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Top-Rated Bathroom fan installation pros in O Fallon - Updated Nov 2026

Down to the Wire, LLC
5.0(
6
)
Bath Exhaust Fan - Install

Serving O Fallon, MO and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality and customer service, that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship, and complete customer satisfaction, from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate, with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large, or small the job. Call us today!

Response time1 day
Response rate100%
18 neighbors recently requested a quote
Spartan Electric
4.3(
36
)
Bath Exhaust Fan - InstallBath Exhaust Fan - Repair

Serving O Fallon, MO and surrounding areas

Approved

Customers say: Quick response

"Tom from Synergy did the bid for under cabinet lighting install, however sent someone else to do the job. Originally discussed with Tom that he would use a regular converter box inside the cabinet and place a dimmer switch on the wall, but the other guy he sent wasn't aware of this and placed the dimmer converter in the cabinet. This has resulted in us having to use the dimmer switch inside the cabinet instead of on a wall switch -- not what I requested. Also, I discussed with Tom installing an additional outlet in our kitchen during the bid process. After he left I noticed he did not include that on the written bid. The guy he sent didn't know about it either. The outlet was installed however. Overall, I was charged $95 additional over the bid and didn't get exactly what I wanted in regard to the dimmer switch for under cabinet lighting. Both electricians were very nice and professional, but there was definitely a communication problem in regard to the installation of the under cabinet lighting. Perhaps I should have clarified the issue more strongly, or perhaps I didn't understand. Either way, I'm happy with the lighting overall, but not 100%."
Recommended by91%of homeowners
Avatar for FixPro
FixPro
5.0(
5
)
Bath Exhaust Fan - InstallBath Exhaust Fan - Repair

Serving O Fallon, MO and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

FixPro is a locally owned and operated handyman service proudly serving St. Louis, St. Charles, Lincoln, Warren, Franklin, and Jefferson Counties. We specialize in high-quality home repairs, carpentry, drywall, painting, flooring, deck repair, and general maintenance—handling everything from small fixes to larger improvement projects with precision and professionalism.\n\nWith years of hands-on experience across construction, maintenance, and service industries, I built FixPro to deliver what most contractors don’t: clear communication, reliable scheduling, and work done right the first time. We show up when we say we will, diagnose issues properly, and provide straightforward solutions without cutting corners.\n\nOur approach is simple—treat every home like it’s our own. We focus on clean workmanship, long-term durability, and customer satisfaction. If you want it done right the first time, FixPro is ready.\n\nNeed Something Fixed? Hire a Pro.

Cruse Construction, LLC
5.0(
5
)
Bath Exhaust Fan - Install

Serving O Fallon, MO and surrounding areas

Approved

In business since 2013

Free estimates

Small jobs welcome

"martin arrived on time checked the ceiling fan-the remote-and circuit breaker. gave a very reasonable estimate for install ceiling fan and attic exhaust fan. completed the work which did take more time but that was justified. did not charge more than the estimate. would absolutely hire again."
framing basement room
framing basement room
drywall installation basement room
drywall installation basement room
finished painted basement room

+33

Response time9 hrs
Recommended by100%of homeowners
Avatar for C3 Contracting LLC
C3 Contracting LLC
5.0(
4
)
Bath Exhaust Fan - Install

Serving O Fallon, MO and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Attention to detail was impressive. High quality work and very professional. Would absolutely recommend C3 Contracting to anyone and will be my only call from now on!"
Custom FarmHouse Closet
Custom FarmHouse Closet
Custom FarmHouse Closet
Custom FarmHouse Closet
Custom FarmHouse Closet

+9

Response time11 hrs
Response rate100%
3 neighbors recently requested a quote
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Bathroom Fan Installation FAQs, answered by experts

Ceiling fans are very often worth the investment because they improve comfort in your living space and help reduce utility bills. In the late spring and early fall—and even in the summer in some areas—homeowners with ceiling fans can often get away with open windows and fans, which can cut down on cooling bills and also reduce wear and tear on the HVAC system. Over time, ceiling fans can pay for themselves by saving you money on electric bills and air conditioner repair and maintenance.

Replacing an AC fan motor takes one to four hours for a pro to complete, depending on how easy or difficult it is to access the AC unit. A pro may also spend extra time inspecting the unit to make sure everything else is in good condition. It may take a few days or a week between the time a pro orders a new fan motor and when the replacement comes. 

Fan power is measured by CFM, or cubic feet per minute. For every 1,000 feet of square footage in your attic, you need a minimum of 700 CFM. Steeper roofs may need larger fans or about 840 CFM.  You can figure the size of attic fan you need by multiplying the square footage of your attic floor by 0.7. (multiply by 1.2 for a steep roof and 1.15 for a dark roof). That number is the CFM required for your fan to run efficiently.

Selection relies on matching fan size and power to attic volume and ensuring compatibility with home electrical systems and ventilation requirements.

Yes, you can lubricate a ceiling fan without taking it apart. Ensure the fan is off and clean any dust around the motor area before lubricating. Apply several drops of machine oil to the top of the motor housing where the shaft enters or via the oil ports if available. Regular lubrication helps maintain smooth operation and reduces noise. If your fan lacks an accessible oil port, it may require disassembly or professional maintenance.

The O Fallon, MO homeowners’ guide to bathroom fan installations

From average costs to expert advice, get all the answers you need to get your job done.