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.
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Before
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Before
AfterSupply Duct Cleaning in Austin, TX
Supply duct cleaning in Austin typically runs $350 – $650 for a standard single-family home, and most jobs are completed in 3 – 5 hours. Supply ducts are the pressurized side of your HVAC system – the network of metal or flex tubes that carry conditioned air from your furnace or air handler into each room. When those ducts are dirty, every breath of cooled or heated air travels through that buildup before it reaches you.
At Cardinal Air Duct Austin, we clean supply ducts with professional-grade equipment – Rotobrush rotary brush systems, Nikro HEPA-filtered vacuum extraction, and Abatement Technologies negative-air containment – not a truck-mounted shop-vac with a weak hose. The difference matters: our setup applies mechanical agitation to the duct walls and pulls loosened debris into a sealed, filtered airstream, so it isn’t recirculated into your home. If you’re looking for a broader service, we also handle full-home Air Duct Cleaning, which covers supply runs, return runs, and the plenums as one system.
You can call (940) 283-6595 any time for a free estimate. A live person answers – no voicemail loops, no callbacks tomorrow.
When You Need Supply Duct Cleaning
Most Austin homeowners call us when something stops feeling right in the air. Here are the six most common scenarios that send people to this page:
- White or gray dust film on furniture 1 – 2 days after cleaning. If you dust Sunday and it’s back by Tuesday, your supply ducts are likely pushing fine particles into the room every time the system cycles. This is the number-one caller complaint in Mueller, Allandale, and Westlake Hills.
- Weak airflow from specific vents, not the whole house. A partially blocked supply run – often from construction debris or a collapsed flex duct section – starves one or two rooms while other vents blow strong. If one bedroom is constantly 6 – 8 degrees warmer than the hallway, that’s a supply-side restriction, not a thermostat issue.
- Renovation or new construction dust. Austin’s remodeling market has been relentless for a decade, and drywall dust plus sawdust get pulled into open supply registers during sheetrock work. New builds in Easton Park and Whisper Valley are notorious for construction debris left in duct runs before the first owner moves in.
- Visible dust puffing from registers at startup. When the blower kicks on, a momentary puff of dust from the supply register tells you the duct interior has accumulated loose particulate. That puff is literally the contents of your ducts saying hello.
- Musty, stale, or “sneezy” air when the AC runs. Lime-stone-heavy soils in Central Texas hold moisture, and Austin’s humidity means duct interiors can develop biological growth in the supply runs – especially if condensation forms on the outside of flexible duct in unconditioned attics. If allergies flare only when the system runs, the supply path is a prime suspect.
- Rodent or pest activity in the attic. Austin neighborhoods with mature oak canopies – Tarrytown, Hyde Park, Crestview – see roof rats and squirrels chewing into flex duct. If you’ve heard scratching above the ceiling, your supply runs may now contain nesting material and droppings that get aerosolized every time the blower runs. This is not just unpleasant, it’s a health issue we take seriously.
Our Supply Duct Cleaning Process
Here’s exactly what happens when Cardinal Air Duct Austin cleans your supply ducts. No ambushes, no shortcuts, no upsell pressure at the door.
- Walkthrough and camera inspection. We start by walking the home with you, checking register placement and airflow, and running a small inspection camera into representative supply runs. You see what we see – before photos are taken either way.
- Containment set up. We seal supply registers in the rooms to create a closed-loop air path, and we connect an Abatement Technologies negative-air unit to the supply plenum before we do anything else. Negative pressure means every bit of loosened debris flows toward the vacuum, not back into the house through a register we might have missed.
- Mechanical agitation with the Rotobrush system. A motorized rotary brush scrubs the interior walls of each supply run, from the plenum takeoff out to every register. This knocks loose the caked-on dust film, pollen deposits, and construction debris that a plain vacuum pull alone won’t dislodge.
- HEPA-filtered extraction. As the brush works, the Nikro vacuum system pulls the airborne debris through HEPA filtration – capturing particles down to 0.3 microns. The expelled air is cleaner than the room air around it. Nothing is vented into your attic or blown through your living space.
- Register and grille detailing. We remove, clean, and sanitize each supply register, then re-seat them with proper sealing. We also check for loose or separated duct joints where air might be leaking into the attic – a common culprit in older South Austin pier-and-beam homes.
- After-photos and written report. You get before-and-after photos of the work, a plain-English summary of what we found and what we did, and a digital invoice payable from your phone. The price we quoted before starting is the price you pay. Period.
Supply Duct Cleaning Pricing in Austin
Let’s talk numbers, because vague pricing is the fastest way to lose trust in this industry. For supply duct cleaning as a focused service in Austin, here’s what we see:
| Scope | Typical Range | What’s Included |
|---|---|---|
| Supply runs only (small home, 6 – 8 vents) | $350 – $450 | All supply ducts, registers, and plenum takeoffs |
| Supply runs only (typical Austin home, 9 – 14 vents) | $450 – $600 | Same as above, plus leak inspection at accessible joints |
| Supply + return + air handler | $600 – $850 | Full system – often the better value for most homes |
| Add-on: sanitizing fog treatment | $95 – $175 | Post-clean, EPA-registered antimicrobial fog |
| Add-on: flea/tick or rodent remediation decontamination | $150 – $350 | After pest-affected ducts – applied before standard cleaning |
What moves the price up or down: the number of supply runs (not always the same as the number of registers), accessibility of the attic or crawlspace, whether flex duct has collapsed sections that need repair, and whether there’s pest contamination requiring decontamination first. Homes with two HVAC systems – common in larger North Austin builds – add cost because you’re effectively cleaning two separate duct systems.
Every quote we give is written, itemized, and locked before work starts. You’ll never get a “by the way” increase once we’re in the attic. And a live person answers (940) 283-6595 around the clock to talk about your specific house.
Why Supply Ducts Get Dirty Faster in Austin
Austin’s climate and terrain do specific things to duct interiors that you won’t see on a generic national website. Knowing them matters when you’re deciding whether your supply ducts need attention.
First: limestone and caliche. The soil around the Balcones Escarpment is high in fine alkaline dust. Construction sites – and Austin has had continuous construction for years – throw that dust into the air. It settles on your returns, gets pulled into the system, and deposits along supply duct walls. Homes near active developments in Cedar Park, Leander, East Austin, and south toward Buda see duct linings coated with construction dust within a year or two of a new build.
Second: attic temperatures. Our summer attics routinely hit 140°F. Flexible duct in that heat becomes pliable, and if the duct runs weren’t strapped or sized correctly at install, the inner liner can sag or separate, creating pockets where debris collects and never gets blown out. We find this constantly in 1990s-era tract homes like those in Round Rock and Pflugerville.
Third: humidity and biological growth. Austin’s relative humidity hovers high for much of the year, and supply ducts in unconditioned spaces can sweat if insulation is thin. That damp interior surfaces traps dust, which then becomes a medium for mildew growth. You’ll notice this as a musty smell specific to when the blower starts. Our cleaning process removes that organic buildup, and the fog treatment we offer prevents regrowth for up to a year in most homes.
What Matters More: Cleaning Supply Ducts or the Whole System?
This is a fair question, and the honest answer depends on how your system is laid out. Supply ducts carry air from the unit into your rooms. Return ducts carry room air back to the unit. When we see heavy supply-side buildup, the return side is almost never clean either, because the fine dust that ended up in your supply runs passed through the return path to get there. For most Austin homes, a full-system cleaning – supply, return, plenums, and the blower cabinet – gives you a better outcome per dollar.
But there are cases where a supply-only service is all you need. If you recently had returns cleaned elsewhere or the returns are relatively short and accessible, a focused supply duct cleaning can be the most economical way to solve a specific issue like one room with weak airflow or visible dust from certain registers. We’ll tell you what we think after the video inspection, and we’ll never sell you a service you don’t need. The Relay Standard means you see what we see before deciding.
FAQs – Supply Duct Cleaning
How much does supply duct cleaning cost in Austin?
Supply duct cleaning in Austin runs $350 – $650 for most homes, depending on the number of supply runs, accessibility, and whether pest decontamination is needed first - check our How Much Does Air Duct Cleaning Cost in Austin, TX? (2026 Price Guide) for a full breakdown. Smaller homes with 6 – 8 vents sit at the low end; two-system homes or heavily contaminated ducts push toward the upper end. Call (940) 283-6595 for a written, locked quote – estimates are free.
Is it cheaper to clean only supply ducts instead of the whole system?
Yes – a supply-only cleaning usually runs about 40 – 50% less than a full-system cleaning, because we’re not opening the return side or the air handler cabinet. But if your returns are visibly dirty or you’ve never had the full system cleaned, the supply-only price might be a short-term savings that leaves half the problem in place. We’ll show you camera footage of both sides before you commit, and we’ll never upsell you past what the evidence supports. Call (940) 283-6595 to talk it through.
How long does supply duct cleaning take?
Most supply duct cleaning jobs in Austin take 3 – 5 hours, with smaller homes trending toward the low end and two-system homes or pest-contaminated ducts taking longer. We’ll give you a defined arrival window when you book, and under The Relay Standard you can track our live arrival time from your phone.
Will supply duct cleaning help my allergies?
Supply duct cleaning removes the accumulated dust, pollen, and biological material that gets blown into your living spaces every time the AC or heat runs – so many Austin allergy sufferers report noticeable relief within days. The key is using HEPA-filtered extraction so we’re capturing the debris, not recirculating it. We run Nikro HEPA vacuums on every job. For homes with serious allergen concerns, we also recommend upgrading to an Aprilaire or Honeywell media filter, which we can install at the time of cleaning.
Written by Omar Haddad, Owner at Cardinal Air Duct Austin, serving Austin.