fighting it. Worth checking the duct before buying a quieter fan, since a good fan on a bad duct is still loud.
Most are a morning, if the new housing fits the existing opening and the duct is in good shape. Cutting in a fan where there has never been one is most of a day, and longer if there is no attic access above the room.
Free Estimate
Get Your Free Estimate
We respond to most requests within the hour, but will get back to you within a day at the latest.
What's Included in Every Fan Install
- Licensed, insured electricians
- Vented outside, never the attic
- Fan sized to the room
- Permits pulled where required
- Upfront pricing before we start
- Workmanship warranty
Prefer to talk it through?
How It Works
From Loud and Useless to Quiet
1
Tell Us the Bathroom
Call or send the form with the room size, whether there is a fan now, and whether anything above it is accessible. A photo of the ceiling and of the outside wall helps.
2
Free Estimate
A licensed electrician checks the existing duct, the attic access, and the circuit, then prices the fan and the work on one itemized sheet.
3
Installed and Tested
Most replacements are done in a morning. We confirm the fan is actually moving air to the outside before we leave, not just spinning.
Our Service Area
Bathroom Fan Installation Across Greater Seattle
We install and replace bathroom exhaust fans, fan-light combos, humidity sensors, and timer switches, and redirect fans that were vented into the attic, from Seattle to Mount Vernon. Free estimates, upfront pricing, and a full warranty are the In Charge Home Electric standard for all projects.
Our service area includes
SeattleBellevueRentonKirklandRedmondBothellShorelineBurienTukwilaEverettArlingtonMount VernonLynnwoodMarysvilleEdmondsKenmoreMercer IslandSnohomishSammamishMedina
and surrounding communities
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