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 Dimas, CA
If you own a Lennox system in San Dimas, you’re likely dealing with something most duct cleaners miss: the return plenum near your garage pulling Santa Ana dust straight into the blower. We provide independent Lennox air duct cleaning across San Dimas, with a focus on the cabinet, plenum, and coil problems that show up on this equipment after years of foothill winds and hot attic summers. Led by Barry Walsh, our crew started in 2015 and has cleaned hundreds of Lennox systems here. Call (833) 589-9571 for a free estimate.
Why San Dimas Residents Choose Us for Lennox Service
We work on San Dimas Lennox equipment weekly, not occasionally. That matters because a Lennox horizontal furnace in a 1970s attic doesn’t fail the same way a newer unit in a coastal tract does. Barry Walsh grew up in the Pomona Valley and trained in HVAC and mechanical systems at Mt. San Antonio College in Walnut, where hands-on coursework in air handling and ventilation built the foundation he still uses on every job. He worked in the trade for over a decade before starting Duct Cleaning Pomona in 2015, and that experience shows in the way we pull every register cover and check the plenum transitions rather than just blowing air through the system.
We’re an independent duct and HVAC service company. We are not authorized, sponsored, or endorsed by Lennox. What we bring instead is familiarity with how their cabinets are built, where the gasketing fails in hot attics, and which cleaning methods actually remove the grit that builds up after a San Dimas fall wind season. When you schedule with us, you get a crew that cleans it, then fixes it if we find separated duct or a failed seal.
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 Dimas
- Cabinet and plenum seam leaks on older Lennox horizontal furnaces. In 90 – 100°F attic heat, the gasketing and mastic at the supply transition dry out and crack. Once that seal fails, the blower pulls its return air from wherever it can get it, including the dusty attic space and the garage wall cavity.
- Settled or collapsing flex duct runs off Lennox air handlers. Homes built in the 1960s through 1980s often still have their original flex runs. The return collar sags over time, the run kinks, and airflow drops. The evaporator coil then loads up with whatever the restricted airflow deposits.
- Dirty evaporator coils in Lennox CBX and CBA cabinets. After a May through October cooling season where the system runs nearly nonstop, fine mountain dust passes the filter and packs the coil face. That leads to short cycling, higher static pressure, and a system that struggles to hold temperature.
- Rodent intrusion at the return plenum near garages. San Dimas homes backing onto the foothill washes see rodent activity that coastal basin crews rarely encounter. Droppings and nesting debris in the return duct feeding a Lennox air handler is a real health issue and a job for contact cleaning plus sealing.
- Grit and ash pulled into return-air grilles during Santa Ana winds. The dry fall winds funnel fine dust and wildfire ash through the valley, and return grilles on the leeward side of the house collect it. That grit ends up in the blower housing and coil unless the return side is cleaned and sealed properly.
Lennox Service in San Dimas: What Local Conditions Mean for Your Equipment
San Dimas sits at the base of the San Gabriel Mountains where the dry Santa Ana winds funnel through the valley each fall. Homes along the foothill edges, especially the ranch-style and two-story layouts with return plenums near the garage, take the worst of it. The garage often shares a wall with the return plenum, and when the mastic and gasketing on that plenum age and crack, the negative pressure from the blower pulls windblown dust and rodent debris from the garage wall cavity directly into the airstream. We open those plenums on a regular basis and find grit packed into the blower wheel and caked on the Lennox coil face. Cleaning the ducts without repairing that plenum seal would be half a job, because the system would just pull the same contamination back in. On a ranch-style home near the foothills, we opened a Lennox G60 furnace cabinet and found the return plenum seal at the garage wall had failed, pulling windblown dust and rodent debris into the blower and evaporator coil. We vacuumed and sealed the return, cleaned the coil and blower, and re-mastic’d the plenum so the system pulled clean attic air again. That sequence, clean it then fix it, is what this housing stock requires.
Lennox Models & Products We Service in San Dimas
Our work covers residential and light-commercial Lennox equipment across San Dimas. That includes older G60 and G61 series gas furnaces still running in 1990s tract homes, ML180 and EL180 Merit series furnaces, XC13 and XC16 air conditioners paired with Merit or Elite air handlers, and CBX and CBA evaporator coil cabinet lines. We focus on return duct cleaning, duct sealing, and evaporator coil cleaning, because those are the three jobs that most directly affect how a Lennox system performs after years of local wind and heat. When a cabinet door, coil, or control component needs an exact fit, we use OEM Lennox parts. When a quality aftermarket gasket, mastic, or flex section saves money without hurting performance, we use that instead. We tell you honestly when sealing and cleaning will restore the system, and when a 20-plus-year-old cabinet or coil is past the point where repair makes sense.
See the difference
Before
After
Before
After
Before
AfterLennox Service Pricing in San Dimas
Duct cleaning on a Lennox system in San Dimas typically runs from $450 to $1,100 for a full single-system cleaning, depending on the number of returns, the condition of the flex runs, and accessibility in the attic or crawlspace. Evaporator coil cleaning runs $200 to $500 as part of the job, and duct sealing or plenum repair ranges from $300 to $800 depending on how much mastic, gasketing, and re-connection work is needed. A dryer vent cleaning is $150 to $250. These are the estimated ranges we quote before seeing the system; the written estimate sets the final price. Every estimate is free. Call (833) 589-9571 to get one scheduled.
Serving San Dimas, CA – Our Local Coverage Area
We serve San Dimas 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 Dimas
The answer is usually both. A G60 in a San Dimas attic has likely lost its plenum seal or gasketing, so the blower is pulling attic dust and garage-wall grit into the supply side. We clean the ductwork with our Rotobrush contact-cleaning system and Nikro HEPA negative-air extraction, then we repair the seal so the dust doesn’t return. Call (833) 589-9571 and we’ll diagnose it properly.
Yes, especially if your return plenum is near the garage on a foothill-edge lot. The dry fall winds push fine mountain dust and ash into return-air grilles, and a cracked plenum seal turns that into a direct line into your blower and coil. We see it every fall in San Dimas.
Every three to five years in a typical San Dimas home, and closer to every two to three years if you back onto a foothill wash or run your system hard from May through October. A packed coil drives up static pressure and shortens compressor life, so we treat coil cleaning as a maintenance step, not an upsell.
We treat that as a cleaning plus sealing job. The droppings and nesting debris get extracted with HEPA negative-air equipment, the return duct gets contact-cleaned, and we seal the entry point at the plenum or collar so it doesn’t recur. San Dimas homes backing onto the washes need this more often than people expect. Call (833) 589-9571 for an exact plan and quote.
No. We are an independent duct and HVAC service company, not authorized, sponsored, or endorsed by Lennox. What we bring is hands-on experience with Lennox cabinet and plenum construction, and the abatement-grade extraction equipment most duct cleaning companies don’t run.
Service Areas Near San Dimas
We serve San Dimas and the surrounding foothill communities, including Pomona, Glendora, Rancho Cucamonga, Chino, Chino Hills, Diamond Bar, and Upland. If you’re in 91773 or nearby and want a crew that knows Lennox equipment and Santa Ana wind dust, call us.
Book Your Lennox Service in San Dimas Today
Call (833) 589-9571 for a free estimate on Lennox air duct cleaning, duct sealing, or evaporator coil cleaning in San Dimas. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Written by Barry Walsh, Owner at Duct Cleaning Pomona, serving San Dimas since 2015.