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 Boulder, CO
We provide independent Lennox air duct cleaning, sealing, and repair across Boulder. What makes our Lennox work here different is timing: we treat duct cleaning as smoke-event recovery, not a spring chore. Boulder’s air carries wildfire particulate and Chinook-driven dust that gets pulled straight into the return side of your Lennox system, and the failures we find most often are ash-packed return boots and clogged coils. Our technicians have up to 9 years of experience and arrive with Rotobrush contact-cleaning and Nikro negative-air/HEPA machines. Call (877) 550-7147. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Why Boulder Residents Choose Us for Lennox Service
Homeowners in Boulder tend to call us for one of two reasons: their Lennox system smells like a campfire after a fire week, or their airflow has been dropping for a summer and nobody can tell them why. Neither question is answered by a cheap sweep-and-vacuum visit. They want to know what is actually happening inside the ductwork and the air handler.
We’re an independent shop. We’re not affiliated with, authorized by, or endorsed by Lennox, and we won’t pretend otherwise. What we do know is how Lennox builds things. The return-side geometry on a Merit Series furnace, the way an Elite air handler sits inside its own closet, the coil cabinet design that shares space with an XC condenser match – we work on these systems often enough to know where smoke residue collects and where airflow bottlenecks hide. Parts that fit matter as much as labor. We use genuine Lennox components for critical pieces like heat exchangers and control boards, and quality aftermarket materials for duct sealing and filtration, because those don’t carry the same engineering stakes.
Scheduling is straightforward. Tell us what you’re seeing and hearing, and we’ll book a window that works. We also work across the wider Boulder area, and our team is trained on the whole indoor air picture, including whole-home filtration from Honeywell and Aprilaire.
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 Boulder
These are the patterns we see again and again on Lennox equipment in Boulder homes.
- Cracked or rusting heat exchangers in older Merit and Elite furnaces. Wildfire smoke and fine ash drawn into the return coat the exchanger and accelerate corrosion. A cracked exchanger is a combustion safety issue, not just a performance one, and we flag it honestly.
- Clogged evaporator coils, often paired with XC series condensers. Smoke residue and dust pack the coil fins, airflow drops, and you’re left with frozen coils or high head pressure. Cleaning the coil restores performance more reliably than chasing symptoms.
- Leaky flex duct joints connected to Lennox air handlers. In Boulder crawlspaces, banded flex runs pull in smoke and attic dust during Chinook wind events. The system pressurizes and deposits soot into return boots. Sealing those joints is often the real fix.
- Sticky blower wheels. Smoke particles leave a tacky film on the wheel, throwing it off balance and straining the motor. High-performance homes with otherwise sealed ductwork aren’t immune – they just hide the problem better.
- Smoky odors that return every fire season. That’s a duct and return-boot problem, not a filter problem. Replacing filters more often won’t stop ash that’s already settled in the joints.
Lennox Service in Boulder: What Local Conditions Mean for Your Equipment
South Boulder’s mid-century ranches are the clearest example. Many of these homes have Lennox systems connected to banded flex duct that vents directly outdoors. During a Front Range smoke event, that ductwork behaves like a chimney: the pressure differential pulls outside air and particulate into the run, and ash ends up packed into the return boots. It’s why we see so much smoke residue on the return side in those neighborhoods and so little in newer Gunbarrel builds with sealed rigid ductwork. It also explains why cleaning right after fire season does more for a Lennox system than the same job done in May. And Boulder’s energy-efficiency culture makes it worse in a way: tight high-performance homes in east Boulder push the same smoke through a smaller number of return paths, so the residue concentrates instead of spreading thin.
Lennox Models & Products We Service in Boulder
We work on the full Lennox lineup found in Boulder homes: Merit Series furnaces such as the ML195 and ML180, Elite Series furnaces and air handlers like the EL195 and EL280, and Dave Lennox Signature Collection equipment including the SL280 and SLP98. We also service XC and XC21 air conditioners and their matched coils. What we’re careful about is parts selection. Critical components – heat exchangers, control boards – get genuine Lennox parts. Duct sealing materials and filtration get quality aftermarket options that fit properly. We don’t stock parts or keep inventory; we source what the job needs. If you want to understand the wider range of equipment we handle beyond Lennox, see our Lennox service overview.
See the difference
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After
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Before
AfterLennox Service Pricing in Boulder
Every job is priced per system by a written estimate agreed before any work starts. We don’t quote per vent, and we don’t advertise a teaser figure that grows once a technician is on site. The variables that move cost are straightforward: how many returns and supply runs serve your system, whether the ducts are accessible flex in a crawlspace or sealed rigid runs, how much sealing is needed, and whether coil cleaning or blower service is part of the scope. A free estimate includes video inspection of the duct runs so you can see the condition of the return boots and joints yourself. If the estimator finds something that changes the scope, you hear about it before the written price is set. Call (877) 550-7147 for an exact quote. Estimates are free.
Serving Boulder, CO – Our Local Coverage Area
We serve Boulder 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 Boulder
Because smoke particulate is sitting in your return ductwork and return boots, not because the furnace itself is burning. Front Range smoke gets drawn into leaky returns and the smell lingers in the ducts long after the air clears outside. Cleaning the return and supply runs is the fix. Call (877) 550-7147 for a free estimate.
Often, yes. Musty odors in a Gunbarrel home usually trace to dust and organic residue on the evaporator coil or in a damp duct joint, not to the blower itself. Coil cleaning plus duct cleaning addresses the source. Call (877) 550-7147 to schedule an inspection.
For south Boulder ranches with banded flex duct venting outdoors, plan on cleaning and sealing after a smoke event rather than on a calendar. Older flex duct in crawlspaces and attics pulls in smoke and dust whenever winds drive it, so post-event service beats a fixed annual schedule. Call (877) 550-7147 and we’ll talk through your system.
Yes. Sealing leaky flex connections reduces the outdoor air your system pulls in during Chinook wind events, which means less smoke load and less wasted conditioned air. It’s the practical fix, more so than adding filters. Call (877) 550-7147 for a free estimate on sealing.
Stop running the system and get it inspected. A cracked heat exchanger can leak combustion gases into your living space, so this is a safety issue and not something to troubleshoot yourself. We use genuine Lennox parts for exchanger work, and on older systems replacement is often more cost-effective than repair. Call (877) 550-7147 for an assessment.
Service Areas Near Boulder
We serve Boulder and the surrounding communities, including Longmont, Westminster, Arvada, Thornton, and Lakewood. If your Lennox system is pulling in smoke or losing airflow anywhere in that footprint, we can take a look.
Book Your Lennox Service in Boulder Today
Call (877) 550-7147 for a free estimate on Lennox air duct cleaning, sealing, or repair in Boulder. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. Estimates are free and the written price is set per system before any work starts.
Written by the team at Boulder Duct Cleaning.