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 | Hollis Air Duct Cleaning
We clean and restore Lennox duct systems throughout our San Antonio service area, and the job here is different from anywhere else. Caliche dust and live oak pollen settle inside Lennox cabinets and flex ducts in ways that generic cleaning crews miss. Roy Castellanos and our techs have worked on Lennox equipment since the early 2000s, so we know exactly where debris hides in Merit, Elite, and Signature Collection systems. Call (361) 326-5060 for a written quote before any work starts.
Why San Antonio Residents Choose Us for Lennox Service
We know Lennox airflow from the inside. A Merit Series air handler moves air differently than an Elite, and a Signature Collection variable-speed blower reacts to dirty ducts differently than a single-stage unit does. That matters when you’re deciding whether a cleaning will actually fix your problem or just delay a repair.
Roy Castellanos grew up in Boyle Heights and learned the mechanical trades through the sheet metal and air conditioning program at Los Angeles Trade-Technical College. He spent years doing hands-on duct work before founding Hollis Air Duct Cleaning in 2004. Today, every job we run follows The Garrison Code: arrive inside the quoted window, price in writing before we touch anything, complete the work by the book, and leave the site clean.
We’re an independent company. We are not affiliated with or authorized by Lennox, and we don’t pretend to be. What we offer is straightforward: techs who understand Lennox equipment, Lennox sales & service knowledge applied to cleaning and sealing, and a 365-Day Done Right Promise that covers the work in writing for a full year.
Common Lennox Air Duct Cleaning Problems We Solve in San Antonio
- Sagging flex duct pulls away from Lennox plenums. Pre-1990s ranch homes across San Antonio were built with flex duct that sags over time. When that happens at the plenum connection, the gap pulls caliche dust and oak pollen straight into the evaporator coil. We reseal the connection and repair or replace the flex run.
- Merit Series air handlers with packed return plenums. The narrow return plenum on a Lennox Merit Series unit traps debris that gets pulled in from the return side. In neighborhoods like Alamo Heights and Monte Vista, we regularly find rodent nesting material packed in there, throwing the blower wheel out of balance and cutting airflow. Removing it is step one.
- Mold-prone condensate pans and drain lines. San Antonio summers push average highs into the 90s, and the humidity keeps cooling cycles long. That constant runtime makes Lennox condensate pans stay wet, and once mold starts there, spores circulate through the ducts every time the blower kicks on.
- Variable-speed blower codes on Signature Collection units. A Lennox XC21 or XC25 with a variable-speed blower is sensitive to return-side static pressure. When flex duct in a San Antonio attic is kinked or crushed, the motor ramps incorrectly and the control board throws fault codes. Cleaning the ducts won’t fix a crushed return; repairing the duct will.
- Legacy Complete Heat System buildup. Those 1980s and 1990s Lennox Complete Heat units still run in plenty of San Antonio single-story homes. The combination of aged flex duct and decades of alkaline dust creates a packed coating on the blower wheel and heat exchanger that reduces efficiency year after year.
If any of these sounds familiar, call (361) 326-5060. We’ll tell you what’s actually going on before we quote a price.
Lennox Service in San Antonio: What Local Conditions Mean for Your Equipment
San Antonio’s caliche dust is alkaline and slightly adhesive when it mixes with condensate. That’s not a footnoted detail; it’s the reason Lennox evaporator coils in this city develop a cemented dust mat that ordinary vacuuming won’t remove. The dust here is not the same as the dry, loose dust in Dallas or the coastal air in San Diego. It bonds to coil fins and flex duct walls, and once it hardens, a standard brush-and-vacuum job leaves most of it behind. We use a coil-safe foaming treatment before rinsing, a step we have to take in San Antonio that matters far less in cities with less alkaline soil. When a homeowner in Monte Vista called us about their Lennox Elite Series system short-cycling with a whistling return vent, we found the original 1970s flex duct collapsed and filled with caliche dust and rodent nesting, which is why Air Duct Cleaning in San Antonio requires specialized expertise. After removing the debris, we repaired the flex run with R8 duct, cleaned the evaporator coil, and sealed the plenum with mastic. The static pressure normalized and the whistling stopped. That’s the difference between generic duct cleaning and knowing what San Antonio soil does to a Lennox system.
Lennox Models & Products We Service in San Antonio
Our crews work on the Lennox Merit Series (14ACX, ML14XC1), the Elite Series (EL16XC1, EL18XCV), and the Dave Lennox Signature Collection (XC21, XC25). We also service legacy Complete Heat Systems still running in San Antonio’s older ranch homes. When we seal at the cabinet and plenum, we use Lennox OEM gaskets, foil tape, and mastic. For flex duct replacement, we specify quality aftermarket R8 insulated duct because the OEM equivalent is often unavailable locally, and R8 is the right product for a San Antonio attic anyway. If a Lennox coil or heat exchanger is corroded or cracked from years of dust and humidity, we’ll tell you honestly when cleaning and sealing won’t restore performance.
Lennox Service Pricing in San Antonio
We don’t quote per-vent prices and we don’t run teaser coupons that grow once the van pulls up. The whole-system cleaning price is written down before any work starts, and it does not move at the door. For a typical San Antonio single-story home with a Lennox system, full duct cleaning and coil cleaning generally runs between $450 and $900 depending on the number of returns, the length of flex runs, and how much debris has accumulated. Flex duct repair or replacement is quoted separately after we inspect the attic. Free estimates include a visual inspection of the plenum, coil, and accessible duct runs. Call (361) 326-5060 for an exact number on your system.
Serving San Antonio, FL - Our Local Coverage Area
We’re based in the San Antonio 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 system runs almost year-round here. San Antonio’s hot, humid summers and mild winters mean your Lennox blower is moving air through the ducts in every season, and every cycle pulls in more caliche dust, live oak pollen, and mold spores. In a cooler climate, the system cycles less and accumulates less. Most San Antonio Lennox owners get measurable buildup within 18 to 24 months. Call (361) 326-5060 and we’ll tell you what your ducts are holding.
Yes, in most cases. We access the coil through the cabinet panel and use a coil-safe foaming cleaner that breaks down the caliche dust mat, then rinse and vacuum the residue. If the coil is too far gone or the cabinet won’t allow safe access, we’ll tell you before we start. We’d rather lose a cleaning job than damage a coil that costs thousands to replace.
It’s common enough that we check for it on every older home we service. Warm attics and older flex duct that has small gaps or holes invite rodents, and Alamo Heights and Monte Vista have the housing stock and tree cover that make it worse. Nesting material in the ducts is both an airflow problem and a health concern. We remove it, repair the duct, and seal the entry point where we can, which is part of our San Antonio Dryer Vent Cleaning and duct restoration process.
For sealing, yes. We use Lennox OEM gaskets, foil tape, and mastic at the cabinet and plenum connections. For flex duct replacement, we specify quality aftermarket R8 insulated duct because the OEM equivalent is often not available locally and R8 is the right spec for San Antonio attics. We’ll always tell you which is which on the written quote.
The dust is alkaline and slightly adhesive, so it builds up on blower wheels and inside the housing instead of blowing through. On a Lennox Signature Collection variable-speed blower, that added resistance changes static pressure readings, and the control board ramps the motor incorrectly or throws a fault code. Cleaning the blower wheel and correcting any crushed or sagging flex duct usually restores normal operation. Call (361) 326-5060 for an inspection if your XC21 or XC25 is throwing codes.
Service Areas Near San Antonio
Our crews serve San Antonio and the surrounding communities, including Los Angeles, Brooklyn, Houston, Queens, Manhattan, and Philadelphia. If you’re nearby and running a Lennox system that’s overdue for a proper cleaning, we’ll bring the same written pricing and 365-Day Done Right Promise. You can also see our San Antonio service area page for full coverage. We also run Lennox service in San Diego and Lennox service in Dallas for those markets.
Book Your Lennox Service in San Antonio Today
Clean ducts, straight answers – that’s the whole job. If your Lennox system is moving less air than it should, or your vents are dusting the furniture a week after you clean, call (361) 326-5060. We’ll inspect, quote in writing, and do the job the way it should be done.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving San Antonio since 2004.