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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.
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AfterHow Much Does Air Quality & Sanitizing Cost in San Antonio?
Air quality and sanitizing services in San Antonio typically cost between $295 and $895 per treatment for a standard single-family home, with most homeowners paying around $450 to $650 for a full-system sanitizing that includes ductwork, the air handler, and the evaporator coil. The final price depends on home size, system accessibility, and the type of sanitizing method used. Morton’s Air Duct Cleaning provides a written price before any work starts, so families know the exact number before a single piece of equipment comes off the truck.
For homes in areas like Alamo Heights, Stone Oak, or Helotes, prices run slightly higher due to larger square footage and multi-zone systems. For older homes in neighborhoods like Monte Vista or King William, older ductwork and harder-to-reach air handlers can also add to the total. This guide breaks down exactly what families in San Antonio should expect to pay in 2026, with real numbers and no vague “it depends” hedging.
Air Quality & Sanitizing Cost Breakdown (2026)
Here is what a typical air quality and sanitizing job costs in the San Antonio market, broken down by the components of the work:
| Service Component | Typical Cost Range (San Antonio) | What It Includes |
|---|---|---|
| Full-system sanitizing (ducts, air handler, coil) | $395 – $695 | Application of EPA-registered antimicrobial product across all supply and return ductwork, the blower housing, and the evaporator coil |
| Ductwork-only sanitizing | $225 – $375 | Sanitizing of the main trunk lines and branch runs only, no air handler or coil treatment |
| Air handler and coil sanitizing | $185 – $295 | Direct treatment of the blower assembly, drain pan, and evaporator coil where moisture and microbial growth happen |
| Whole-home fogging treatment | $350 – $550 | Dry-fog application that reaches deep into duct runs and treats the entire HVAC system in one pass |
| Combined air duct cleaning + sanitizing package | $650 – $895 | Complete mechanical cleaning using Rotobrush and Nikro extraction equipment, followed by full-system sanitizing |
| UV light installation (add-on) | $400 – $800 | Honeywell or Aprilaire UV-C lamp installed at the coil, with lamp replacement needed every 1 to 2 years |
| Media filter upgrade (add-on) | $120 – $250 | Upgrade to a higher-MERV cabinet filter system from Aprilaire or Honeywell |
These numbers reflect the San Antonio market as of early 2026. Homes south of downtown, in areas like Jefferson and Harlandale, tend to have more compact single-story floor plans, which keeps sanitizing costs on the lower end. Homes in master-planned communities with longer duct runs, like Cibolo Canyons or Alamo Ranch, often land in the middle to upper range because those systems simply have more surface area to treat.
What Drives the Price Up or Down
Home size is the biggest lever. A 1,400-square-foot home in Woodlawn Lake will cost less than a 3,200-square-foot home in Terrell Hills, because the sanitizing solution has to reach more linear feet of ductwork. System configuration matters too. Multiple return grilles, zoned dampers, and two-story homes with hard-to-access attic units all require more time and more product. If the air handler sits in a tight closet or a low-clearance attic, technicians work slower and more carefully, which shows up in the final quote. Older homes in neighborhoods like Tobin Hill sometimes have ductwork with accumulated debris that requires mechanical cleaning before sanitizing can do its job properly, and that combination package is where most families land.
What Affects Air Quality & Sanitizing Pricing in San Antonio
Beyond square footage, several local factors shape what a San Antonio homeowner will actually pay:
- Home size and duct length. More duct runs mean more sanitizing product and more labor. A 1,800-square-foot single-story home is straightforward. A 3,000-square-foot two-story with dual systems is a different job altogether.
- Age and condition of the HVAC system. Systems with visible mold staining, heavy dust buildup, or standing water in the drain pan may require mechanical cleaning before sanitizing. That pre-cleaning step adds cost but makes the sanitizing itself far more effective.
- Access to the air handler. Attics in San Antonio are brutal in August. Attic-installed air handlers that are awkward to reach add labor time, and labor drives the quote.
- Number of HVAC systems. Some larger homes in the Dominion or Shavano Park have two completely separate systems. Each system needs its own sanitizing pass.
- Method chosen. Direct-application sanitizing costs less than whole-home fogging, but fogging reaches more surface area. For houses with persistent odor issues, like pet odor in the ducts or cigarette smoke residue from a previous owner, fogging is usually the right call, and it costs more.
- Seasonal scheduling. Spring and early fall are the busiest times in San Antonio. Booking during the slower winter months can sometimes mean faster appointment availability, though Morton’s keeps pricing consistent year-round with no seasonal surcharges.
One detail that does not affect price at Morton’s Air Duct San Antonio: surprises. Every job comes with a written price before the work starts, no exceptions. If the crew finds something unexpected, they stop and explain it before proceeding. That’s a non-negotiable part of the Cedarwell Care Promise, and it’s why families who have been burned before by “while we’re in there” add-ons tend to call us back.
Air Duct Cleaning vs. Air Quality Sanitizing: What’s the Difference in Cost and Scope?
Air duct cleaning is mechanical. Rotobrush and Nikro extraction equipment removes the dust, pet hair, pollen, and debris that settles inside the ductwork, and in San Antonio that debris often includes cedar pollen from the Hill Country and fine limestone dust that finds its way into every house. Air quality sanitizing is chemical and biological. After the mechanical cleaning removes the visible gunk, a sanitizing agent is applied to the interior surfaces of the duct system, the air handler, and the coil to reduce bacteria, mold, and odor-causing organisms. The two services are often combined, because sanitizing dirty ducts means treating dust instead of treating surfaces.
A standalone air quality sanitizing treatment without cleaning costs less in the moment, usually $295 to $550 for a standard San Antonio home. But our technicians are honest about the limitations. If the ducts carry a visible layer of dust and pet hair, the sanitizing product sits on top of that debris and evaporates without doing its full job. That’s why the combined package at $650 to $895 is the most common choice for families with kids, pets, or allergy concerns. It’s also the package that delivers the most noticeable difference in how the house smells and how the air feels in the days after the treatment.
We use professional-grade equipment from Rotobrush and Nikro for the mechanical side, and EPA-registered antimicrobial products from manufacturers like Abatement Technologies for the sanitizing side. The same care standards apply whether the job is a quick duct-only sanitizing pass or a full combined treatment. Shoe covers and drop cloths go down before anything else happens, and the crew works quietly enough that a napping toddler stays asleep.
How to Save on Air Quality & Sanitizing in San Antonio
Saving on air quality services is about timing, bundling, and maintenance. Here’s what actually moves the needle:
- Bundle cleaning and sanitizing. The combined package costs more than sanitizing alone, but it’s significantly less than paying for both as separate visits. It also saves the scheduling hassle of a second appointment.
- Change your filters consistently. A clean filter keeps the coil and ducts cleaner longer, which means sanitizing treatments hold their effectiveness for more time between services. We recommend checking filters monthly during San Antonio’s high-pollen spring and dusty winter furnace season.
- Ask about add-ons when you call. If you’re already getting ducts cleaned, adding sanitizing for the air handler and coil is a natural, lower-cost add-on compared to scheduling it as a standalone visit.
- Get the free estimate. Morton’s provides a written quote at no charge before any work begins. Call (903) 354-8393 and a real person answers, any hour, every day of the week. You’ll know the price before you decide anything.
San Antonio’s climate makes air quality maintenance a recurring need, not a once-a-decade event. Cedar and oak pollen season hits hard from December through April, and the humid Gulf-influenced summers keep relative humidity inside duct systems higher than most people realize. Moisture plus dark ductwork equals microbial growth, and that’s exactly what sanitizing treatments address. Families who keep a consistent schedule spend less over the long run because their systems never build up to the point of needing heavy intervention.
Is Air Quality & Sanitizing Worth the Cost?
For a family in San Antonio with kids in sports, pets that shed, or anyone with a pollen allergy, the answer is almost always yes. The cost of a sanitizing treatment, $295 to $895 depending on scope, is a fraction of what families spend on allergy medications, vet visits, and constant surface dusting over the years. It’s also a one-time cost that produces a difference you notice in the first week: the house smells neutral again, not like the ghost of last year’s cedar season.
But the value is not just the air. It’s the job being done correctly. Morton’s crews are background-checked and uniformed, and they work to the Cedarwell C.A.R.E. values on every visit. That means drop cloths under the work area, shoe covers at the door, pet-safe product choices where available, and a photo of the clean-up before the crew pulls out of the driveway. Paul Adeyemi, our owner, set that standard when Morton’s joined the Cedarwell family in 2005, and it hasn’t changed since. If something isn’t right, the 365-Day Done Right Promise means we make it right. No fine print, no arguing.
FAQs – Air Quality & Sanitizing Cost
How much does whole-home air quality sanitizing cost in San Antonio?
Whole-home sanitizing in San Antonio averages $450 to $650 for a standard single-family home, with a typical range of $295 to $895 depending on home size, number of rooms, and whether the air handler and coil are included in the treatment. The quote is written and final before we start. Call (903) 354-8393 for your exact number, free.
Is it cheaper to sanitize ducts or replace them?
Sanitizing is dramatically cheaper, at $295 to $895 versus $3,000 to $8,000 or more for full duct replacement in the San Antonio market. Unless the ductwork is physically damaged or collapsed, sanitizing and cleaning almost always makes more financial sense than replacement. Our technicians will tell you if they see damage that changes that math.
How much does air handler and coil sanitizing cost alone?
Treating the air handler and evaporator coil alone typically runs $185 to $295 in San Antonio. This is a common add-on when the ducts are already clean but the unit itself shows microbial growth, standing water in the drain pan, or the characteristic musty smell when the system kicks on. It’s also a smart follow-up if you notice a stale smell only when the AC runs.
How much does it cost to sanitize ducts after mold is found?
Full mold-focused sanitizing, which includes mechanical cleaning first and then antimicrobial treatment of all duct surfaces, the air handler, and the coil, runs $650 to $895 for a standard San Antonio home. If areas of mold are limited to the air handler or a single section of duct, the cost can be lower. Note: visible mold on drywall or framing is a separate issue from duct-surface microbial growth and falls outside the scope of air duct sanitizing. A qualified professional should always handle mold concerns.
How long does the sanitizing treatment last?
A properly applied sanitizing treatment in San Antonio typically holds its effectiveness for 12 to 18 months under normal conditions. Homes with multiple shedding pets, smokers, or ongoing humidity issues in the duct system may want to retreat annually. Proper filter maintenance extends the interval between treatments, which is the most practical way to stretch your budget.
Can you come today if we need a quote?
Estimates are always free, and a live person answers the phone 24/7 at (903) 354-8393. Same-day and next-day appointments are available in most cases, depending on the schedule and the time of year. You will know the written price before any work starts, every single time.
Get a Free, Written Air Quality & Sanitizing Estimate in San Antonio
If your San Antonio home could use a reset on indoor air, the next step is simple. Call (903) 354-8393 and tell us about your house, your system, and what you’ve been noticing. You’ll get a real conversation with a real person, a straightforward explanation of what we recommend and why, and a written price before any work begins. Whether you’re in Helotes, Converse, Universal City, or anywhere else in Bexar County, our crews arrive on time, in uniform, with shoe covers and drop cloths ready. And when the job’s done, you get a photo of the clean-up before we leave. That’s the Cedarwell Care Promise, and it’s been the standard at Morton’s Air Duct Cleaning since 2005.
You can also learn more about our specific Air Quality & Sanitizing in San Antonio service, or head back to our home page to explore everything we do.
Pricing reflects the San Antonio market as of 2026. Mortons Air Duct San Antonio offers free estimates – call (903) 354-8393.
Written by Paul Adeyemi, Owner at Mortons Air Duct San Antonio, serving San Antonio and Bexar County since 2005.
What Our Customers Say
"Friendly, calm crew that clearly cared about the house. Covered their shoes, protected the floors, and double checked they'd closed up every vent cover properly. Would have them back."
- Omar Zaid"New house, old dusty ducts. They were gentle in the house, laid down drop cloths, and double checked every register was sealed back up. Air smells fresh now."
- Scott Hemmings"With two kids and a dog the vents were overdue. The crew put down runners through the whole house and wore booties. Not a speck of dust left behind, and the air smells fresh."
- Paula Esposito