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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Before
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Before
AfterSupply Duct Cleaning in San Antonio, TX
Supply duct cleaning removes the dust, debris, and biological growth that accumulate inside the ducts that carry conditioned air from your HVAC system to every room in your home. In San Antonio, where systems run eight to ten months a year and attic temperatures regularly push past 130°F in July and August, supply ducts take a harder beating than in most U.S. markets – and a single neglected run can circulate contaminants through every register in the house. CleanRun Duct Repair & Cleaning has photographed and cleaned supply ductwork in San Antonio homes since 2013, and every our Air Duct Cleaning services job comes with a written price before a single panel comes off and a documented photo record when the crew leaves.
Supply ducts are the delivery side of your air system. The HVAC blower pushes conditioned air through the supply plenum – the main distribution chamber – and out through individual duct runs to each room’s supply register. Return ducts pull air back to the unit; supply ducts push it out. That distinction matters because supply duct contamination goes directly into the breathing air of every occupied room, not into a return cavity where some of it gets filtered before re-entering the system. If you’re not sure where supply duct cleaning fits within the full scope of your system, our Air Duct Cleaning in San Antonio page covers the complete picture.
To schedule a written quote with no obligation, call (726) 600-7155. A live person answers every call.
When You Need Supply Duct Cleaning
There’s no universal calendar interval that applies to every San Antonio home. What matters is what’s actually inside the ductwork. That said, certain conditions make supply duct cleaning a documented priority rather than a speculative upgrade.
- Visible dust discharge at supply registers. If you see a grey or brownish halo forming on the ceiling or wall around a supply vent, the debris load inside that run has reached the point where airflow is carrying particulate out with the conditioned air. In older neighborhoods like Alamo Heights and Olmos Park, homes with original flex-duct systems from the 1990s often show this pattern within a few years of the previous cleaning.
- Uneven room temperatures across the house. A partially blocked supply duct run – from debris accumulation at an elbow or collapsed flex – restricts airflow to one room while the system works harder everywhere else. We photograph the interior of every run before quoting any work, so you can see the actual restriction rather than take our word for it.
- Recent renovation or construction. Drywall dust, insulation fibers, and sawdust travel through an HVAC system faster than most homeowners expect. In fast-growing San Antonio suburbs like Stone Oak and Cibolo, new construction and active remodeling are constant – and construction particulate in supply ducts is one of the most common findings we document on camera.
- Evidence of moisture or mold in or around supply registers. San Antonio’s humidity isn’t as severe as Houston’s, but attic condensation issues are real, particularly in homes where supply ductwork runs through unconditioned attic space without adequate insulation wrap. Moisture inside a supply run creates conditions where biological growth can establish within weeks. The camera shows exactly what’s there – no guesswork.
- Moving into a home you didn’t build or own during the last cleaning cycle. The previous owner’s cleaning history is almost never transferable documentation. We’ve opened supply ducts in San Antonio homes that hadn’t been cleaned since original construction – sometimes more than fifteen years prior. The photo record from an initial inspection tells you exactly what you’re inheriting.
- Elevated allergy or respiratory symptoms with no identified cause. We don’t make medical claims, but supply duct contamination – pet dander, pollen, mold spores, and fine particulate – is a documentable environmental factor. The photograph from inside the duct either shows a problem or it doesn’t.
Our Supply Duct Cleaning Process
CleanRun’s supply duct cleaning follows a documented sequence on every job. Nothing is skipped to save time, and nothing is added without a written scope change. Here’s what happens from the moment our technician arrives to the moment they leave your San Antonio home.
- Pre-job inspection and written price delivery. Before any equipment comes off the truck, your technician walks the system – locating every supply register, checking the condition of the supply plenum, and identifying any visible damage at accessible connection points. The written price is delivered based on what the inspection finds, under Haven Standard Clause 1. You approve the number in writing before work begins. There is no “call for a quote” at CleanRun – the price is on paper before anything else happens.
- Pre-cleaning photography of every supply run. A camera goes into every accessible supply duct run and photographs the interior before cleaning. This is standard practice on every CleanRun job – not an add-on, not a premium tier. The before photographs become part of your job record. You can see the 3-inch debris accumulation at the first elbow, the collapsed section of flex-duct near the register, or the clean duct that didn’t need service. Documented evidence before we touch anything.
- Negative-pressure extraction setup. We use professional-grade equipment from Nikro and Rotobrush to establish negative pressure inside the duct system – meaning air is being drawn toward a contained collection point rather than pushed around. This is the technical difference between real duct cleaning and a shop-vac running near an open register. Negative-pressure extraction captures dislodged debris rather than redistributing it through the system. The collection equipment is sealed and HEPA-rated.
- Mechanical agitation of supply duct interiors. Rotary brushes – sized to the duct diameter – travel the length of each supply run, dislodging debris from the duct wall. On sheet-metal ducts common in San Antonio homes built before 2000, this step removes the compacted dust and biological matter that negative pressure alone cannot pull free. On flex-duct systems, brush selection is adjusted to avoid liner damage. Every brush pass happens under continuous negative pressure so dislodged material goes into the collection system, not your living room.
- Supply plenum and connection point cleaning. The plenum is where the air handler meets the supply distribution network. Debris concentrates here – particularly around the takeoffs where individual duct runs branch from the main chamber. We clean the plenum interior and photograph connection points where contamination or deterioration is found. If a takeoff fitting is loose or shows evidence of air bypass, that’s documented and flagged in the written job record.
- Post-cleaning photography and job record delivery. After extraction is complete, the camera goes back into every supply run that was cleaned. The after photographs are placed side-by-side with the before photographs in your job record. You receive this documentation as a standard deliverable – not because something went wrong, but because every CleanRun job since 2013 has concluded with a documented photo record. The record includes the written scope, the written price, and the photographs of every run. It’s yours to keep.
BeforeAfterSupply Duct Cleaning Pricing in San Antonio
For a detailed breakdown, see How Much Does Air Duct Cleaning Cost? (2026 Price Guide) - San Antonio, TX; supply duct cleaning in San Antonio typically costs between $199 and $499 for a standard residential system. The actual number depends on several factors specific to your home, and CleanRun puts that number in writing before starting – under Haven Standard Clause 1, every time.
| Home Size / Configuration | Typical Supply Duct Cleaning Range |
|---|---|
| Small home, 1 system, up to 10 supply runs | $199 – $279 |
| Mid-size home, 1 system, 11-18 supply runs | $279 – $379 |
| Larger home, 2 systems or 19+ supply runs | $379 – $499+ |
| Heavily contaminated runs (documented on camera) | Quoted after pre-job inspection |
What affects where your job lands in that range:
- Number of supply runs. A 1,400-square-foot home in Midtown San Antonio may have 10 supply registers. A 2,800-square-foot home in Shavano Park might have 22. More runs means more time, more brush passes, and more photographs – each of which is reflected in the written price.
- Duct material. Sheet-metal ductwork and flexible duct (flex-duct) are both common in San Antonio’s housing stock. Flex-duct runs common in post-2000 construction require different brush selection and typically take longer per linear foot than rigid sheet metal.
- Contamination level documented on pre-job camera inspection. A run with a moderate dust accumulation takes less time than one showing compacted debris, biological growth, or a collapsed section. Because we photograph before quoting final scope, you see exactly what drove the price – it’s not a gut estimate.
- Accessibility. Supply ductwork running through finished ceilings or interior walls in San Antonio’s older homes can present access limitations. If a run requires non-standard access, that’s documented and discussed before any work starts.
If you’ve already received a written estimate from another San Antonio duct cleaning company, CleanRun will put its own number in writing next to theirs at no cost – a Free Second Opinion, standard on every request. Call (726) 600-7155 to arrange it.
FAQs – Supply Duct Cleaning
What is a supply duct, and how is it different from a return duct?
A supply duct carries conditioned air from your HVAC system outward to each room through supply registers – the vents you feel air blowing from. A return duct carries room air back to the air handler to be filtered, conditioned, and recirculated. In practical terms, supply duct contamination goes directly into the air you’re breathing in each occupied room. Return duct contamination typically gets filtered before re-entering the supply side, though return-side buildup still strains the system. Cleaning both sides is part of a complete air duct cleaning job; supply duct cleaning specifically addresses the delivery side, and we often start with a Video Inspection to assess the full scope.
How much does supply duct cleaning cost in San Antonio?
Supply duct cleaning in San Antonio runs between $199 and $499 for most residential jobs, depending on the number of supply runs, the duct material, and the contamination level found on camera during the pre-job inspection - see How Much Does Air Duct Cleaning Cost in San Antonio, TX? (2026 Price Guide) for full pricing details. CleanRun delivers a written price before any work starts – Haven Standard Clause 1 means no estimate over the phone followed by a different number on the invoice. Call (726) 600-7155 and we’ll schedule an in-home inspection and written quote at no charge.
Can supply duct cleaning improve airflow to rooms that aren’t getting enough air?
Yes, if the restriction is caused by debris accumulation inside the duct. A partially blocked supply run – particularly at elbows where dust and debris tend to settle – can reduce airflow to a room measurably. In San Antonio’s older neighborhoods like King William and Monte Vista, we regularly find debris accumulation at the first elbow of flex-duct runs that’s restricting airflow by 30 to 50 percent before cleaning. The before and after photographs document the change. If the airflow problem is caused by a damaged or disconnected duct rather than contamination, that’s a duct repair issue – also something CleanRun handles with a written scope and written price before touching anything.
How long does supply duct cleaning take?
Most residential supply duct cleaning jobs in San Antonio are complete in two to four hours. A small home with one system and ten supply runs is typically done in under two hours. A larger two-system home in a neighborhood like Dominion or Stone Oak with twenty-plus supply runs will run closer to three to four hours. The pre-job camera inspection and post-job photography are included in that window – they’re not add-ons that extend the timeline, they’re part of the standard job. Your technician can give you a more precise estimate after the initial walkthrough.
What’s Included in Every CleanRun Supply Duct Cleaning Job
Some of this is worth stating plainly because the San Antonio market has no shortage of companies that offer a low entry price and then build the actual job around add-ons. Here is what CleanRun includes as standard on every supply duct cleaning job in San Antonio:
- Written price before any work starts – every time, no exceptions, under Haven Standard Clause 1
- Pre-cleaning photograph of every accessible supply duct run interior
- Negative-pressure extraction using professional-grade equipment
- Rotary brush agitation sized to the duct diameter, under continuous negative pressure
- Supply plenum cleaning and connection-point inspection
- Post-cleaning photograph of every run that was cleaned
- Delivered job record: written scope, written price, before-and-after photo documentation of every run
- 365-Day Done Right Promise – if the work isn’t right, CleanRun makes it right, in writing, no manager-approval loop
- Background-checked, uniformed technician identified by name before arrival, under Haven Standard Clause 3: Verified Crews
CleanRun has operated this way on every job since 2013, across more than 52,000 San Antonio-area homes. The documentation isn’t a marketing feature – it’s the job. A before photograph without a matching after photograph isn’t a completed job at CleanRun, and the 365-Day Done Right Promise is a written guarantee attached to the job record, not a policy that requires a manager to approve.
Why San Antonio Supply Ducts Need Specific Attention
San Antonio’s climate creates conditions that accelerate supply duct contamination in ways that don’t apply to most of the country. The HVAC season here runs from roughly April through October at full load, with many homes running cooling systems well into November. That extended runtime means the blower is moving air – and whatever is suspended in it – through supply ductwork for more hours per year than systems in Dallas, Chicago, or Denver.
Attic-run supply ductwork is the norm in the majority of San Antonio homes, from the postwar bungalows in Mahncke Park to the large two-story builds in Alamo Ranch. In July and August, unconditioned attic spaces in San Antonio regularly reach 130°F to 140°F. Flex-duct insulation degrades faster under those temperature swings, and the seals at takeoff fittings can loosen over time – creating both air bypass and entry points for attic dust and insulation fibers. None of that shows up in a visual inspection from below the ceiling. It shows up in the camera photograph of the duct interior.
Cedar pollen is also a specific San Antonio factor. Every January and February, mountain cedar pollen concentrations in San Antonio are among the highest recorded anywhere in North America. Homeowners running their systems during peak cedar season draw pollen through the air handler and into the supply ductwork. We document this regularly on camera inspections done in February and March – and in homes where return filtration is inadequate, cedar pollen can be visibly present inside supply runs after a single heavy pollen season.
For a full overview of how supply duct cleaning fits within the broader scope of your system, visit our home page or review the complete Air Duct Cleaning in San Antonio service page.
Schedule a Written Quote for Supply Duct Cleaning in San Antonio
If you want to know what’s inside your supply ductwork before deciding anything, that’s the right starting point. CleanRun puts a camera in every run and delivers the photographs before quoting scope. The written price comes before any work starts. The job record – with before-and-after documentation of every supply run – comes when the crew leaves.
To schedule a written estimate for supply duct cleaning at your San Antonio home, call (726) 600-7155. A live person answers every call. If you have a written estimate from another company, bring it – CleanRun will put its own number next to it in writing, at no cost, as part of the Free Second Opinion program.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning San Antonio, serving San Antonio since 2013.