Whole House Fan, Attic Fan & Gable Fan Installation in St. Louis
Three different fans, three different jobs all installed, replaced, and wired correctly. From whole-house fans that cool the living space to attic and gable fans that vent attic heat.
Whole House, Attic & Gable Fan Installation in St. Louis
FIX St. Louis installs and replaces three different ventilation fans for St. Louis homes. Whole-house fans (large fans installed in upper-level ceilings that pull cool outside air through open windows and exhaust hot interior air through the attic) cool the living space directly. Attic fans (mounted in the roof) vent attic heat to extend roof life and reduce upstairs heat load. Gable fans (mounted in the attic gable end) do the same job through a wall opening. We handle the cutout, the electrical, and the proper installation. Most jobs are completed in one to two visits. No minimum job size. Firm quote before any work begins. BBB A+ rated. Phones answered 24/7.
Three Different Fans – And Knowing Which One You Actually Need
Three fans share the words “attic” or “whole-house” in their names, and they do entirely different jobs. Mixing them up is one of the most common installation mistakes we see in St. Louis homes a homeowner installs an attic fan thinking it will cool the bedroom, or installs a whole-house fan and then can’t figure out why the attic is still 130 degrees in August.
A whole-house fan moves cool outside air through the living spaces and exhausts hot interior air up into the attic. It cools the actual rooms you’re in. An attic fan or gable fan moves hot air out of the attic only it doesn’t cool the living space at all. It does extend roof life, reduce summer heat soak from the attic into upstairs rooms, and lower attic temperatures from extreme highs.
Both have a real place in a St. Louis home. They just don’t do the same thing, and the right one for your house depends on what you’re trying to solve. FIX St. Louis installs all three correctly with the right cutout, the right bracing, the right electrical, and a wall switch (or thermostat for attic fans) that controls them properly. From the older bungalows of Webster Groves and Maplewood to newer construction across St. Charles County, we handle the install. See why St. Louis homeowners trust FIX before any work begins.
Dr. Steve’s Pro Tip:
If your upstairs bedrooms are 10–15 degrees hotter than the rest of the house in summer, your problem is most likely attic heat soaking down through the bedroom ceilings not insufficient AC. An attic fan or gable fan venting the attic is often the missing piece. The attic temperature can run 140°F+ on a sunny August afternoon in St. Louis; venting that heat keeps it from radiating into the rooms below all night.
What Each Fan Does – At a Glance
This page focuses on the fan equipment itself install, replacement, wiring. For deeper guidance on whole-house ventilation strategy, when a whole-house fan makes sense vs. AC, and how attic ventilation fits into your overall cooling plan, see our HVAC ventilation page.
| Fan Type | What It Does | When It Helps |
|---|---|---|
| Whole-House Fan | Cuts a hole in the ceiling of an upper hallway. Pulls cool outside air through open windows of the living spaces and exhausts hot interior air up into the attic. | Lets you cool the living space at night without running AC effective when outside temperatures drop into the 60s or low 70s overnight. Works in shoulder seasons and dry summer nights. Less effective in St. Louis’s peak humidity (when night temperatures stay high). |
| Attic Fan (Roof-Mounted) | Cuts a hole in the roof. Pulls hot air out of the attic and exhausts it through the roof vent. | Vents attic heat extends shingle life, reduces ceiling-radiant heat in upstairs rooms. Does NOT cool the living space. Runs on a thermostat that turns it on when the attic exceeds a set temperature. |
| Gable Fan | Mounts inside the attic, pulling air out through the existing gable-end wall vent. Same job as a roof-mounted attic fan, different mounting location. | Same as above vents attic heat, no living space cooling. Often easier to install than a roof-mounted attic fan because it doesn’t require cutting the roof. |
Whole House, Attic & Gable Fan Services FIX St. Louis Provides
Here’s the complete list of fan installation and replacement work we handle. For broader fan and ventilation context, visit our Fans hub page.
| Service | What We Do |
|---|---|
| Install a whole-house fan in upper hallway ceiling | Cut the ceiling opening, install the fan with proper joist support, run electrical, install wall switch — typically a 2-speed or timer switch. |
| Replace an existing whole-house fan | Remove the old unit, inspect the framing and wiring, install the new fan with updated specs. |
| Install an attic fan in the roof | Cut and frame the roof opening, install the fan with proper flashing to prevent leaks, run electrical to a thermostat that controls operation. |
| Install a gable fan in the attic | Mount the fan inside the attic at the gable wall, install over the existing gable vent (or modify the vent opening as needed), run electrical to a thermostat. |
| Replace a noisy or failing fan | Remove and replace any of the three fan types, including an upgrade to a quieter or more efficient model. |
| Install a wall switch or thermostat control | Add or replace controls — wall switches for whole-house fans, thermostats for attic and gable fans, timers for either. |
The Most Common Whole House & Attic Fan Calls
Dr. Steve’s Take:
Dr. Steve has covered attic ventilation in his eco-friendly home repair column because the energy math is genuinely strong. A vented attic runs 30–50°F cooler than an unvented one in St. Louis summer heat. That heat reduction translates directly to lower upstairs cooling load, lower AC runtime, and longer roof shingle life. The fan itself uses very little electricity less than a refrigerator and pays for itself in cooling savings within a few summers in most homes.
From Dr. Steve’s Tips: Eco-Friendly Repairs: Tiny Fixes to Reduce a Home’s Carbon Footprint
Dr. Steve’s Take:
When Dr. Steve writes about the home upgrades that quietly improve daily life, attic fans tend to come up because of one specific symptom the upstairs bedroom that’s 10 degrees hotter than the downstairs in August. Most homeowners assume that’s an HVAC sizing problem, then spend years irritated by it. In a meaningful percentage of cases, the actual issue is an unvented attic radiating heat downward through the night. A $400–800 fan installation often solves a problem that no amount of thermostat adjustment will.
From Dr. Steve’s Tips: Top 5 Most Overlooked Home Repairs (And Why You Shouldn’t Skip Them)
Dr. Steve’s Take:
Dr. Steve has also written about winter attic concerns ice dams, condensation, and roof failure caused by inadequate attic ventilation. While attic fans are mostly a summer-cooling story, proper attic ventilation matters year-round. In winter, warm moist air rising from the living space below condenses in a cold attic, soaking insulation and rotting roof sheathing. Some attic fans run year-round; others run only in summer. Knowing which makes sense for your roof and climate is part of the install conversation.
From Dr. Steve’s Tips: Cold Facts to Get You Through the Next Few Days (and Future Blasts)
Keeping Whole House, Attic & Gable Fans Running Right
These fans are largely “install and forget” but the small amount of attention they need extends their service life significantly. For more home maintenance guidance, visit Dr. Steve’s Tips.
| Frequency | What We Do |
|---|---|
| Annually (whole-house fan) | Test that the louvers open fully when the fan runs and close completely when it stops. Stuck-open louvers leak conditioned air all winter. |
| Annually (attic & gable fans) | Test that the thermostat triggers the fan at the set temperature. Use a heat gun on the thermostat sensor to confirm activation. |
| Every 2–3 years | Listen for new noise. A fan that’s developed a vibration or whine has bearing wear and is approaching motor replacement — cheaper to address proactively than after failure. |
| After major storms | Inspect the exterior roof attic fan flashing, gable fan vent louver, exterior screening. Storm debris can damage any of these. |
Dr. Steve’s Pro Tip:
If you have an attic fan and you’re wondering whether it’s actually working, go up the attic stairs (or open the access hatch) on the next 90°F+ afternoon. If the attic feels significantly cooler than the air outside, the fan is doing its job. If the attic is hotter than outside even with the fan running, something is wrong thermostat, motor, or insufficient intake ventilation (the fan needs soffit or eave vents to pull fresh air in).
FAQs
Attic & Whole House Fans in St. Louis
Right Fan, Right Job – Let’s Get the Air Moving.
Whole-house fans for cooling the living space. Attic and gable fans for venting attic heat. Replacement of an aging unit. The right fan for your situation, installed correctly, with a firm quote upfront and a wall switch or thermostat that actually controls it the way you want – FIX St. Louis handles all of it. No minimum job size. Phones answered around the clock.