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Attic Fan Installation
Ventilation only works if the air actually leaves the building. Fan wobble is usually mounting, not balance.
Attic Fan Installation in O’Fallon and across St. Charles, St. Louis, Lincoln and Warren counties.
Owner-operated by Clint Ehman. Seventeen years in the trade, four of them running his own shop.
5.0 from 94 Google reviews · BBB A+ since 2022
What this work actually involves
A fan-rated box goes in, braced to structure, because a ceiling box for a light is not a ceiling box for a fan.
The order is always the same: reproduce it, measure it, say what the number means, fix the thing the number points at. Nothing gets bundled on the way past.
Permits and inspections happen where the municipality requires them, and the panel is left labeled. One person does all of it.
When people call about this
- A fan that hums on low
- No ventilation in a new bathroom
- A wobbling ceiling fan
- A bath fan that does not clear steam
Why people choose Clint for it
There is no dispatcher taking a description for someone else to act on, and no commission riding on what the visit totals. The person who measures it is the person who fixes it.
Seventeen years in the trade and four running Infinity Electric out of O’Fallon, with 5.0 from 94 Google reviews and BBB accreditation since 2022.
Where this is done
O’Fallon is home and the shortest drive. Beyond it, St. Charles County, St. Louis County, St. Louis City, Lincoln County and Warren County.
See the full service area, or the rest of our fans & ventilation work.
Ventilation only counts if the air leaves
A bath fan that discharges into the attic moves the moisture rather than removing it, and the mould shows up in the roof deck instead of the ceiling.
Sizing matters too: the fan is matched to the room volume, and duct length and bends cut real capacity. A short, straight, insulated run to a proper outside termination is most of the job.
A fan is a moving load
A ceiling box rated for a light fixture is not rated for a fan. Fans transmit vibration as well as weight, and a box that was fine for a 5 pound fixture will work itself loose under a fan.
A fan-rated box braced to structure solves it, and it is the difference between a fan that is quiet in five years and one that wobbles in five months.
What an attic fan is actually for
It pulls heat out of the attic in summer, which lowers the load on the ceiling below. It needs adequate intake at the soffits to work, and without that it pulls conditioned air out of the house instead.
So intake gets checked before the fan is specified, the thermostat and humidistat are set on site, and the wiring is run to a disconnect in the attic as the code expects.
What makes this harder in older housing stock
Across this metro the recurring complications are predictable: no equipment ground, aluminum branch wiring from the mid-seventies, knob-and-tube buried in blown-in insulation, panels that have been added to several times, and splices in places the code has not allowed for decades.
Those turn a simple job into a decision about scope. The decision gets put to you with the reading behind it rather than made quietly and billed.
What the price actually depends on
Three things move the number on almost every job: how far the run has to travel and what it passes through, whether the existing panel has space and the service has capacity, and whether the municipality wants a permit and an inspection. None of those is visible from the phone call, which is why the measurement comes before the quote.
What does not move it is urgency theatre. There is no inflated figure waiting to be discounted, and no bundle built so the thing you called about cannot be bought on its own.
“Clint came out installed me a large 200 amp panel put some new dedicated lines in my basement and garage he did great clean work all inspections passed he was thorough and knowledgeable. I will have him back out again.”
Jason Holtzman · Google review
How the visit goes
- The call
Which room and what the fan needs to do: move air, clear steam, or both.
- The measurement
What the existing box is rated for, the room volume, and where the duct can reach the outside.
- The finding
Whether a rated box and brace are needed, and what duct route will actually clear the air.
- The work
Fan-rated box braced to structure, duct run to an outside termination, controls separating light from speed, and a quiet run tested on every setting.
What the job includes
- A fan-rated box braced to structure
- Ducting to the outside, sized to the room
- Controls that separate light from speed
- Balancing and a quiet run tested on every speed
- Old fixture removed and the opening made good
What it does not
- Supplying decorative fans, unless you ask
- Roof or soffit repair beyond the vent termination
- Attic insulation work
If the fix belongs to another trade, you get the name of one rather than a price from this one. Recent jobs are worth a look before you call.
Related fans & ventilation work
Attic Fan Installation across the metro
Housing stock varies sharply across the counties here, and so does the work. Out of O’Fallon across thirty municipalities, where the permit process changes more than the work does.
Lincoln County
Outages last longer this far from town, which changes the backup conversation from comfort to the pump.
Warren County
Newer builds beside older farm properties, with outbuildings and well pumps that town panels never see.
St. Charles County
St. Charles County is mostly 1990s and 2000s subdivisions. The wiring is modern and the services were sized before anyone owned an electric car or finished a basement, so capacity is the usual constraint rather than condition.
See which towns fall inside the radius on the service areas page.
Questions worth asking first.
Where does a bath fan have to vent?
Outside the building. Venting into the attic just moves the moisture somewhere you cannot see it condensing on the sheathing.
Can a fan hang from my existing ceiling box?
Only if that box is fan-rated and braced to structure. A light box will hold a fixture, not a moving load, so a rated box goes in first.
Why does my bath fan not clear the steam?
Usually the duct, not the motor: too long, crushed, or venting into the attic instead of outside. The fan also has to be sized to the room.
Do you pull permits?
Where the municipality requires one, yes, and the work is left ready for inspection with the panel labeled and junctions accessible. Requirements genuinely differ across this metro, which is why it is established per address rather than assumed.
How long have you been doing this?
Clint has seventeen years in the trade and has been running his own shop out of O’Fallon since 2022.
Worth a call before it gets worse.
Heat, a smell or a repeated trip is the house reporting something real. Attic Fan Installation in O’Fallon and across the metro.
Mon-Thu 8-5 · Fri 8-4 · Sat 10-3. A written note works too.