Whole-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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AfterFast, Reliable HVAC Cleaning Across San Antonio
Air Duct Cleaning - San Antonio means cleaning the entire air pathway: return ducts, supply ducts, air handler, blower, and coils. Most standard systems here run $350 – $650 for a full cleaning, with larger two-story homes or systems with long trunk runs landing closer to $700 – $900. We’re Cardinal Air Duct Cleaning, part of the Relay Home Co. family, and we serve every corner of San Antonio with one flat price per system agreed in writing before a single duct is touched. Call (737) 727-2314 and a live person answers, day or night.
Why Cardinal Air Duct Cleaning Is San Antonio’s Preferred HVAC Cleaning Company
Our HVAC Cleaning team works in San Antonio daily, and we know what sits inside these systems because we’ve seen it over and over. Limestone dust from dry spells, caliche from construction, pet hair, pollen from the Hill Country oak and juniper cycles, and sometimes evidence of rodents that found their way into a crawlspace. That’s the honest reality of HVAC Cleaning in San Antonio.
Every job is backed by the 365-Day Done Right Promise: if the work isn’t right within a full year, we return and correct it at no charge. That’s not a limited offer. It applies to every booking, no exceptions. Our technicians are background-checked, uniformed, and carry professional equipment: Rotobrush rotary brush systems, Nikro HEPA vacuum extraction, and Abatement Technologies containment units. You’ll know the tech’s name before they open the door, and you’ll get a live trackable arrival window through The Relay Standard.
Furnace Duct Cleaning in San Antonio
Furnace Duct Cleaning in San Antonio homes typically runs $350 – $550 for a single system, and the job involves source removal at the trunk line, not just a quick vacuum at the registers. In older inner-loop neighborhoods like Monte Vista and Alamo Heights, we often find furnace ducts that haven’t been opened since the system was installed decades ago. Those runs collect more than dust – insulation fragments, construction debris from remodels along Broadway, and the fine limestone powder that settles out of dry air every time a cold front kicks up dust.
What We Actually Do
We set negative pressure at the trunk so loosened debris goes straight into the HEPA vacuum, not back into your living room. Then our techs work the duct walls with agitation tools from the air handler back toward the registers. On pier-and-beam homes near Olmos Park and Terrell Hills, we also check the return collar at the plenum, because that’s where crawlspace air gets pulled in when a duct has shifted.
When It’s Time
You don’t need furnace duct cleaning every fall because a calendar says so. You need it when a camera inspection shows real loading, after a remodel that filled the house with drywall dust, or after rodents have used the crawlspace as a highway. A quick look with a scope tells us whether the job is worth doing or whether your system is honestly clean enough to leave alone another year.
AC Coil Cleaning in San Antonio
AC Coil Cleaning in San Antonio usually runs $120 – $250 when done as part of a full HVAC cleaning, and it matters here more than in most Texas cities because our air conditioners run nearly year-round. The evaporator coil sits directly in the airstream. When limestone dust and caliche coat the coil face, the system loses cooling capacity, runs longer cycles, and pushes the blower motor harder. We see this constantly in homes across the 78209 and 78212 zip codes where attic air handlers pull return air through unconditioned spaces.
Evaporator Coil Cleaning
This is the coil inside the air handler, the one that gets cold. Cleaning it involves removing the access panel, applying a proper coil cleaner, and rinsing in place while protecting the blower and control board. On homes like those off Hildebrand near the Olmos Basin, where attic air handlers run hot, a dirty coil is often the difference between a system that holds 72 degrees and one that struggles at 78.
Condenser Coil Cleaning
The condenser is the outside unit, and San Antonio’s cottonwood season plugs these fast. We pull the top off, flush the fins with low-pressure water, and clear any debris sitting in the base. A clogged condenser coil forces the compressor to run hotter, and San Antonio summers are already hard enough on compressors. Clean coils on both sides of the line set the whole system up to work less.
Trusted Brands We Service in San Antonio
San Antonio Trane service, Carrier, Lennox, Rheem, Goodman, American Standard – if it’s in a San Antonio home, we’ve worked on it. We keep common replacement parts in stock locally: condensate drain pans, filter frames, coil cleaner, and Guardsman filtration products. For filtration we often recommend Aprilaire media filters, and for containment on dusty jobs we run Abatement Technologies units. Waiting on a part shipped from Dallas means another day without clean air. Most San Antonio jobs wrap in one visit because we carry what the work actually needs.
Common HVAC Cleaning Problems We See in San Antonio Homes
- Return-side leaks on pier-and-beam homes. Crawlspaces under older homes near the Olmos Basin and Tobin Hill run humid and cool, and separated duct collars there pull musty air and sometimes rodent debris straight into the air handler.
- Supply-side cracks from attic heat. San Antonio attics hit 140°F+ in July and August. The same system can have a cool, dusty return leak in the crawlspace and a heat-cracked supply leak in the attic at the same time. Both need eyes on them.
- Limestone dust loading in return ducts. Dry springs and construction dust from neighborhoods like Stone Oak and the far West Side push fine caliche into return grilles. It settles in the trunk lines, and surface vacuuming at the registers never touches it.
- Coil faces caked after allergy seasons. Juniper in winter, oak in spring, and cottonwood in early summer pile onto evaporator coils. That coating cuts airflow and cooling, and it’s one of the most common reasons San Antonio systems run longer and break sooner.
We ran an HVAC cleaning on a pier-and-beam home off Hildebrand near the Olmos Basin, where the air handler sits in the attic and the supply and return ducts run through a crawlspace that a possum had been using as a highway. Our tech found a separated collar at the return plenum pulling crawlspace air (and a little wildlife debris) into the system, so we set negative pressure at the trunk, worked source removal back to the air handler with agitation tools, sealed the collar, and left the homeowner before-and-after camera inspection photos of their own ducts on the receipt. The blower motor amp draw dropped noticeably on the second reading once the lint pathway and coil face were cleared.
Pricing for HVAC Cleaning in San Antonio, TX
| Service | Typical San Antonio Range |
|---|---|
| Furnace duct cleaning (single system) | $350 – $550 |
| Full HVAC cleaning (ducts + air handler + coils) | $450 – $750 |
| AC coil cleaning (evaporator or condenser) | $120 – $250 |
| Larger two-story or long-trunk systems | $700 – $900 |
Those are honest ranges for the San Antonio market, and the price you get is a written flat rate per system before any work starts. No per-vent billing. No open tab when the tech finds a long run to a far bedroom or an added sunroom. The number on the quote is the number on the invoice. Estimates are free, and a live person answers (737) 727-2314 any time.
We Also Serve Cities Near San Antonio
Our crews handle San Antonio proper plus the surrounding communities: Converse, Universal City, Schertz, and Helotes. If you’re on the Northeast Side around Universal City or out toward Helotes, the same flat per-system pricing and the 365-Day Done Right Promise apply without exception.
Serving San Antonio, TX - Our Local Coverage Area
We’re based in the San Antonio area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About HVAC Cleaning in San Antonio
No. Most San Antonio homes don’t need HVAC cleaning on a calendar. A camera inspection shows when there’s real loading: after a remodel, after rodent intrusion in the crawlspace, or when you can see dust accumulation at the supply registers that doesn’t respond to filter changes. If a company says every home needs it every year, that’s a sales pitch, not a diagnosis. Call (737) 727-2314 and we’ll tell you honestly whether it’s time.
In San Antonio, attic air handlers sit in 140°F+ spaces for much of the summer, so duct runs cross unconditioned attics on most single-story builds. That heat stresses flex duct, cracks collars, and accelerates the failure of tape and mastic. It also means an attic-sourced leak pulls in superheated attic air, and that air never gets filtered. This is why we inspect every accessible duct run when we do our HVAC Cleaning in San Antonio, not just the air handler itself.
It covers the entire HVAC cleaning job for your system: return and supply ductwork, the air handler, the blower assembly, and both coils when they’re part of the job. The price is written down before work starts and it does not change at the door. No per-vent math, no add-on charges when the technician discovers a long run or a second return. If you want an exact number for your system, call (737) 727-2314 for a free estimate.
We use negative-pressure extraction with Nikro HEPA vacuums, meaning the system is put under vacuum at the trunk so loosened debris gets pulled into the vacuum rather than pushed out of the registers into your living space. We also contain the work area with Abatement Technologies containment units on dusty jobs. Before-and-after photos of your own ducts are included, so you can see the work was actually done.
Yes, and it should be. A dirty evaporator coil in a San Antonio attic is the most common cause of reduced cooling and longer run times we see. When you book a full HVAC Cleaning, the coil is part of the job unless it’s unusually difficult to access. If it’s a standalone coil cleaning, expect $120 – $250. The coil face is one of the first things our techs inspect and photograph before and after.
We schedule HVAC cleaning across San Antonio throughout the week, and our scheduling is coordinated from our San Antonio office, so we’re not routing techs from another metro. You get a live trackable arrival window through The Relay Standard, not a four-hour guess. Call (737) 727-2314 and we’ll give you the next available slot for your part of town.
Every job is covered by the 365-Day Done Right Promise. If the work isn’t right within 365 days, we come back and correct it at no charge. That covers every booking without exception, and every repair also carries a written guarantee with a free second visit if the repair fails. The promise is the same in Converse, Universal City, Schertz, Helotes, and every San Antonio neighborhood.
Call for a Free HVAC Cleaning Estimate in San Antonio
If you live in Monte Vista, Alamo Heights, Terrell Hills, Stone Oak, the far West Side, or anywhere else around San Antonio, call (737) 727-2314 for a straight answer on what your system needs and what it will cost. A live person picks up. You’ll get a written flat rate per system before any work starts, before-and-after photos of your own ducts, and a full year of coverage under the 365-Day Done Right Promise.
Written by Omar Haddad, Owner at Cardinal Air Duct Cleaning, serving San Antonio, TX.