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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.

Avatar for Local Handyman St. Louis
Local Handyman St. Louis
4.6(
9
)
Bath Exhaust Fan - Install

Serving O Fallon, MO and surrounding areas

Approved

In business since 2025

Warranties offered

Small jobs welcome

"Very friendly and knowledgeable crew that showed up on time and got the work done efficiently. Had outdoor handrail installed, bathroom cabinet over toilet, 2 story curtains & sheets hung, bidet installed, grab bars in shower."
Wood Chip
Repaired stair
Sunroom before
Sunroom before
Sunroom before

+11

1 neighbors recently requested a quote
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

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.

Whole-house fans cost significantly less to run than a window AC unit. You'll pay an average of $0.01 and $0.05 per hour to run a whole-house fan compared to $0.06 to $0.88 per hour for the cost to run a window AC, depending on its size and the size of your home. They also use far less electricity than traditional central AC units.

The direction you want your ceiling fan to move in depends on the season you’re in. During summer, you want it to move counterclockwise to produce a cooling downdraft. During winter, you want it to move clockwise to circulate warm air throughout the room.

Most ceiling fans have a lifespan of anywhere from five to 15 years or 10 years on average. Just how long your ceiling fan lasts depends on the quality of the parts, how much it’s used, and how well you maintain it. A fan with a weak motor that runs on the medium setting nonstop is likely to have a shorter lifespan compared to a fan with a powerful motor that runs on the slowest setting for air circulation.

Attic and whole-house fans improve a home's energy efficiency and comfort. They ventilate hot air from the attic, which reduces peak cooling loads, lowers reliance on air conditioning, and decreases indoor temperatures. This improved air circulation and expedited heat exit helps lower cooling costs, balance moisture levels, and enhance overall natural airflow, contributing to the efficient operation of other home equipment.

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.