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.
Why San Antonio Homeowners Choose Lennox Air Duct Cleaning
We provide independent San Antonio Lennox service for every residential Lennox system, from the Merit Series to the Signature Collection. Our team has deep-cleaned ducts connected to XC25 variable-capacity air conditioners, SLP98V modulating furnaces, and Healthy Climate filtration systems across Bexar County. What makes our Lennox work different is simple: we understand how San Antonio’s heat, humidity, and caliche dust interact with Lennox equipment, and we clean and seal ductwork accordingly. Call (430) 233-7681 for a written estimate before any work begins.
Linden Air Duct San Antonio is an independent Air Duct Cleaning services provider. We are not authorized by, affiliated with, or endorsed by Lennox International. That independence means we answer to you, not to a corporate territory agreement. Every Lennox job gets our written price before work starts, our 365-Day Done Right Promise in writing, and a technician whose name and photo you receive before they arrive.
Why Trust Linden Air Duct San Antonio for Your Lennox Air Duct Cleaning?
Lennox systems are precise machines. The variable-speed EC motors on Signature and Elite units respond to static pressure changes that older single-speed blowers simply ignore. A duct system that is dirty, leaky, or improperly sealed forces those motors to work harder to move the same volume of air. We see this constantly in San Antonio, where flexible ductwork in hot attics sags, separates, and pulls in caliche dust from soffit vents. Our technicians understand how to restore proper airflow without tripping a Lennox control board’s fault codes or damaging the blower.
Marcus Veale, owner of Linden Air Duct San Antonio, grew up in the San Fernando Valley and picked up his trade coursework at Los Angeles Trade-Technical College before spending the better part of two decades doing duct work across the Southwest. He and his crew have served San Antonio for years, from older ranch-style homes near Alamo Heights to newer builds out by the Stone Oak corridor. Marcus knows how South Texas heat cycles stress a duct system in ways installers from cooler climates never anticipate. He walks every homeowner through exactly what he found before a single tool comes out. As he puts it: “Tell me what you’re seeing, and I’ll tell you whether it’s worth fixing.”
Every technician on our Lennox jobs is background-checked, identity-verified, and photo-badged under the Threshold Standard. You get the tech’s name and photo before the visit. They show a photo ID badge at the door. That is not a courtesy. It is the minimum standard for letting someone into your home.
Styles & brands we work with
Common Lennox Air Duct Cleaning Problems We Fix in San Antonio
- Dust-choked return ducts on Signature and Elite variable-speed systems. The SLP98V, XC25, and EL296V use EC motors that modulate airflow based on static pressure. When return ducts fill with dust, pet hair, and construction debris, the motor ramps up to compensate. That extra load causes intermittent shutdowns and short cycling. We clean the full return path and verify airflow at each register, not just at the plenum.
- Condensation and mold growth in supply plenums. Humid San Antonio air hits a cold Lennox evaporator coil and condenses. If the coil sits in a humid mechanical closet or attic with poor drainage, that moisture spreads into the supply plenum and duct board. We see mold film on Lennox coils in homes across Alamo Heights and Monte Vista where the AC runs from March through November. We deep-clean the coil and treat the plenum interior with an EPA-registered biocide, then address the drainage issue that caused it.
- Lint and debris clogging secondary heat exchanger fins. Lennox high-efficiency furnaces like the SLP98V and EL296V pull air across a secondary heat exchanger. Fine dust and dryer lint that should be caught by filtration instead settle on those fins. The result is reduced efficiency, higher gas consumption, and occasional rollout switch trips. Cleaning the ducts and replacing the media filter often resolves it without touching the furnace.
- Backdrafting from shared laundry or mechanical closets. San Antonio homes, especially 1970s through 2000s builds, often put the laundry room next to the HVAC closet. A clogged dryer vent forces warm, lint-laden air back into the shared space. That backdrafted air gets pulled into the Lennox return, coating the blower wheel and heat exchanger. We clean the dryer vent as part of the full system service and check the mechanical closet pressure balance.
- Caliche dust infiltration on homes near the Balcones Escarpment. After spring thunderstorms, homeowners on the far west and northwest sides often find a fine white powder coating their registers. It is caliche dust, kicked up by construction and pulled in through soffit vents or leaky returns. If you have a Lennox XC16 or ML14XC1 running 300-plus cooling days a year, that dust builds fast. We seal the return leaks and clean the duct run end to end.
Lennox Parts & Our Repair-vs-Replace Approach
We use OEM-equivalent filters and gaskets for Lennox systems where the specification matters. A properly sized media filter keeps dust off the blower and heat exchanger. A worn gasket on the filter rack or blower door lets unfiltered air bypass the media entirely. Those parts we match to Lennox spec. For duct sealing and insulation, we use commercial-grade mastic, metal tape, and flex duct replacement that meets or exceeds Lennox’s installation requirements. The manufacturer’s warranty covers equipment. The ductwork behind the walls is our responsibility.
Repair versus replace is a judgment call we make with you, not for you. A minor duct leak gets sealed. A dirty evaporator coil gets cleaned. A fractured blower wheel or compromised heat exchanger is a different conversation. We will tell you honestly when replacement is safer than a band-aid. No scare tactics, no upsell pressure. Just the facts and a written quote.
Our Lennox Service Process – Step by Step
- 1
System diagnosis. We inspect the full duct system connected to your Lennox unit, including return drops, supply plenum, registers, and mechanical closet. We use video inspection to see what the naked eye misses, and we measure static pressure on variable-speed Lennox systems before and after.
- 2
Duct cleaning and component service. We run negative-pressure extraction on the full system. For Lennox units with accessible evaporator coils, we deep-clean the coil with an EPA-registered biocide. We pull and clean the blower wheel if it is coated. We seal supply leaks with mastic as we go.
- 3
Airflow verification. We re-measure airflow at registers and compare against pre-service readings. The goal is verifiable improvement, not just a visual before-and-after. In the Stone Oak XC25 job last summer, airflow on the upstairs returns jumped from 310 to 480 CFM after we cleaned the return drops, deep-cleaned the coil, and sealed the leaky supply connections.
- 4
Written documentation. You get before-and-after photos of your actual ducts, the airflow numbers, and the written 365-Day Done Right Promise covering the work. If anything falls short, we come back at no charge.
See the difference
Before
After
Before
After
Before
AfterLennox Products We Service & Install in San Antonio
Our technicians service every major Lennox residential line: the Signature Collection (SLP98V modulating furnace, XC25 variable-capacity AC, SLP99V), the Elite Series (EL296V, XC16, EL195E), and the Merit Series (ML180, 13ACX, ML14XC1). We also clean and maintain Lennox Healthy Climate filtration products, including PureAir, HC16 media cabinets, and HC8 filter assemblies. We also offer Lennox Air Duct Cleaning in Fair Oaks Ranch, TX, and stock common Lennox-compatible filter sizes locally for faster turnaround on routine replacements.
We Also Service These Brands
While this page focuses on Lennox, our San Antonio crew works on Trane and Carrier systems every week. Ductwork is ductwork, and the same caliche dust, lint, and humidity affect every brand. If you have a mixed system or are not sure what you have, call us. We will tell you what we are looking at.
FAQs – Lennox Air Duct Cleaning Service in San Antonio
No. Lennox’s published warranty covers manufacturing defects in the equipment itself. Proper duct cleaning, coil cleaning, and duct sealing do not void the equipment warranty. We use methods and materials that meet or exceed Lennox’s installation and service specifications, and we never open a sealed refrigerant circuit. If you have a specific warranty question, call us and we will walk through it with you. Call (430) 233-7681 for a free estimate.
San Antonio’s hard water accelerates scale on evaporator coils, especially on Lennox units that run nearly year-round. Scale on the coil reduces heat transfer and can cause condensate to carry mineral deposits into the drain pan and nearby duct surfaces. That mineral-rich moisture creates a friendlier environment for mold and mildew. Regular coil cleaning and condensate line maintenance are part of what we do on every Lennox duct cleaning visit.
Yes. We pull the blower and clean it separately wherever access allows, and we use negative-pressure extraction that does not force debris backward through the EC motor. Lennox variable-speed motors are sensitive to static pressure changes, so we re-measure before and after. Our process is designed to restore airflow without tripping fault codes or shortening motor life.
Yes, in most cases. If mold grew on the old coil, spores have likely circulated through the supply ducts and settled inside. Replacing the coil without cleaning the ducts just gives the mold a fresh surface to recolonize. We recommend cleaning the full supply and return system after any mold-related coil replacement in San Antonio, where humidity keeps ducts damp longer.
If air exits the registers strongly but dust keeps settling, you likely have return-side leakage. The Lennox blower is pulling unconditioned air from the attic, crawlspace, or wall cavities through cracks in the return. In San Antonio, that often means caliche dust and insulation fibers circulating through your home. We seal the returns with mastic and metal tape, then clean the full system. That addresses the source, not just the symptom.
For a standard single-family Lennox system in San Antonio, expect to pay between $400 and $850 for full duct cleaning depending on home size, number of returns, and whether coil cleaning or duct sealing is included. We quote one flat price per system before any work starts, always in writing. No per-vent pricing, no surprise charges at the end. Call (430) 233-7681 for an exact quote based on your Lennox system and home layout.
Book Your Lennox Service in San Antonio, TX
We clean, seal, and service Lennox ductwork in San Antonio and Lennox Air Duct Cleaning in Selma, TX every week. Call (430) 233-7681 for a written estimate before work begins. You will get a real person on the phone, a technician with a name and photo you receive before arrival, and a written guarantee on the work.
Written by Marcus Veale, Owner at Linden Air Duct San Antonio, serving San Antonio since 2004.