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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AfterLennox Air Duct Cleaning in San Antonio, CA | Cardinal Air Duct Cleaning
Independent Lennox Air Duct Cleaning in San Antonio runs $450 – $850 for a typical single-system home, depending on how many returns and supply runs your layout has. We’re not a Lennox dealer, and that’s the point: we clean and repair what’s actually failing on your Merit, Elite, or Signature system without any dealer-network constraints. Omar Haddad and our team work on Lennox air handlers across San Antonio every week, and the single biggest issue we see here is attic heat cooking flex duct and mastic seals until the system starts pulling 140°F air into your supply runs. Call (737) 727-2314 for a written quote before any work starts.
Why San Antonio Residents Choose Us for Lennox Service
Lennox builds tight, well-engineered air handlers, but they only perform as well as the ductwork attached to them. Omar Haddad learned HVAC fundamentals at Los Angeles Trade-Technical College and has spent over a decade cleaning residential systems with Rotobrush and Nikro equipment, not truck-mounted shop vacs. That matters here because San Antonio’s long cooling season loads Lennox evaporator coils with dust and biofilm faster than almost anywhere else in the state. We know the cabinet layouts on Merit, Elite, and Signature units; we know where the blower access panels sit; and we know how a collapsed flex run in a 140°F attic starves a variable-speed air handler of return air. Every technician arrives background-checked and in uniform, with a written price handed to you before a single duct is touched. The 365-Day Done Right Promise backs the whole job: if it’s not right within a year, we come back and make it right at no charge.
Our Lennox sales & service depth comes from years of working on these specific units, not from a manufacturer training video. We’re independent, which means we diagnose freely and recommend what the system needs, not what a dealer incentive program rewards.
Common Lennox Air Duct Cleaning Problems We Solve in San Antonio
- Dust-loaded evaporator coils on Elite and Signature variable-speed units. San Antonio’s cooling season runs from March into November. That’s nine months of continuous airflow pulling household dust, pet dander, and skin cells across the coil. We regularly pull coils that look like felt. Restricted airflow drops efficiency and eventually freezes the coil, which is when most homeowners notice the problem.
- Blower motor dust buildup on older Merit and Elite air handlers. The blower wheel is the lungs of the system. When the wheel’s blades cake with dust, the motor works harder and runs hotter. We see this constantly on 10-to-15-year-old 14ACX and EL16XC1 paired air handlers in San Antonio. A blower cleaning restores airflow and drops energy use measurably.
- Crushed or collapsed flex duct in San Antonio attics. Attic temps above 140°F soften the plastic liner inside flex duct. Once the inner liner sags or the duct gets bent during a service call, airflow to back bedrooms drops hard. Rooms farthest from the air handler get warm while the thermostat sits satisfied. We find and repair these runs on nearly every attic inspection.
- Degraded mastic seals pulling attic air into the supply plenum. Thermal cycling here, hot days followed by cooler nights, works mastic joints loose over a few summers. The gaps are small, but 140°F attic air entering the supply side raises supply-air temperature and drives humidity into the ducts. We reseal, retape, and re-mastic those connections during duct cleaning and sealing work.
- Dirty return-air paths limiting variable-speed performance. Signature Series units like the XC25 and XP25 modulate airflow based on measured static pressure. A dust-choked filter grille or return duct tricks the controls into running the blower harder for less delivered air. Cleaning the return side and correcting return-duct sizing where needed is often the single highest-impact fix for comfort complaints in San Antonio.
Lennox Service in San Antonio: What Local Conditions Mean for Your Equipment
Here’s the thing most generic advice misses: San Antonio attics regularly exceed 140°F in July and August. That specific number, not just “Texas heat,” is what separates San Antonio from Houston or Dallas for Lennox owners. Houston runs hot and humid but attic peaks stay lower because of cloud cover and Gulf moisture. San Antonio’s drier, sunnier climate bakes attics harder. The outer jacket on flex duct degrades, the mylar liner gets brittle, mastic seals crack, and now your 18-SEER Lennox is delivering 14-SEER performance because conditioned air leaks into an oven. Around areas like Alamo Heights and the older neighborhoods off Broadway, we routinely see attic duct systems that have survived multiple summers but are starting to fail at the plenum connections. That’s why we push duct sealing and coil cleaning as a package on Lennox systems here. Clean the coil, clean the blower, seal the supply runs, and the system does what the nameplate says.
For anyone outside this area, we also offer San Antonio service area coverage for nearby communities, and we’re glad to route a technician your way.
Lennox Models & Products We Service in San Antonio
We clean and service the full residential Lennox line in San Antonio: Merit Series (14ACX, 14HPX), Elite Series (EL16XC1, EL18XPV), Signature Series (SL280V, SLP98V), and the Dave Lennox Signature Collection (XC25, XP25). When a repair calls for a part, we use OEM Lennox components when they’re the right fit, and we also stock high-quality aftermarket blower motors and coils that meet or exceed OEM specifications. That means we’re not waiting on a distributor run when your blower motor fails in August. If a system is past 15 years old or has multiple failing components, we’ll give you a straight repair-vs-replace comparison without any pressure toward a new unit.
Lennox Service Pricing in San Antonio
| Service | Price Range |
|---|---|
| Air duct cleaning, single system | $450 – $850 |
| Evaporator coil cleaning (in place) | $200 – $400 |
| Blower cleaning (removal and hand-clean) | $150 – $300 |
| Duct sealing (supply plenum and first 20 ft of runs) | $300 – $600 |
Pricing depends on system size, number of returns, attic access, and how badly the duct runs have degraded. Every estimate is free and every quote is written before work begins. You’ll know the number on the paper and that’s the number you pay. Call (737) 727-2314 and we’ll schedule a walkthrough at your San Antonio home.
Serving San Antonio, FL - Our Local Coverage Area
We’re based in our San Antonio service 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 – Lennox Air Duct Cleaning in San Antonio
Because your cooling system runs nine-plus months a year here, pulling constant airflow across the evaporator coil. San Antonio’s dry, dusty conditions mean fine particulate settles on the wet coil surface and bakes into a film. A coil that would look normal after three years in a mild climate looks like carpet after two summers here. The fix is scheduled coil cleaning, usually every two to three years, paired with good filtration. Call (737) 727-2314 and we’ll inspect yours.
Yes, we remove the blower assembly, hand-clean the wheel and housing, and reinstall it. Merit Series units like the 14ACX and 14HPX paired air handlers have accessible blower compartments, and a clean wheel restores airflow and drops motor amp draw. We do this in San Antonio as part of most full duct cleaning and San Antonio Dryer Vent Cleaning jobs. Call (737) 727-2314 for a quote.
In most San Antonio homes, yes. Supply-side leaks into a 140°F attic pull hot air into the airstream and force the system to run longer to hit the setpoint. Sealing the plenum connections and the first sections of flex duct keeps conditioned air in the ducts. We’ve measured supply-air temperature drops of 8 – 12°F after sealing on Lennox systems in this area. Call (737) 727-2314 and ask about duct sealing with your next cleaning.
We use OEM Lennox parts whenever they’re the right choice, but we’re not locked into a dealer parts program. For blower motors, capacitors, and coils we also carry aftermarket components that meet or exceed OEM specs, which often means same-week repairs without distributor delays. We’ll show you the part, explain the difference, and let you decide. Call (737) 727-2314 with your model number and we’ll tell you what’s stocked.
Every three to five years for most San Antonio homes, but closer to every two to three if you have pets, live near new construction generating dust, or anyone in the house has allergies. Lennox systems with variable-speed blowers that run continuously pull more air through the ducts each day, which means more dust settles in the runs. Call (737) 727-2314 for an honest assessment of your system’s condition.
Service Areas Near San Antonio
We serve homes across the greater San Antonio metro. If you’re nearby and need Lennox duct cleaning or coil work, reach out. We route technicians from our central scheduling desk and can often fit in same-week appointments for homes in the surrounding areas. For folks farther west, we’ve also handled Lennox service in San Diego, and for those up north, Lennox service in Dallas is part of our wider coverage map.
Book Your Lennox Service in San Antonio Today
Call (737) 727-2314 and a live person answers, day or night. We’ll set a trackable arrival window, send a background-checked tech in uniform, and hand you a written price before any work starts. You’ll get before-and-after photos of your own ducts, a digital invoice payable by link, and a full year of coverage under the 365-Day Done Right Promise.
Written by Omar Haddad, Owner at Cardinal Air Duct Cleaning, serving San Antonio since 2005.