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 Altadena, CA
We provide independent Lennox air duct cleaning across Altadena, and the one thing that separates our work here is understanding what the 2025 Eaton Fire left behind inside these systems. Fine grey ash settles in return plenums and on evaporator coils even when a home never showed visible smoke damage. If your Lennox equipment has been pulling air through that residue, it is recirculating particles that standard filter changes never touch. Call (833) 734-6877 and we will inspect what is actually sitting in your ductwork.
Why Altadena Residents Choose Us for Lennox Service
We have spent 15 years inside the duct systems of homes throughout this part of Los Angeles County, and Lennox equipment shows up often in Altadena’s mid-century ranches. These are well-built furnaces and air handlers, but the ductwork attached to them is frequently the weak point. Flexible runs added decades after construction sag, separate at the joints, and become collection points for ash and dust that a filter alone cannot catch.
Ruben Castillo, our owner, started in the sheet metal and HVAC program at Rio Hondo College before focusing on air duct cleaning specifically. That training in airflow and pressurization shapes how we approach every Lennox job. We do not just run a brush through the trunk line and call it done. We look at the whole path air travels through your home, because a clean trunk line means nothing if the branch runs are leaking or coated in residue.
We also repair ductwork, not just clean it. When a flex joint has separated or a return plenum is drawing from an unconditioned attic space, that is a duct problem as much as a cleaning problem. We fix both on the same visit. We are an independent Lennox service provider, not a manufacturer affiliate, and we use professional-grade Rotobrush and Nikro equipment rather than shop-vac setups.
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 Altadena
- Fine grey ash in return plenums. Homes above Altadena Drive in the 91001 area frequently show ash coating the inside of the return plenum, left behind by the Eaton Fire. This residue sits upstream of the filter and gets pulled across the evaporator coil whenever the system runs. We remove it with negative-pressure extraction, not just surface wiping that leaves the fine particles behind.
- Sagging and separated flexible duct runs. Many older Altadena ranch homes had flex ducting added years after the original Lennox furnace was installed. Those runs sag over time, and the joints pull apart where they meet rigid trunk lines. Once separated, they draw attic air loaded with ash and dust directly into the supply side. We find these failures during cleaning and reseal them with mastic.
- Dust-packed blower motors from continuous summer operation. Altadena summers run hot and dry, and Lennox air handlers in tight closets or attics cycle constantly. Blower wheels accumulate a baked-on layer of dust that reduces airflow and forces the motor to work harder. Cleaning the blower assembly restores proper airflow and cuts down on the fine dust settling back onto furniture.
- Evaporator coils coated with bypassed ash. Standard one-inch filters do not catch the fine grey ash from a burn scar. What slips through ends up on the evaporator coil, where it mixes with condensation and forms a paste that insulates the coil and reduces cooling efficiency. Coil cleaning is part of what we do on Lennox systems, not an add-on you have to ask for.
- Leaky return plenums drawing ash-laden attic air. Return plenums in 1950s and 1960s homes were often built with gaps that were never sealed properly. When the blower runs, those gaps pull negative pressure from the attic and whatever is floating in it. After a wildfire season, that means ash and char particles circulating through your Lennox system even with new filters installed.
Lennox Service in Altadena: What Local Conditions Mean for Your Equipment
The burn scar above Altadena has changed what we expect to find when we open a Lennox system in this community. Homes in the foothill streets above Altadena Drive, even ones with no visible smoke staining, often have a fine grey dust coating the inside of return plenums and the leading edge of evaporator coils. It is not ordinary household dust. It is ash that got pulled in during the fire and the months after, when the air was thick with particulate that standard filters could not handle. That residue is unique to this burn scar area, and it behaves differently in a duct system than typical Southern California dirt. It is lighter, finer, and it moves further downstream before settling. On a Lennox air handler with flex ducting, that means it reaches the coil and the supply runs in a way normal dust never does. We treat it as a separate contaminant layer, not just another pass with the brush. If the air in your home is moving through dirty ducts, you’re just recirculating the problem.
Lennox Models & Products We Service in Altadena
We service the entire range of Lennox residential equipment found in Altadena homes, including Merit Series furnaces and air handlers, Elite Series variable-speed systems, and Dave Lennox Signature Collection high-efficiency models. We also work with Lennox Healthy Climate indoor air quality accessories like media filters and UV lamps, because duct cleaning only matters if the air passing through those newly cleaned ducts is as clean as it should be.
When a repair is needed, we use OEM Lennox parts for critical components such as heat exchangers and control boards when they are available, and quality aftermarket equivalents for common wear items like blower motors and filters. We do not claim to be a Lennox dealer or authorized service center. We are an independent shop that knows these systems from years of hands-on work.
See the difference
Before
After
Before
After
Before
AfterLennox Service Pricing in Altadena
Air duct cleaning for a Lennox system in Altadena typically falls between $450 and $750 depending on the size of the home, the number of supply and return runs, and whether there is significant ash residue from the Eaton Fire. Evaporator coil cleaning generally runs $150 to $300, and air leak repair such as sealing separated flex joints or return plenum gaps adds $200 to $500 depending on how much access and mastic work is involved. Homes in older construction with tight attic access or heavily contaminated systems land at the upper end of those ranges.
Every job starts with a free estimate. We give you one flat price per system before any work begins, so the written estimate is the number you pay. No per-vent pricing, no surprise add-ons once the van is in the driveway. Call (833) 734-6877 for an exact quote on your Lennox system.
Serving Altadena, CA – Our Local Coverage Area
We serve Altadena 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 Altadena
Ash particles from the Eaton Fire were fine enough to get pulled into return ducts and past standard filters, settling in the plenum and on the evaporator coil even in homes without visible smoke staining. We find this grey residue in the 91001 area frequently, and proper removal requires negative-pressure extraction plus coil cleaning. Call (833) 734-6877 and we can tell you whether your system has this residue before you commit to anything.
It often is. Flex runs that were added to an original Lennox furnace decades ago tend to sag and separate at the joints, and those gaps pull ash-laden attic air into the supply side. We inspect those connections during cleaning and seal any leaks with mastic so the cleaning actually holds.
Yes. We use coil-appropriate cleaning methods that remove the ash and dust buildup without bending fins or flooding the air handler. Coil cleaning is part of a complete duct cleaning on Lennox systems, because a dirty coil undoes the benefit of clean ducts.
For critical components like heat exchangers and control boards, we use OEM Lennox parts when they are available. For common wear items such as blower motors and filter housings, we use quality aftermarket equivalents that match the specifications. We are an independent provider, so we are not locked into any single parts source, which lets us give you honest options.
Given the Eaton Fire residue and the recurring wildfire risk in the San Gabriel foothills, most Altadena Lennox owners should plan on a thorough duct and coil cleaning every 2 to 3 years, and sooner if you notice a lingering smoky odor or visible dust around supply registers. Homes directly below the burn scar may need it more often. Call (833) 734-6877 and we can give you a recommendation based on what we find during the estimate.
Service Areas Near Altadena
We also provide Lennox air duct cleaning in Pico Rivera, Monrovia, Bell Gardens, West Whittier-Los Nietos, Bell, and San Gabriel. We work throughout the San Gabriel Valley and southeast LA County, including Temple City and the surrounding foothill communities. For more about our Lennox work, see our Lennox service page or our main Altadena area page.
Book Your Lennox Service in Altadena Today
If your Lennox system has been moving air through ducts that have not been inspected since before the Eaton Fire, now is the time to find out what is in there. We offer a free estimate with no obligation, and we will tell you honestly whether cleaning is warranted. Call (833) 734-6877. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Written by Ruben Castillo, Owner at Duct Cleaning Pico Rivera, serving Altadena since 2011.