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 Air Duct Cleaning Across San Marcos
Air duct cleaning in San Marcos costs between $350 and $650 for a typical single-family home, with larger two-story houses running $500 to $900. We schedule work across San Marcos every week, and our background-checked technicians know the housing stock here well enough to give you an honest answer before we ever touch a register. Call (737) 727-2314 for a flat-price quote on your system.
What sets us apart is simple: you get one written price for the entire system before we start, a live trackable arrival window so you aren’t waiting around all afternoon, and before-and-after photos of your own ducts when the job is done. No per-vent pricing games. No quote that changes once the van is in your driveway.
Why Cardinal Air Duct Cleaning Is San Marcos’s Preferred Air Duct Cleaning Company
San Marcos homeowners call us because our pricing model is the opposite of what this industry usually delivers. Most duct cleaning quotes leave room for surprises: a low teaser number, then extra charges for the return side, the air handler, the plenum. We quote one flat price per system, in writing, before work begins. That price covers the supply ducts, return ducts, air handler, plenum, and registers. If we find something unusual during the job, we stop and show you before any additional work proceeds.
Our crews work in San Marcos every week, from the older pier-and-beam homes near the square to newer construction off Redwood Road and along Hunter Road. The housing mix matters because duct systems age differently. A 1970s home off Holland Street with original galvanized ductwork presents different problems than a 2020 build in La Cima, and we adjust our cleaning method accordingly.
Omar Haddad, who leads our operations, has built the team around one rule: the customer should know exactly what will happen, what it will cost, and what it looked like when we finished. That is why every job includes photo documentation and why our 365-Day Done Right Promise covers every booking without exception. If the work isn’t right within a full year, we return and correct it at no charge.
Ductwork Cleaning in San Marcos
Ductwork cleaning in San Marcos homes involves cleaning the full path air travels: supply ducts that push conditioned air into rooms, return ducts that pull air back to the blower, the air handler itself, and the plenum boxes that connect them. We use rotary brush agitation from Rotobrush paired with negative-pressure extraction from Nikro HEPA vacuums. That means the loosened debris goes straight into the vacuum, not back into your living room. A typical ductwork cleaning in San Marcos runs $350 to $650 for a standard single-story home, with the price set before we begin.
Supply and Return Side Work
In San Marcos, the return side often carries more debris than the supply side because it pulls unfiltered air from the hallway and living spaces. We clean both sides fully and show photos of each. If you have a home near the river or off Aquarena Springs Drive where humidity sits higher, the return plenum can hold a surprising amount of damp dust and pollen residue.
Air Handler and Plenum
Cleaning ducts without touching the air handler is half a job. We remove the blower housing access panel, clean accessible blower fan blades, and wipe down the evaporator coil if it is reachable. In older San Marcos homes with original equipment, this step often quiets a noisy blower motor and reduces that musty smell from the registers.
Air Duct Inspection in San Marcos
An air duct inspection in San Marcos is a camera-based evaluation of your ductwork’s condition, and it costs $75 to $150 when booked as part of a cleaning, or $150 to $250 as a standalone service. We run a video scope through the main trunk lines and branch runs, looking for disconnects, crushed flex duct, moisture staining, pest intrusion, and excessive buildup. In San Marcos, where oak and cedar pollen bind to duct walls during the long spring and fall seasons, an inspection often reveals buildup homeowners cannot see from the register openings.
What the Camera Shows
We record the inspection so you can watch along or review it afterward. Common findings in San Marcos homes include separated flex duct joints in attics, where the duct has pulled away from the collar and is pulling hot attic air into the system, and return plenums caked with a sticky pollen-dust layer that regular filter changes never capture.
When to Inspect Before Cleaning
If your home is older or you suspect a pest issue, inspection first makes sense. It tells us what we are working with before we disturb anything. For a 1990s home off Bishop Street with original flex duct, we might recommend inspection ahead of cleaning so we know whether a cleaning alone will solve the problem or whether duct replacement is the honest answer.
Trusted Brands We Service in San Marcos
We clean and service all major HVAC and duct brands across San Marcos, and we maintain good working knowledge of equipment from Aprilaire, Guardsman, and Abatement Technologies for filtration and containment work. If your system uses Aprilaire media filters or Guardsman UV purification, we can inspect those components during the cleaning and recommend replacement intervals. For full system cleanings we run Rotobrush agitation tools and Nikro HEPA extraction equipment, the same professional-grade gear used in commercial and medical facility duct work, not a truck-mounted shop vac.
Common Air Duct Cleaning Problems We See in San Marcos Homes
- Pollen sludge in return ducts. San Marcos sits in a humid corridor where spring oak and fall cedar pollen seasons stretch long, and that pollen gets sticky in the moisture and binds to duct walls. We regularly see return ducts that are grittier after one season here than after three in drier Hill Country towns west of I-35.
- Poorly fitted filter bypass. A filter that doesn’t seal in its slot lets unfiltered air pull around the edges, and that air carries dust straight into the blower and coil. We find this constantly in older San Marcos homes where filter slots have warped over years of humidity swings.
- Crushed flex duct in attics. Newer subdivisions off Centerpoint Road and around Wonder World Drive have miles of flex duct in hot attics, and it does not take much to crush a run. Inspections often reveal compress lines the homeowner cannot see from the living space.
- Return plenum lint and dust buildup. Without a proper return-side filter, dust and household lint collect in the return plenum until the blower has to work harder. We have pulled clumps of lint and pollen from return plenums in San Marcos homes that made the blower sound like it was breathing through a straw.
Pricing for Air Duct Cleaning in San Marcos, TX
Here are our actual price ranges for San Marcos, written clearly before we start any work:
- Full residential air duct cleaning (single system, one furnace/air handler): $350 – $650
- Larger two-story homes with two systems: $500 – $900
- Standalone air duct inspection with video documentation: $150 – $250
- Inspection added to a full cleaning: $75 – $150
- Commercial duct cleaning (small retail or office space up to 3,000 sq ft): $800 – $1,500
What changes the price is the size of the system, number of returns and registers, accessibility of the air handler, and severity of buildup. What never changes is the price once we hand you the written quote. Call (737) 727-2314 and we will give you a flat number for your San Marcos home. No per-vent pricing. No add-on surprises at the door.
We Also Serve Cities Near San Marcos
Our Air Duct Cleaning crews cover the corridor along I-35 and into the Hill Country, including Kyle, New Braunfels, Buda, and Canyon Lake. If you are just outside San Marcos, the same flat pricing and photo documentation apply. Check our San Marcos page for neighborhood coverage details, or call (737) 727-2314 to confirm your address.
Serving San Marcos, TX - Our Local Coverage Area
We’re based in the San Marcos 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 Air Duct Cleaning in San Marcos
Every 3 to 5 years for most San Marcos homes, though homes near the river corridor or with heavy oak and cedar exposure may benefit from every 2 to 3 years. If no one in the house has allergies, you haven’t renovated, and your filter changes are consistent, you can wait longer. Call us and we will tell you honestly whether your ducts actually need cleaning.
One flat price per system, always. We never quote a per-vent number because that is how bait-and-switch pricing works in this trade. You get a written price covering the supply ducts, return ducts, air handler, and plenum before any work starts. Call (737) 727-2314 for your number.
No. We use rotary brush agitation to loosen debris from duct walls, then Nikro HEPA negative-pressure extraction to pull it out of the system entirely. We also clean the air handler, blower motor, and return plenum. Then we show you before-and-after photos of your own ducts so you can verify the work.
Yes, and it matters more here because of the pollen load. A MERV 8 filter catches basic dust but lets fine pollen through, and that pollen is what cakes onto duct walls in San Marcos’s humid seasons. We recommend MERV 11 to 13 for most homes here, provided your system can handle the pressure drop. We can check that during a cleaning.
Yes. We will add the dryer vent to the job for a small additional charge, and we will show photos of that vent too. If you are booking duct cleaning in San Marcos, ask for the dryer vent add-on when you call (737) 727-2314.
Written by Omar Haddad, Owner at Cardinal Air Duct Cleaning, serving San Marcos through the Relay Home Co. family since 2005.