Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
See the difference
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After
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AfterHow Much Does Air Quality & Sanitizing Cost in St. Louis?
Air quality and sanitizing work in St. Louis typically runs $350 to $1,400 for most homes, with duct cleaning plus a sanitizing treatment landing around $550 to $900 in the typical case. A standalone sanitizing fog with no cleaning usually costs $150 to $400. Larger homes, heavy buildup, or duct repair found during the visit push the number higher; the written estimate you get before any work starts sets the final price.
The rest of this guide breaks the St. Louis market down line by line so you can see what you’re actually paying for, why the range is as wide as it is, and where money can be saved without cutting corners. If you want a firm number for your house, call (877) 349-6189. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. Estimates are free.
Key Takeaways
- Duct cleaning plus sanitizing for a typical St. Louis home: $550 to $900.
- A standalone sanitizing treatment without cleaning: $150 to $400.
- Whole-home air quality work, including duct repair and filter upgrades: $350 to $1,400.
- St. Louis homes deal with humid summers and long heating seasons, both of which feed biological growth in ductwork and make containment during cleaning matter.
- Cleaning matters more than sanitizing. A sanitizer sprayed onto dirty ducts does little; it does its job after the ducts are actually clean.
Everything we do on this page sits inside the work of an indoor-air specialist. For the full picture of what we handle, see Bellmont Air Duct Cleaning.
Air Quality & Sanitizing Cost Breakdown (2026)
Here’s how the pieces break out for St. Louis homes. These are estimated ranges for professional work, not consumer blower units or a shop-vac on wheels. Prices are set per job by the written estimate, so treat these as planning numbers.
| Service | Typical range (St. Louis, 2026) | What’s included |
|---|---|---|
| Air duct cleaning (full system) | $300 – $700 | Source extraction of every run, supply and return, plus registers and boots |
| Duct cleaning + sanitizing treatment | $550 – $900 | Full cleaning followed by a fogged sanitizer through the duct system |
| Standalone sanitizing fog (no cleaning) | $150 – $400 | Sanitizer fogged through ducts; best used on already-clean systems |
| HEPA containment during cleaning | $80 – $250 | Abatement Technologies equipment to keep disturbed dust out of living space |
| Duct repair, per problem area | $250 – $900 | Sealing or reconnecting disconnects, patching crushed or torn flex runs |
| Whole-home duct sanitizing + filtration upgrade | $400 – $1,400 | Sanitizing plus a Honeywell or Aprilaire filter or humidifier upgrade |
| Dryer vent cleaning (bundled) | $100 – $250 | Lint and obstruction removal from the full dryer vent run |
What pushes these numbers up: the number of runs and registers, how accessible the ductwork is, how long since the last cleaning, and whether a repair turns up once the ducts are opened. A house with twelve runs and a clogged return costs more than a small single-story with six. A crumpled flex line behind a knee wall means the technician has to get in there. Tighter filters, an Aprilaire humidifier, or a Honeywell filtration upgrade add cost too, but they also change what’s actually moving through your air, which is the point of the whole exercise.
What pushes them down: fewer runs, easy attic or basement access, and a system that’s been kept reasonably clean. A sanitizing fog on its own is the cheapest entry point, but it’s honestly not where we’d advise starting if the ducts are dirty. Sanitizer sprayed into dirty ductwork mostly coats the dust. Clean first, then treat.
What Affects Air Quality & Sanitizing Pricing in St. Louis
Pricing isn’t a flat rate for a city. It’s driven by the specific house. Here’s what moves the needle most in St. Louis, and why.
- Home size and the number of duct runs. A typical South City single-story with six or seven supply runs is a different job from a four-bedroom in Chesterfield or a larger house out toward Ballwin. More runs means more extraction time, more registers, more boots, and a higher estimate. This is the single biggest cost driver on nearly every quote.
- How much has built up and how long it’s been there. A home cleaned within the last few years is quicker to work through than one where old construction dust, pet hair, and settled debris have been hashing out for a decade. Heavier accumulation takes longer and may need a second pass.
- St. Louis humidity and the length of the heating season. Summers here run hot and muggy, and the heating season runs long. That combination is the exact environment biological growth and dust mites like. Systems that have run hard through a humid summer are more likely to show growth in the ducts, which is where a sanitizing treatment earns its place after cleaning.
- Older housing stock and duct layout. A lot of St. Louis homes have ductwork that’s been modified over time, especially in older neighborhoods like Tower Grove and the near South Side. Retrofit runs, odd turns, and flex duct that’s sagged or crushed show up on the estimate and add to the work. We diagnose and repair that ductwork on the same visit rather than sending you to find a second contractor.
- Access to the ductwork. A system with a crawlspace, a basement, or an open attic is faster to work on than one where the runs disappear behind finished walls. Access dictates hours, and hours are a cost. It also determines whether HEPA containment with our Abatement Technologies equipment can be set up cleanly.
- Whether repair turns up on the visit. Duct disconnects, crushed runs, and leaky joints are common and often invisible until the system is opened. Fixing them changes the scope, and it’s also one of the best things that can happen for your air quality because leaks pull attic or crawlspace air straight into your home.
One more point: our technicians have up to 9 years of experience, and on a job of this kind, knowing where to look for a disconnect before it becomes a leak is most of the value. If you’re pricing this out for the first time, the St. Louis service overview is a good place to start.
Cleaning and Sanitizing Are Two Different Jobs
It’s worth understanding this before you compare quotes. Cleaning pulls the accumulated dust, debris, and lint out of the duct system using extraction with containment. Sanitizing is a treatment applied after cleaning to reduce what’s left on the inner surfaces. A quote that only includes a fogged sanitizer and no real extraction is not cleaning, and a quote that cleans but never treats is fine but leaves the growth question open. We do both, in the right order.
We run Rotobrush and Nikro extraction systems, the same class of equipment used by IAQ contractors across the country, not consumer-grade blowers. And we carry Abatement Technologies equipment for proper HEPA containment during the visit, which means dust disturbed during cleaning is captured rather than pushed into the rooms you’re trying to improve.
If your system also has a whole-home humidifier or filtration unit, or you’re considering one, we work with Honeywell and Aprilaire, two of the most recognized names in home air quality, and we can recommend and service those systems as part of the air quality scope.
How to Save on Air Quality & Sanitizing in St. Louis
There are a few practical ways to keep the number reasonable without trading away the work that matters.
- Bundle cleaning with the sanitizing treatment. Doing them together in one dispatch costs less than booking them separately, because the sanitizing step runs off the same setup.
- Add dryer vent cleaning in the same visit. It’s a separate service, but there’s no second trip and no second containment setup. It’s also worth doing on its own merits: a clogged dryer vent is a leading cause of residential house fires, and a dryer taking too long to cycle is usually the first sign.
- Get the repair done when it’s found. If we find a crushed run or a disconnected joint during cleaning, fixing it right then beats a second appointment. Leaky ducts and high air quality bills tend to travel together.
- Ask about filter upgrades as part of the same visit. A whole-home filtration or humidifier change is cheaper to add than to book later as its own visit. Worth asking if you’re already having the ducts serviced.
- Use the free estimate to plan. There’s no charge for an estimate and no obligation. Call (877) 349-6189 to set one up. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Is It Cheaper to Repair or Replace Ductwork?
For most homes in St. Louis, repairing specific problem areas (typically $250 to $900 per area) is notably cheaper than replacing an entire duct system. Replacement only makes sense when large sections are crushed, contaminated beyond cleaning, or the layout itself is the problem. A visit that opens up the system and diagnoses what’s actually going on usually settles that question before any money changes hands.
We can repair ductwork on the same visit as cleaning, which matters because the inspection is already half done. It protects the HVAC investment too: leaky ducts mean the equipment runs longer to reach the same temperature. Call (877) 349-6189 for an estimate on the repair scope.
FAQs About Air Quality & Sanitizing Cost in St. Louis
How much does air duct cleaning cost in St. Louis?
Full-system air duct cleaning in St. Louis typically runs $300 to $700 for a single-family home, based on the number of runs and accessibility. Then add sanitizing if you want the treatment: the combined figure is usually $550 to $900. Call (877) 349-6189 for an exact quote for your home. Estimates are free.
Do I need sanitizing if I’m getting my ducts cleaned?
Not always, but often worth it in St. Louis because of the humid summers and long heating seasons. Cleaning alone runs $300 to $700, and adding sanitizing brings it to $550 to $900. The treatment makes the most sense when there’s visible growth, a musty smell, or a recent renovation or moisture event. Our technicians can tell you what they find.
Is it cheaper to repair or replace ductwork?
Repair is almost always cheaper than replacement. A single repair area typically costs $250 to $900, while replacing a full duct system is a much larger project. If the ducts are structurally sound but compromised in places, repairing is the more sensible path. We diagnose and repair on the same visit we clean, so call (877) 349-6189 for an estimate.
How much does dryer vent cleaning cost in St. Louis?
Dryer vent cleaning typically runs $100 to $250, and it’s often less when bundled with a duct cleaning visit. It addresses a leading cause of residential house fires, and a dryer that takes too long to dry a load is usually the first sign. Call (877) 349-6189 for a free estimate.
Can you come out today?
Same-day service is often possible. Call (877) 349-6189. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. A call outside dispatch hours is booked into the next opening, Sunday through Friday, 7am to 7pm. Estimates are free either way.
What’s Included in a Professional Air Quality Visit
A proper visit is more work than a quick vacuum of the registers. The technician sets up containment, connects the extraction equipment to the main trunk and works through the runs, then checks for disconnects, crushed flex, and leaking joints. If a repair is needed, it’s fixed in the same visit. Then the sanitizing treatment is applied, and any filtration or humidifier questions get addressed.
We run a focused menu: air duct cleaning, dryer vent cleaning, and air duct repair. That’s it, because these three are what an indoor-air specialist should be doing. It’s how we keep the work thorough instead of spreading it thin.
If you’re exploring the wider St. Louis market for this kind of work, you can find more from the St. Louis service page or reach out through Bellmont Air Duct Cleaning. The number below goes straight to a team, not a call center.
Contact Us for a Free Air Quality Estimate in St. Louis
If your ducts haven’t been cleaned in a while, if you’ve just finished a renovation, if someone in the house has allergies, or if you’ve noticed a musty smell when the air kicks on, a free estimate is the sensible next step. Call (877) 349-6189. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. We’ll walk through what we find, what it’ll take, and what it’ll cost. No obligation, and no surprise on the invoice.
Pricing reflects the St. Louis market as of 2026. Bellmont Air Duct Cleaning offers free estimates – call (877) 349-6189.
Written by the team at Bellmont Air Duct Cleaning.
What Our Customers Say
"Did the dryer vent while they were here for a small add on price. The dryer now finishes a load in one cycle instead of two."
- Malik Bryant"Quoted per system rather than the bait and switch per vent pricing everybody else in town uses. The number I was told on the phone was the number on the invoice."
- Whitney Sutton"Fair price and thorough work. They ran about an hour and a half past the estimated finish time, so don't schedule anything tight after."
- Steve Norris