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.
Lennox Air Duct Cleaning in Daly City, CA
Lennox air duct cleaning in Daly City runs $450 to $950 for a full-system cleaning on most single-family homes, with repairs billed separately based on what we find. We’re an independent Lennox service provider serving all four Daly City ZIP codes: 94014, 94015, 94016, and 94017. The thing that separates our Lennox work here from anywhere else is simple: Daly City’s fog-belt moisture gets inside duct runs in ways inland crews never see, and we’ve spent years learning exactly how Lennox components respond to it.
Hallmark Air Duct Cleaning handles Lennox sales & service with an equipment-serious approach. We clean, repair, and improve these systems without treating your home like an upsell opportunity. Call (833) 467-6681 for a free estimate from a crew that knows Lennox duct work in Daly City specifically.
Why Daly City Residents Choose Us for Lennox Service
Most duct cleaning companies will clean any brand the same way. A Lennox system in Daly City doesn’t work like a generic system, especially when it’s been living in a fog-belt attic for fifteen years. We know where Lennox flex runs fail, how the galavanized trunks corrode in this specific climate, and what the Healthy Climate media cabinets do when they’re pulling in wet marine air. That’s not brand trivia. It’s the difference between cleaning what you can reach and actually fixing what’s wrong.
Nelson Briggs, our owner, got his start through the building trades program at Laney College, where a hands-on instructor showed him that most indoor air problems start where nobody thinks to look: inside the ducts. He’s spent the better part of two decades doing air duct cleaning work across the Bay Area, including Lennox repair in South San Francisco. When his youngest daughter developed asthma, general HVAC work stopped being enough. He focused on duct cleaning because it stopped being abstract once it was personal. That’s the standard we bring to every Lennox job in Daly City.
We use OEM Lennox-compatible filter media, gaskets, and flex duct where fit and longevity matter, and quality aftermarket mastic, insulation, and metal repair components where they perform equal to or better. When we tell you a trunk needs repair versus replacement, we’re giving you an honest recommendation, not a default tear-out quote.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
Common Lennox Air Duct Cleaning Problems We Solve in Daly City
- Condensation-soaked flex duct in unconditioned attics. Daly City’s marine fog keeps attic humidity high year-round, unlike inland cities that get a dry season. Lennox flex runs absorb that moisture, and once the inner liner saturates, mildew colonizes the surface. We pull and replace compromised flex rather than trying to “clean” a liner that’s already failed.
- Rust-through on older galvanized trunks and boots. Cold, damp air settles on metal duct components in Daly City crawlspaces and attics. The seams and plenum connections on older Lennox installs are the first places rust eats through. We repair what’s salvageable and tell you plainly when a section needs replacement.
- Mildew inside Lennox Healthy Climate media cabinets. These filter housings pull moist attic air when they’re not sealed properly. The filter face and cabinet interior grow mildew, which then distributes through the supply side. We clean and reseal the housing so it stops drawing wet air in the first place.
- Loose return plenum and boot connections on hillside homes. Daly City’s stucco-over-wood-frame houses settle over time, especially on the hillside lots in Westlake and Serramonte. That settlement pulls boot connections loose, opening air leaks that draw fog-damp crawlspace air into your Lennox air handler. We reseal with mastic and restore proper airflow.
- Weak airflow to back bedrooms in split-level and hillside floorplans. Long flex runs to rear rooms suffer most from condensation damage and compression. When airflow drops, we inspect the full run rather than just blowing air through it. Often the fix is repairing collapsed or kinked flex, not just cleaning it.
Lennox Service in Daly City: What Local Conditions Mean for Your Equipment
Here’s the thing about Daly City that most duct cleaning companies miss: attics in the Westlake and Serramonte hillside tracts stay humid even in midsummer because onshore fog rolls in most afternoons. A Lennox flex duct in a Daly City attic never gets a dry season to off-gas moisture the way it would in Chinatown or Walnut Creek. That means the interior liner stays damp for months at a stretch, and mildew doesn’t need a leak to start growing. It just needs persistent humidity and a bit of organic dust. When we clean Lennox systems in Daly City, we’re not just removing dust. We’re diagnosing whether the moisture cycle has already compromised the duct material itself. That’s the local knowledge that changes how we approach the work.
On a Westlake hillside home with an older Lennox Elite furnace, our crew pulled a video inspection and found the attic flex runs to the rear bedrooms soaked with condensation and coated in mildew where the inner liner had failed. We replaced the compromised flex, reinsulated the remaining runs, sealed the plenum boots with mastic, and cleaned the Lennox air handler and evaporator coil. The homeowner’s musty smell disappeared, and airflow to the back rooms recovered. That’s a Daly City failure mode you won’t read about on a generic Lennox page.
Lennox Models & Products We Service in Daly City
We service the full Lennox residential range: Merit Series (ML/MB) gas furnaces and air handlers, Elite Series (EL) furnaces and variable-speed air handlers, and Dave Lennox Signature Collection (SL) variable-capacity systems. We also work on Lennox Healthy Climate whole-home air filtration and duct-mounted media cabinets, which have their own failure profile in Daly City’s damp air. For parts, we use OEM Lennox-compatible filter media, gaskets, and flex duct where fit and longevity matter, and quality aftermarket mastic, insulation, and metal repair components where they perform equal to or better than OEM. When a Lennox trunk or plenum is rusted through, we tell you plainly whether repair or replacement makes sense rather than defaulting to a full tear-out. Our Daly City service area coverage includes stocked common components for faster turnaround on the jobs we see most.
See the difference
Before
After
Before
After
Before
AfterLennox Service Pricing in Daly City
Full Lennox air duct cleaning in Daly City typically runs $450 to $950 for a single-family home, depending on system size, number of returns, and how much contamination has built up. Flex duct replacement, plenum repair, and filter cabinet resealing are quoted separately after we inspect. Here’s what shapes the price:
- Number of supply and return runs (a three-bedroom Westlake home is different from a two-bedroom Serramonte duplex)
- Whether the system has original flex from install or has been updated
- Condition of the Healthy Climate media cabinet and filter housing
- Whether repairs are needed before cleaning makes sense (no point cleaning a rusted-out trunk)
- Access: crawlspace systems take longer than attic runs when the fog has made under-floor spaces miserable to work in
Every estimate includes a video inspection so you see what we see before you pay anything. Call (833) 467-6681 and we’ll walk the system with you. No pressure, just an honest read on what your Lennox duct work actually needs in Daly City’s climate.
Serving Daly City, CA – Our Local Coverage Area
We’re based in the Daly City area and know this community well, and we also handle Lennox in SoMa. Use the map below to see our service coverage – if you’re nearby, we can almost certainly help.
FAQs – Lennox Air Duct Cleaning in Daly City
Because Daly City’s fog keeps attic humidity high even on dry days, so condensation lingers inside flex duct liners and on metal components without any rain being involved. The fix starts with identifying whether the liner is saturated and mildewed or just damp, then either replacing the compromised flex or cleaning and resealing what’s salvageable. Call (833) 467-6681 for a video inspection that shows exactly what’s happening inside your runs.
Yes, especially on older galvanized trunks and plenum boots near the coast. The marine air in Daly City carries moisture and trace salt that accelerates corrosion at seams and connections. We repair salvageable sections and replace what’s structurally compromised, rather than always pushing a full tear-out.
It does. These cabinets pull moist attic air when the housing isn’t sealed tight, which leads to mildew on the filter face and inside the cabinet. We clean the housing, replace the media with OEM-compatible filters, and seal the cabinet so it stops drawing wet air. That’s standard on our Daly City Lennox jobs, and it’s one of the things generalist cleaners overlook.
In Daly City’s fog belt, we recommend an inspection at least every two to three years, with cleaning on a schedule based on what the inspection shows. Homes in the hillside tracts like Westlake and Serramonte tend to need more frequent attention because the attic humidity never really drops, similar to what we see with Lennox repair in Alameda. Call (833) 467-6681 for an honest recommendation for your specific system.
Often, yes. Long flex runs to rear bedrooms are the most likely to suffer from condensation damage, compression, or loose boot connections in Daly City’s hillside homes. We trace the full run, find the restriction or leak, and fix it rather than just cleaning the central trunk and calling it done.
Service Areas Near Daly City
Hallmark Air Duct Cleaning serves Daly City and surrounding Bay Area communities. If you’re in Oakland, Berkeley, Hayward, Alameda, Piedmont, or Richmond with a Lennox system, we can help. We also provide dedicated Lennox service in San Leandro and Lennox service in Castro Valley, covering the East Bay with the same equipment-serious approach.
Book Your Lennox Service in Daly City Today
If your Lennox duct work has been living in Daly City’s fog for years without attention, it’s time for an honest assessment. Call (833) 467-6681 for a free estimate. We’ll put a video camera in your ducts and show you exactly what’s there before you spend a dollar.
Written by Nelson Briggs, Owner at Hallmark Air Duct Cleaning, serving Daly City and the greater Bay Area. Clean ducts don’t announce themselves – you just breathe easier and wonder why you waited.