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 San Francisco, CA | Linden Air Duct San Francisco
We provide independent our Lennox services across San Francisco, and we’ve been doing it long enough to know one thing separates this city from anywhere else: the fog. A Lennox system here doesn’t fail the way it does in Sacramento or San Jose. The daily marine layer leaves a salt-and-dust film inside ductwork that promotes corrosion and feeds mold in ways most duct cleaners never see. If you own a Lennox forced-air system in San Francisco and you’ve noticed weak airflow, musty return air, or rooms that never quite cool, call us at (951) 527-6259 for a free estimate. We’ll tell you exactly what’s in your ducts and what it costs to fix before anyone touches a vent cover.
Why San Francisco Residents Choose Us for Lennox Service
Lennox builds equipment we respect. The Elite and Merit series forced-air systems are common across San Francisco, but the ductwork feeding them is rarely factory-standard. Half the city’s homes were built before 1960, and when central air got retrofitted into Victorian and Edwardian floor plans, the duct runs ended up narrow, long, and full of bends. That’s what we work with every day.
Marcus Veale, our owner, picked up his trade fundamentals at Los Angeles Trade-Technical College and spent close to two decades working residential and commercial HVAC systems across California before building Linden around a simple idea: the customer deserves to know exactly what’s in their ducts, what it takes to clean them, and what it costs, all before work begins. We’re an independent Lennox service provider, not a manufacturer affiliate, and that independence means we never push replacement when cleaning, sealing, or a minor repair will do the job.
Every technician who arrives at a San Francisco home is background-checked, identity-verified, and photo-badged under the Threshold Standard. You’ll receive the tech’s name and photo before the visit, and they’ll show a photo ID at the door. No surprises, no ambiguity.
Styles & brands we work with
Common Lennox Air Duct Cleaning Problems We Solve in San Francisco
- Salt-and-dust film inside ducts from the daily fog. Homes within five blocks of Ocean Beach or the Great Highway often show a fine, gray film coating the inside of galvanized steel ducts. In a Lennox system, that film accelerates corrosion and sticks to evaporator coils, cutting airflow and efficiency. We use negative-pressure extraction to pull it out without spreading it through the house.
- Clogged supply vents from decades of plaster dust and knob-and-tube insulation fibers. Pre-1960 retrofit ductwork in San Francisco is notorious for this. Older Lennox systems often have supply vents that barely move air because decades of renovation debris and old wiring insulation have packed the first few feet of each run. We clear them thoroughly and verify airflow at the register.
- Mold and mildew in return ducts from cool, damp ocean air. San Francisco’s fog-damp air never fully dries out inside a return duct. Lennox return runs that pull from basements or crawl spaces are especially prone to musty growth. We treat affected surfaces with antimicrobial products and address the airflow issues that keep them damp afterward.
- Flex duct collapse or kinking in tight retrofits. Victorian and Edwardian floor plans in San Francisco don’t leave much room for duct runs. Flex ducts get crushed or kinked behind walls and under floors, starving rooms far from the Lennox air handler. Our video inspection finds the exact restriction, and we repair or reroute the affected section.
- Pinhole leaks at duct joints. Older galvanized ductwork in San Francisco homes frequently leaks at the seams, especially after decades of thermal cycling and salt-air exposure. We seal joints with mastic, which holds up far better than tape in this climate and gives the Lennox blower a sealed path to every register.
Lennox Service in San Francisco: What Local Conditions Mean for Your Equipment
Here’s something worth knowing if you live here: San Francisco is the only major US city where the daily marine fog layer leaves a measurable salt residue inside ductwork. We’re not talking about a light dusting. Homes within five blocks of Ocean Beach or the Great Highway can show visible corrosion on duct surfaces after just a few years of operation. That salt film isn’t found with the same consistency in Oakland, Daly City, or any neighboring city. What it means for your Lennox system is straightforward: the evaporator coil picks up salt particles from recirculating air, the coil loses heat transfer capacity, and the blower works harder to push through ducts that are slowly corroding from the inside. In the Richmond and Sunset districts, where fog pours in daily, we routinely find ducts with a gray, salty residue that locals joke about. Our crew sees it constantly. Regular cleaning slows the corrosion cycle and keeps a Lennox system moving air the way it should. If I wouldn’t put it in writing before the job starts, it shouldn’t come out of my mouth either; that’s the standard we work to on every San Francisco job.
Lennox Models & Products We Service in San Francisco
We work on the full Lennox residential lineup: the Elite Series, Merit Series, Signature Collection, and Dave Lennox Signature Collection. When airflow-critical components like coil fins or blower wheels need replacement, we use OEM Lennox parts. For general duct repairs, we choose high-quality aftermarket materials that meet or exceed local code. Our vans are stocked with the common parts and sealing materials we need in San Francisco, which means we’re usually able to complete cleaning, sealing, and coil treatment in a single visit rather than scheduling follow-ups. We also use video inspection on every job, so you can see exactly what your ducts looked like before and after, and we never upsell a new system when cleaning or a minor repair solves the problem.
See the difference
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Before
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Before
AfterLennox Service Pricing in San Francisco
Air Duct Cleaning - San Francisco for a typical home runs between $500 and $1,800 depending on the size of the system, the number of returns, and how much buildup is present. A small condo with a single return and short runs lands on the lower end. A three-story Edwardian with long retrofit ducts, multiple returns, and decades of debris will be higher. Duct sealing typically adds $400 to $1,200 depending on access. Evaporator coil treatment runs $150 to $350. Every quote is a written, flat price per system, agreed before any work begins. No per-vent pricing, no bait-and-switch. Call (951) 527-6259 and we’ll walk you through what your Lennox system likely needs based on your neighborhood, your home’s age, and what we’ve seen across San Francisco.
Serving San Francisco, CA - Our Local Coverage Area
We’re based in the San Francisco 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 Francisco
Every 3 to 5 years for most San Francisco homes, and closer to every 2 to 3 years if you’re within five blocks of Ocean Beach or the Great Highway, where the salt film inside ducts builds faster. Homes in the Richmond and Sunset districts also fall on the shorter interval because the fog is so consistent there. You’ll know it’s time when registers show gray dust, airflow drops, or a musty smell comes from the returns. Call (951) 527-6259 and we’ll check your system with a video inspection before recommending anything.
Yes. San Francisco’s cool, foggy summers mean windows stay closed more often than not, so your Lennox system recirculates the same air all day. When ducts carry a salt, dust, or mold film, airflow drops and the evaporator coil transfers less heat, so the system runs longer to reach the thermostat setting. Clean ducts and a clean coil restore airflow and cut runtime. It’s one of the most predictable improvements we see, especially in older buildings with retrofit ductwork. For a free estimate and an honest look at your utility usage, call (951) 527-6259.
It depends on what the white tape is. In many 1920s San Francisco buildings, that tape is asbestos-containing material, and it should not be disturbed. We identify it before any cleaning begins and follow the proper containment and removal protocols if it’s present. In other cases, the tape is simply old cloth or paper and safe to handle. Either way, the first step is always the same: we inspect, we identify what we’re dealing with, and we tell you plainly what’s safe to clean and how. Call (951) 527-6259 for an inspection if you’re not sure what’s on your ducts.
We use an in-place coil treatment process. The Lennox evaporator coil stays mounted in the air handler, and we apply a foaming cleaner specifically formulated to lift the salt-and-dust film common in San Francisco homes. The foam expands into the coil fins, breaks down the buildup, and rinses through the condensate drain. In cases where the coil is too far gone or drainage is blocked, we’ll discuss removal options plainly, but for most homes in the city, in-place treatment works well. Call (951) 527-6259 and we’ll walk you through the process for your specific Lennox system.
First, don’t block the return vent. That raises system pressure and can pull more damp air through wall cavities instead. Then call us. A musty smell from the return usually means mold or mildew has established itself inside the duct run, and the fix requires cleaning the return path, treating the affected surfaces, and often sealing small leaks that let fog-damp outside air in. It’s a common issue in San Francisco basements and crawl spaces, and it rarely resolves on its own. Call (951) 527-6259 for a free estimate; we’ll inspect the return, identify the source of the smell, and give you a written price before any work starts.
Service Areas Near San Francisco
Our crews handle Lennox air duct cleaning across San Francisco and the surrounding Bay Area. We regularly serve Oakland, Hayward, Berkeley, and Redwood City. That includes Lennox service in Oakland and Lennox service in Hayward, where we see many of the same retrofit duct issues, though rarely with the same salt exposure as San Francisco’s coastal neighborhoods. If you’re in the broader San Francisco service area, we’re close by and familiar with the housing stock.
Book Your Lennox Service in San Francisco Today
If your Lennox system has been running weak, smelling musty, or you simply haven’t had your ducts cleaned since you moved in, now’s a good time to find out what’s actually in there. Call (951) 527-6259 for a free estimate and a straight answer. We’ll send the technician’s name and photo before the visit, and the price before any work begins. That’s how we do it in San Francisco, every time.
Written by Marcus Veale, Owner at Linden Air Duct San Francisco, serving San Francisco since 2004.