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 Leandro, CA
We provide independent Lennox air duct cleaning across San Leandro, and the one thing that separates our work here is that we know exactly what’s inside these mid-century ranch systems after decades of marine-layer idleness. Lennox furnaces in this city’s 1940s-1970s tracts collect a specific kind of debris: acorn caches, rodent nesting, and fiberglass fallout from failing plenum liners. We show up with Rotobrush and Nikro rigs, not a shop vac and a flashlight. Call (855) 356-5880 for a free estimate.
Why San Leandro Residents Choose Us for Lennox Service
Our owner Sal Underwood grew up in the Estudillo Estates neighborhood, so he’s spent his whole life around the exact housing stock we service. He trained through the HVAC/R program at Chabot College in Hayward, then spent well over a decade in the trade before starting Duct Cleaning San Leandro in 2018. When we open up a Lennox cabinet in San Leandro, we’re not guessing what we’ll find. We know the G-series and Merit units in these older homes, we know how their filter slots and bottom-panel gaskets fail, and we know what eight months of sitting idle does to a system near the Bay. We clean it and fix it. That repair capability is why homeowners call us instead of a generalist cleaner who’ll pull debris out of the registers and leave the underlying leak unfixed.
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 San Leandro
- Debris buildup in the return plenum from idle months. San Leandro sits in the fog belt, so furnaces run only a few months a year. G-series and Merit cabinets often have loose bottom-panel gaskets and unsealed filter slots, and dust plus rodent debris settles in the return plenum while the system sleeps. At first fall startup, all of it blows through the supply runs. We clean and mastic-seal those openings.
- Fiberglass liner degradation in older plenums and transition ducts. Lennox used factory-fiberglass interior lining in many plenums from this era. The mild damp air off San Francisco Bay breaks that lining down over time, and fibers shed into the duct runs. You’ll see the fallout at registers when the blower first kicks on. We replace the deteriorated liner with foil-backed insulation.
- Rodent debris and acorn caches in cold-air returns. In the older tracts off Estudillo and near the BART corridor, rats use the cold-air returns as highways from nearby creek corridors and the shoreline. Lennox evaporator coil pans and drain lines in horizontal attic installs collect acorn hulls and nest material, which causes standing water and mold growth in poorly insulated runs. Return-duct cleaning here is as much pest-debris removal as dust removal.
- Blower wheels caked with fiberglass dust and debris. Because Lennox systems in San Leandro sit idle for so much of the year, the blower wheel becomes a collection point. We regularly find it coated with a mix of fiberglass dust from failing plenum liners and fine roof-space dust pulled in through unsealed return chases. A dirty blower wheel moves less air and works the motor harder.
- Stress cracks and seam separation in 1970s-era heat exchangers. Lennox heat exchangers in furnaces built during that decade show stress cracks and seam separation after decades of short, seasonal cycling. The system never runs long enough to burn off moisture, and the repeated heating/cooling takes a toll. We tell homeowners straight when a heat exchanger is worth repairing and when replacement is the honest call.
Lennox Service in San Leandro: What Local Conditions Mean for Your Equipment
Because San Leandro’s marine layer keeps Lennox furnaces idle for eight or nine months, the cold-air returns in the Estudillo tracts accumulate acorn caches and rodent nests that homeowners never smell until the first fall heat cycle. A homeowner on a 1950s ranch off Estudillo Avenue called us about a burning smell at startup. We pulled the Lennox G61 furnace apart and found the cold-air return packed with acorns and rat nesting, the blower wheel caked with fiberglass dust from a failing plenum liner. We cleaned and sealed the return, replaced the deteriorated liner, and mastic-sealed the cabinet joints. The next cycle ran clean. That’s the difference between a company that understands San Leandro’s specific housing and climate pressure and one that treats every Lennox job like it’s in a new subdivision in San Ramon.
Lennox Models & Products We Service in San Leandro
We service Lennox residential forced-air systems across San Leandro’s mid-century tracts, including the G61 and G71 furnace series, the older Merit lines (ML and EL), Elite Series furnaces, and CBX air handlers paired with those systems. Our techs know where Lennox cabinets leak and how their coil pans trap debris. When we repair ductwork on a Lennox system in San Leandro, we use Lennox OEM gaskets, filter racks, and coil pans when they’re available and fit the cabinet. For sealing and insulation work, we rely on quality aftermarket mastic and flex duct because the factory parts for older Merit and G-series cabinets are often discontinued. We’re an independent shop, not a Lennox dealer, and we don’t pretend otherwise.
See the difference
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After
Before
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Before
AfterLennox Service Pricing in San Leandro
Air duct cleaning on a Lennox system in San Leandro typically runs between $450 and $900 for a full residential system, depending on home size, number of returns, and how much debris has accumulated in the runs. Return-duct cleaning alone usually lands between $150 and $350. Duct sealing runs $250 to $600 for a typical ranch home, more if we’re re-insulating a full plenum. Dryer vent cleaning runs $100 to $250. What drives the price is access, the condition of your existing liner, and whether you need repair work alongside the cleaning. Our estimate is free, and the written estimate sets the final price. Call (855) 356-5880 to get a number that’s specific to your system.
Serving San Leandro, CA – Our Local Coverage Area
We serve San Leandro and nearby communities. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
FAQs – Lennox Air Duct Cleaning in San Leandro
That smell is almost always a combination of settled dust, fiberglass fibers from a degrading plenum liner, and pest debris that’s accumulated in your return ductwork during the months the system sat idle. In San Leandro’s marine climate, Lennox furnaces routinely sit unused from spring through early fall, and everything that settles or nests in the ducts gets baked on the heat exchanger when you fire it up. We clean the return, the supply runs, and the blower wheel during a full system cleaning. Call (855) 356-5880 and we’ll walk through what you’re smelling and what it’ll take to fix it.
Yes, and we do it regularly in San Leandro’s older ranch tracts. The original sheet-metal ducts are actually cleanable and sealable with the right tools, the issue is usually the interior lining and the cabinet joints. We evaluate the liner condition during the estimate. If it’s shedding fiberglass, we replace it. If the metal itself is sound, we mastic-seal the seams and joints and run our Rotobrush through the full system. Some 1970s Lennox furnaces are absolutely worth keeping, and we’ll tell you honestly if that’s the right call for yours.
If you hear scurrying sounds in your ceilings or walls near the vents, find droppings near register grilles, or smell a stale, musky odor when the system runs, rodents have likely been using your cold-air returns. This is common in the older neighborhoods off Estudillo and near the BART corridor, where rats travel from the nearby creek corridors. We find acorn caches and nest material inside Lennox return plenums on a regular basis. If you notice any of these signs, call (855) 356-5880 for a free estimate. We’ll inspect the returns and let you know what we find.
It depends on where the mold growth is. If the musty odor is coming from inside the duct runs or the plenum, a full cleaning with our Nikro HEPA-vacuum equipment and air-scrubbing unit will remove the organic material mold feeds on. But in San Leandro’s damp, mild climate, mold often starts at the evaporator coil or in a poorly insulated duct run where condensation forms, and that requires cleaning the coil and sealing or replacing the damp insulation. Duct cleaning alone won’t fix a mold problem at the source. Call (855) 356-5880 and we’ll figure out where the smell is actually coming from.
We use Lennox OEM gaskets, filter racks, and coil pans when they’re available and fit the cabinet. For sealing and insulation work, we use quality aftermarket mastic, foil-backed insulation, and flex duct because the factory parts for older Merit and G-series cabinets are often discontinued. We’re an independent Lennox service provider, not a factory-authorized dealer, so we’re free to choose the part that actually works best for your system rather than the one Lenox still happens to stock.
Service Areas Near San Leandro
We service Lennox systems throughout San Leandro and the surrounding East Bay, including Oakland, Hayward, Berkeley, and San Mateo. If you’re in Castro Valley or Hayward with a Lennox furnace, call us. We’ll bring the same equipment and the same straight answers we bring to every San Leandro job.
Book Your Lennox Service in San Leandro Today
If you can’t remember the last time your ducts were cleaned, that’s usually answer enough. Call (855) 356-5880 for a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. One visit, clean ducts, sealed repairs, safer dryer vent.
Written by Sal Underwood, Owner at Duct Cleaning San Leandro, serving San Leandro since 2018.