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 Ontario, CA
We clean Lennox duct systems across Ontario, working on everything from mid-century G60 furnaces in the 91762 grid to CBX air handlers in newer stucco subdivisions. The one thing that makes our Lennox work different here is simple: Ontario’s returns load with gray Cajon Pass grit, not pet hair. That changes what we clean, how we clean it, and why a Lennox system in this city needs return-side attention tied to filter change timing. Call (877) 265-9115 for a free estimate, and ask about our Rotobrush and Nikro equipment before you book anyone.
Why Ontario Residents Choose Us for Lennox Service
We work on Lennox equipment every week across the Inland Empire. Merit-series furnaces, Elite air handlers, Signature variable-speed systems, CBX multi-position units from the 1980s and 1990s tract builds. Our credibility comes from what we find inside those systems in Ontario, not from any Lennox authorization, which we do not have and do not claim. Ron Stafford runs Timberline, and he started this company after tracing his own family’s allergy problems back to neglected ductwork. He put himself through the mechanical side of HVAC at Chaffey College in Alta Loma, then spent years doing hands-on duct work across the Inland Empire before narrowing his focus entirely to air duct cleaning. That focus shows up in the equipment we run: Rotobrush rotary brush systems, Nikro HVAC cleaning gear, and Abatement Technologies negative-air containment. Professional-grade machinery, not wand-only shortcuts. We also do Lennox sales & service support work that ties back to the same gear.
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 Ontario
- Variable-speed blowers pulling high static in 100°F summers. Signature and Elite air handlers run near continuous duty when Ontario hits triple digits. Grit-compacted evaporator coils drive static up until airflow faults and frozen coils appear. We clean the coil and the return side, then verify airflow.
- G60 furnace cabinets packed with attic dust and spliced flex. In older 91761 and 91762 homes, Merit-series G60 and G40 furnaces often sit against flex-duct retrofits spliced into dusty attics. Gray Cajon Pass grit collects in the return plenum and loads the secondary heat exchanger and blower wheel.
- Sealed combustion cabinets pulling attic air through leaky returns. Lennox’s gasketing assumes the cabinet sees filtered air. When mid-century ranch returns leak and go negative, attic dust gets drawn straight into the cabinet instead of through the filter. We seal what we find and clean what got in.
- CBX and CBXHD drain pans clogging with silica-laden dust. Factory condensate traps on multi-position air handlers gum up fast in Ontario’s wind-blown particulate. Water carryover follows, then rusted cabinet bottoms on hard-run summer systems.
- Filters loading twice as fast in spring. Ontario’s Santa Ana season pushes fine grit through return grilles at a rate coastal LA simply doesn’t see. Lennox owners here often swap filters every three weeks in March and April, wondering what’s wrong. Nothing’s wrong with the filter. The duct system just hasn’t been cleaned.
Lennox Service in Ontario: What Local Conditions Mean for Your Equipment
Ontario sits in the middle of the Inland Empire’s dust-and-wind corridor. Spring Santa Ana winds and the prevailing onshore flow off the Cajon Pass push fine desert grit and construction dust straight into HVAC returns. This is not dander. It’s silica and wind-blown particulate loading, and it’s milder in coastal LA or the San Gabriel Valley to the west. For a Lennox owner in the older 91762 grid near the airport corridor, that grit shows up as a fine gray film packed into the return plenum, mixed with pre-1980s construction debris from the original build – something we also see doing Lennox repair in Chino. Filters clog about twice as fast in spring here. That means a Lennox system in Ontario needs return-side cleaning tied to filter change timing, not just a once-a-decade supply-side scrub. At a mid-century ranch house off the older 91762 grid, our tech pulled the return grille on a Lennox Merit G60 furnace and found the return plenum packed with exactly that gray Cajon Pass grit, loading the blower wheel for years. We sealed a leaking flex splice in the attic, cleaned the return and supply runs, and cleaned the evaporator coil. Airflow came back near spec and the homeowner finally stopped swapping filters every three weeks each spring.
Lennox Models & Products We Service in Ontario
We cover the full Lennox residential lineup that shows up in Ontario homes. Merit Series furnaces like the G60, G40, and G50, plus their matching air handlers. Elite Series EL and ELC air handlers paired with XC outdoor units. Signature Collection SL and SLP variable-capacity systems with CBA and CBX coils. And the CBX and CBXHD multi-position air handlers that populate the 1980s-to-2000s stucco subdivisions. We use Lennox OEM parts for model-specific components like blower modules, control boards, and coil assemblies. For gaskets, mastic, flex, and sheet-metal fittings, we’ll use quality aftermarket equivalents where fit and spec are clearly the same. On older Lennox systems with multiple failed components, we tell owners honestly when cleaning and sealing is the better spend versus rebuilding a 20-year-old air handler. Our service area covers Ontario service area ZIP codes 91758, 91761, 91762, and 91764.
See the difference
Before
After
Before
After
Before
AfterLennox Service Pricing in Ontario
Duct cleaning for a Lennox system in Ontario typically runs $350 to $600 for a full system, depending on home size, the number of returns, and how much grit has accumulated. Evaporator coil cleaning adds $150 to $300. Return duct cleaning for older ranch houses in 91761 and 91762, where flex splices and attic dust are common, runs $125 to $250 per return if done as part of a full clean. Dryer vent cleaning is $120 to $200. If we find air duct repair needs during the job, we quote them separately before doing the work, never after. Every estimate is free and comes with a written flat price per system before work starts. Call (877) 265-9115 for an exact quote on your Lennox system.
Serving Ontario, CA – Our Local Coverage Area
We’re based in the Ontario area and know this community well, and we also handle Lennox service in Montclair. Use the map below to see our service coverage – if you’re nearby, we can almost certainly help.
FAQs – Lennox Air Duct Cleaning in Ontario
Ontario sits downwind of the Cajon Pass, and Santa Ana winds push fine silica grit through return grilles at a rate coastal LA doesn’t experience. Your filters are doing their job. The problem is that the grit also settles in your ducts and return plenum, so even a fresh filter sees recirculated dust. We clean the return side thoroughly and can seal leaky flex splices that pull attic dust into the cabinet. Call (877) 265-9115 and we’ll inspect your system.
Often, yes. A grit-compacted evaporator coil drives static pressure up, and on variable-speed Signature or Elite blowers in Ontario’s 100°F summers, that can trigger airflow faults and coil freezing. Cleaning the coil and the return side restores airflow and drops static. If the blower module has already failed, we’ll quote a Lennox OEM replacement as part of the repair, just as we would for Lennox in Rancho Cucamonga.
It does. Older Ontario homes in 91761 and 91762 often have flex-duct retrofits spliced into original sheet-metal runs, and those splices leak attic dust into the return. The G60 cabinet ends up collecting grit that should have stayed outside. We clean the return plenum, seal splices we find, and clean the blower wheel and secondary heat exchanger if they’re loaded.
Yes, for model-specific components like blower modules, control boards, and coil assemblies, we use Lennox OEM parts. For gaskets, mastic, flex, and sheet-metal fittings, we’ll use aftermarket equivalents where the spec matches. You’ll know which is which before we order anything.
Coastal LA ducts load with dander, hair, and marine-layer humidity, while Upland faces similar inland grit challenges. Ontario ducts load with wind-blown silica grit mixed with construction dust and, in older homes, pre-1980s debris. That grit is abrasive and compacts in return plenums and coils, and it clogs condensate traps. The cleaning approach is the same Rotobrush and negative-air containment process, but we spend more time on return-side cleaning and coil work in Ontario because that’s where the load concentrates. For an exact quote, call (877) 265-9115.
Service Areas Near Ontario
We serve Ontario and the surrounding Inland Empire, including Fontana, Pomona, Rancho Cucamonga, Upland, and Chino. If your Lennox system sits anywhere in this corridor, the same Cajon Pass grit problem applies.
Book Your Lennox Service in Ontario Today
If the air in your house has to travel through it, it’s worth knowing what’s in there. Call (877) 265-9115 for a free estimate on Lennox air duct cleaning, dryer vent cleaning, or duct repair in Ontario. We’ll bring Rotobrush, Nikro, and Abatement Technologies equipment, and we’ll show you what we found before we pack up.
Written by Ron Stafford, Owner at Timberline Air Duct Cleaning, serving Ontario and the Inland Empire.