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 Francisco, CA | Linden Air Duct Cleaning
Air Duct Cleaning - San Francisco for a Lennox system runs $600 to $1,100 for a full system on a typical Victorian flat. We’re Linden Air Duct Cleaning, an independent Lennox service provider, and the thing that sets our work apart here is simple: we know how marine fog interacts with Lennox air handlers in ways most cleaners never see. Call (980) 447-2498 for a written quote before any work starts.
Why San Francisco Residents Choose Us for Lennox Service
We’ve been cleaning ducts since 2004, and Marcus Veale, our owner, cut his teeth on the HVAC program at Los Angeles Trade-Technical College, where he learned the mechanical side of duct systems, airflow diagnostics, and equipment handling. That training matters when you’re working on Lennox equipment in San Francisco, because the housing stock here is unlike almost anywhere else in the country.
Most San Francisco homes are Victorian and Edwardian flats built between the 1880s and 1910s in neighborhoods like the Haight, Castro, Noe Valley, and Mission. These buildings were originally heated by floor furnaces or radiant systems. Forced air came later, retrofitted through original wood-framed walls and subfloor cavities. The duct runs are cramped, irregular, and rarely inspected. When those ducts connect to Lennox equipment, the marriage is often imperfect. We know what to look for because we’ve seen it hundreds of times.
We’re not a manufacturer-authorized dealer. We’re independent, which means we answer to you, not a brand quota. Our technicians understand Lennox cabinet clearances, blower rails, and drain-pan geometry better than most general duct cleaners, and we bring that knowledge to every fog-belt flat we service. See our full Lennox sales & service coverage for details on what we handle.
Common Lennox Air Duct Cleaning Problems We Solve in San Francisco
- Mold at the plenum connection. Flex-duct sections joined to Lennox plenums in balloon-frame wall and subfloor chases frequently fail at the collar. Gaps around the takeoff let marine-layer moisture into the duct interior. Even lightly used Lennox systems in the Outer Sunset show mold growth at the plenum connection, something we simply don’t see in drier inland cities.
- High-static ECM blower strain. Lennox Merit and Elite air handlers use high-static ECM blower assemblies that pull hard against undersized or crushed retrofit returns common in Victorian flats. In San Francisco, where ducts were threaded through walls never designed for forced air, these blowers fail prematurely. We clean the blower wheel and check static pressure before recommending any motor replacement.
- Slime-coated evaporator coils. Lennox cased coils and drain pans hold standing condensate in the fog belt. In Outer Sunset homes running Lennox systems below 68°F, the coil pan stays wet for weeks and grows biological slime that fouls the coil face and migrates into the supply trunk. This is the most common source of that musty smell in west-side flats.
- All-aluminum coil fin pack fouling. Lennox Elite and Signature units use all-aluminum evaporator coils that trap fine lint and mildew film quickly in high-humidity San Francisco installs. When the fin pack fouls, head pressure rises and the system short cycles, even if the thermostat rarely calls for cooling.
- Weak airflow at supply registers. When a Lennox blower seems weak, the real cause is often crushed flex duct in a subfloor chase or a clogged filter. In San Francisco’s retrofit-heavy housing, we find kinked runs in walls where no one has looked in decades. Cleaning the duct interior and resealing takeoffs restores airflow without touching the motor.
Lennox Service in San Francisco: What Local Conditions Mean for Your Equipment
Here’s the thing about San Francisco that confuses people who move here from inland: your Lennox system can grow mold even if the air conditioner has never been switched on. The marine fog layer keeps western neighborhoods like the Outer Sunset and Outer Richmond in near-constant high humidity for weeks at a time. Ambient moisture infiltrates flex-duct joints and poorly sealed plenums, promoting microbial growth at temperatures far too low to trigger AC use. Technicians working the Outer Sunset regularly pull flex duct sections with visible mold colonies from homes whose thermostats have never been set above 68°F and whose AC switch has never been touched. The fog does the damage entirely on its own. Drive a few miles east to the Mission or Potrero Hill, where the microclimate is sunnier and drier, and the same Lennox equipment stays comparatively dry. That’s why brand-and-block-specific knowledge matters. A cleaner who treats every Lennox install in San Francisco the same way misses what’s actually happening in your ducts.
Lennox Models & Products We Service in San Francisco
We work on the full Lennox residential line, including the Merit Series (13ACX, 14ACX, and G61-style equipment), Elite Series (XC14, XC16, and EL-series air handlers), and the Dave Lennox Signature Collection (XC21, XC25, and SL-series air handlers). We also service Lennox Healthy Climate indoor air quality accessories, including MERV filters and media cabinets. For parts, we use OEM-equivalent or better-than-OEM components for blower motors, control modules, coils, and drain pans. When a proprietary part like a specific control board or ECM module requires an exact match, we source genuine Lennox components. We stock common Lennox drain pans, blower wheels, and filter media locally for fast San Francisco turnaround, and we push repair whenever the equipment is mechanically sound and the real problem is filthy ducts, coil, or blower.
Lennox Service Pricing in San Francisco
Full Lennox air duct cleaning in San Francisco typically runs $600 to $1,100, depending on how many returns and supplies your system has and how accessible the duct runs are. Victorian flats with awkward subfloor chases tend toward the higher end because access takes longer. Evaporator coil cleaning on a Lennox Elite or Signature air handler adds $150 to $300. Blower cleaning runs $100 to $200. The price is put in writing before any work begins, every single time. No surprise invoices at the end. Call (980) 447-2498 for a free estimate and we’ll tell you exactly what your Lennox system needs and what it will cost.
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
Yes, and in San Francisco this is precisely when duct cleaning matters most. The marine fog keeps relative humidity high in western neighborhoods even when your Lennox system sits idle. Moisture infiltrates flex-duct joints and plenum connections, and mold grows at temperatures far below what would ever trigger AC use. A system that never runs still collects dust, lint, and biological film in the coil pan and duct interior. If you smell must at the registers, the ducts need attention regardless of runtime. Call (980) 447-2498 for an assessment.
The fog. Inland California cities like Sacramento or Fresno have hot, dry summers that bake moisture out of duct systems. San Francisco’s marine layer keeps ambient humidity above 70% for weeks at a time in neighborhoods west of Twin Peaks. That moisture condenses on cool coil surfaces and seep into poorly sealed plenums, creating conditions for microbial growth even without air conditioning use. The same Lennox equipment that stayed dry in Fresno will foul in the Outer Sunset. Call (980) 447-2498 and we’ll explain what your specific microclimate is doing to your system.
Yes. We clean Lennox evaporator coils in place using professional-grade equipment from Rotobrush and Nikro, with coil-safe cleaning agents that won’t damage all-aluminum construction. Most Elite and Signature air handlers have accessible coil panels that let us reach the fin pack without disconnecting refrigerant lines. The job usually takes two to three hours and restores proper heat transfer and airflow. Call (980) 447-2498 for a coil-specific quote.
In San Francisco, it’s usually the ducts. Lennox high-static ECM blowers pull hard against undersized or crushed retrofit returns, but in Victorian and Edwardian flats the real culprit is often flex duct that’s been kinked in a wall chase or a filter that’s been neglected. We test static pressure and inspect the duct runs before recommending any motor work. If the blower itself is failing, we use OEM-equivalent or better parts, and we’ll show you the test results before you spend a dollar. Call (980) 447-2498 to schedule a diagnostic.
When a proprietary part like a specific Lennox control board or ECM module requires an exact match, we source genuine Lennox components. For standard items like blower motors, coils, and drain pans, we use OEM-equivalent or better-than-OEM parts that meet or exceed original specifications. Every repair carries our written guarantee with a free second visit if the repair fails, so the part choice is backed in writing. Call (980) 447-2498 and we’ll walk you through what your system actually needs.
Service Areas Near San Francisco
We serve all of San Francisco, including the Outer Sunset, Richmond, Haight, Castro, Noe Valley, Mission, and Potrero Hill. For readers outside the Bay Area, we also offer San Francisco service area details and comparable coverage in cities like Lennox service in Seattle and Lennox service in Nashville-Davidson.
Book Your Lennox Service in San Francisco Today
We were called to a stacked two-unit flat in the Outer Sunset where a second-floor Lennox Elite air handler had never been run in cooling mode, yet the supply registers smelled musty year-round. Pulling the flex-duct takeoff at the Lennox plenum, our tech found a mold colony and a failed collar gasket, plus a slime-coated evaporator coil. We cleaned the coil and blower, sealed and re-insulated the plenum connection, and rerouted the soggy flex run - all part of our Dryer Vent Cleaning in San Francisco service approach. The odor was gone on the first day the fog rolled back in.
Clean ducts don’t fix everything, but dirty ones can quietly make a lot of things worse. If your Lennox system smells, underperforms, or hasn’t been inspected in years, call (980) 447-2498 for a free estimate. We’ll put the price in writing before any work begins, and you’ll know exactly who’s coming to your door before we arrive.
Written by Marcus Veale, Owner at Linden Air Duct Cleaning, serving San Francisco since 2004.