Whole-home duct cleaning
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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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Before
AfterSupply Duct Cleaning in San Antonio, TX
Supply duct cleaning in San Antonio typically costs between $290 and $550 for a standard single-family home, with most jobs completed in 3 to 5 hours. To learn more, see How Much Does Air Duct Cleaning Cost in San Antonio, TX? (2026 Price Guide). The supply ducts are the network of metal or flexible tubes that carry conditioned air from your HVAC system into every room of your house. When those ducts are loaded with dust, pet dander, and construction debris, you’re breathing whatever the system pushes through them, every time the AC or furnace kicks on.
At Cardinal Air Duct San Antonio, we clean supply ducts as a focused service for homeowners who’ve noticed weak airflow in specific rooms, visible dust around supply registers, or a stale smell when the system runs. Omar Haddad and our team use professional-grade equipment from Rotobrush and Nikro to pull debris out of the ductwork instead of pushing it around. Call (254) 347-3897 for a free estimate, and we’ll hand you a written price before any work starts. If you’re looking for a full-system cleaning that includes return ducts, plenums, and the air handler, see our complete Air Duct Cleaning in San Antonio page.
Key Takeaways
- Supply duct cleaning in San Antonio runs $290 – $550 for most homes, with a written price before work begins.
- Supply ducts carry conditioned air to your rooms; dirty supply ducts mean dust and allergens are actively blown into your living spaces.
- Symptoms that point to supply duct buildup include weak airflow from certain vents, dust streaks on walls near registers, and musty odors when the blower runs.
- Cardinal Air Duct San Antonio uses Rotobrush rotary brush systems and Nikro HEPA-rated vacuum extraction, not shop-vac shortcuts.
- Every job carries the 365-Day Done Right Promise: if the work isn’t right within a year, we return and correct it at no charge.
When You Need Supply Duct Cleaning
The supply side of your duct system is the delivery network. Air leaves the air handler, travels through the supply plenum, splits into branch ducts, and exits through registers in your ceilings, walls, or floors. When those pathways are restricted by buildup, your system works harder and delivers less. Here are the scenarios we see most often across San Antonio neighborhoods, from Alamo Heights to Stone Oak to Helotes:
- Dust accumulating quickly on furniture near supply vents. If you dust on Sunday and see a film by Wednesday, the supply ducts are most likely blowing particulates into the room. We see this constantly in Leon Valley and older Castle Hills homes where ducts haven’t been opened in a decade or more.
- One or two rooms that never reach the thermostat temperature. A supply duct partially blocked by debris or collapsed flex duct in the attic reduces airflow to specific rooms. The Master bedroom in a two-story Terrell Hills home is the classic example: the longest duct run, often the most neglected.
- Visible dust or debris inside the supply register. Pull a register cover off and shine a phone flashlight down the duct boot. If you see gray fuzz, construction scraps, or what looks like dryer lint, that’s what the blower is pushing toward your living space.
- A musty or stale odor that only appears when the AC or heat runs. Supply ducts in San Antonio attics get hot and humid in summer. When dust and organic material sit in that environment, the air moving through picks up the smell and delivers it to every room.
- Post-construction or post-renovation dust. Drywall dust, sawdust, and insulation particles settle in supply ducts during remodels. If you’ve recently renovated a kitchen or bathroom in a Shavano Park or Boerne-area home, that dust recirculates for months unless the supply ducts are cleaned.
Supply duct cleaning is also worth considering if you’ve had a pest issue in the attic. Rodent droppings and nesting material in ductwork aren’t just unpleasant, they’re a health problem, and the supply side is where contaminated air exits into your rooms. Whatever the trigger, call us at (254) 347-3897 and we’ll tell you honestly whether supply duct cleaning is the right fix or if a full-system cleaning is the better value.
Our Supply Duct Cleaning Process
We clean supply ducts with our Air Duct Cleaning services using a method called source removal, which is the standard the National Air Duct Cleaners Association (NADCA) recommends. That means we remove debris from the duct walls and interior surfaces, not just loosen it and hope the system flushes it out. This matters in San Antonio because our attics hold a lot of fine particulate, soil dust from drought years, and insulation fibers. Here’s exactly how our technicians work:
- Inspection and written price. We evaluate the supply duct runs, register locations, and access points in your attic. You get a written price before we touch anything. That price does not change at the door. We’ll also note any collapsed flex duct, disconnected boots, or damaged sections that need attention.
- Containment and protection. We place Abatement Technologies containment barriers where needed and protect flooring and furniture around each register. Every technician is background-checked, uniformed, and arrives with the equipment ready to go. You’ll know the tech’s name before they arrive, thanks to The Relay Standard booking experience.
- Rotary brush agitation. Using the Rotobrush system, we run a rotating brush through each supply duct run, from the register boot back toward the supply plenum. The brush mechanically scrapes dust film and debris off the duct walls, including the stubborn buildup that a vacuum alone can’t remove.
- HEPA-rated negative-pressure extraction. A Nikro HEPA vacuum is connected at the supply plenum, creating negative pressure throughout the supply side during cleaning. Negative-pressure extraction means any loosened debris gets pulled toward the vacuum and captured in the HEPA filtration system, not blown back into your living room.
- Register and boot cleaning. We remove, clean, and reinstall each supply register cover. The boot, the transition piece where the duct meets the register, gets the same brushing and vacuum treatment. Boots are the most common place for people to see dust, because it’s the first thing visible when you look at the register.
- Photo documentation and walkthrough. Before-and-after photos of the supply ducts and register boots are included with every job through The Relay Standard. You’ll see proof of the work, and we’ll walk you through what was removed before we pack up.
Most supply duct cleanings are completed in 3 to 5 hours, depending on the number of runs, the accessibility of the attic, and the level of buildup. We don’t rush it, and we don’t pad the clock. You pay the written price we quoted, and the job is backed by our 365-Day Done Right Promise: if the work isn’t right within a full year, we return and correct it at no charge. No fine print, no prorating, no “this repair was excluded” conversations.
Supply Duct Cleaning Pricing in San Antonio
Supply duct cleaning in San Antonio homes typically runs between $290 and $550. That range covers most single-family houses up to about 3,500 square feet with accessible attic ductwork. If you’re also having the return ducts, plenums, and air handler cleaned, the full Air Duct Cleaning in San Antonio service usually falls between $400 and $800 depending on system size and the number of returns. Here’s the price breakdown so you can plan:
| Scope of Work | Typical Price Range | What’s Included |
|---|---|---|
| Supply ducts only (up to 10 runs) | $290 – $390 | Rotary brush cleaning, HEPA extraction, register cleaning, before/after photos |
| Supply ducts (11 – 18 runs) | $350 – $490 | All of the above plus boot cleaning at every register |
| Supply ducts on larger two-story homes | $450 – $550 | Longer runs, additional registers, harder attic access |
| Full system (supply + return + plenums + air handler) | $400 – $800 | Complete NADCA-standard source removal, air duct cleaning coverage |
Three main factors affect your supply duct cleaning cost. First, the number of supply runs and registers: a 4-bedroom home with 12 supply vents costs more than a 2-bedroom with 7. Second, attic accessibility: spray-foam attics, low-clearance areas, or ductwork buried under blown-in insulation adds labor time. Third, the condition of the ducts: if flex duct is collapsed, disconnected at boots, or torn, repairs are quoted separately and in writing before we do them.
We don’t charge by the hour and spring extra fees at the end. The written price you receive before work starts is the price you pay. That’s the Cardinal standard, and it’s the same approach we take on every job, whether it’s supply duct cleaning, dryer vent work, or a full HVAC cleaning. Call (254) 347-3897 and we’ll give you an honest range for your home over the phone, then confirm it in writing on site.
FAQs – Supply Duct Cleaning
How much does supply duct cleaning cost in San Antonio?
Supply duct cleaning in San Antonio costs between $290 and $550 for most single-family homes, depending on the number of supply runs, attic access, and duct condition. That price includes rotary brush cleaning with Rotobrush equipment, HEPA-rated extraction with Nikro vacuums, register and boot cleaning, and before-and-after documentation. Call (254) 347-3897 for an exact quote for your home, no obligation.
What’s the difference between supply duct cleaning and full air duct cleaning?
Supply duct cleaning focuses only on the ducts that carry conditioned air from your HVAC system into your rooms. Full air duct cleaning in San Antonio includes supply ducts, return ducts, the supply and return plenums, and often the air handler cabinet and blower. If your returns are pulling air through dirty ductwork, that dust gets drawn through the filter and redistributed, so many homeowners do the complete system at once. We’ll show you what each duct run looks like before you decide.
How do I know if my supply ducts need cleaning?
Check for dust accumulating quickly on surfaces near supply registers, visible debris when you remove a register cover, rooms that never reach the thermostat setting, or a musty smell that appears only when the blower runs. Any one of these points to supply duct buildup. We’ll confirm with a Video Inspection during your free estimate and show you photos of what we find.
Can you clean supply ducts without cleaning the return side?
Yes, supply duct cleaning can be done as a standalone service, and for many San Antonio homes it’s the right starting point. If the return ducts look clean and the filter has been changed regularly, supply-only cleaning solves the problem at a lower cost. We’ll give you an honest recommendation after looking at both sides. Call (254) 347-3897 to schedule a free inspection and quote.
How long does a supply duct cleaning take?
Most supply duct cleanings take 3 to 5 hours from arrival to final walkthrough, depending on the number of supply runs and how much buildup is present. Single-story homes with 7 to 10 supply registers usually fall closer to 3 hours. Homes with long attic runs, multiple stories, or heavy dust load from construction take longer, and we’ll tell you the expected time when we quote.
Ready to breathe cleaner air? Call Cardinal Air Duct San Antonio at (254) 347-3897 for a free supply duct cleaning estimate. We’ll give you a straight answer on whether you need supply-only cleaning or a full system service, plus a written price you can count on.
Written by Omar Haddad, Owner at Cardinal Air Duct San Antonio, serving San Antonio.