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.
Why Boulder Homeowners Choose Lennox Air Duct Cleaning
Boulder Duct Cleaning provides independent Lennox air duct cleaning, air handler cleaning, and duct sealing in Boulder, CO. We’re not affiliated with Lennox and we’re not an authorized dealer, but our technicians work on Lennox equipment regularly and can tell you which Lennox parts fit and which aftermarket parts do the job just as well. Call (877) 550-7147 for a free estimate.
What separates our Lennox work from a generic duct cleaning visit: we know where Lennox systems actually fail. The cabinet gaskets, the coil pans, the ECM blower wheels, the foil-tape joints at the plenum takeoffs – these are the points that leak, shed, or mat down in Boulder’s dry air, and they’re the points we inspect first. Below we walk through the common Lennox problems we see across Signature Series air handlers, Merit furnaces, and older G-series equipment, and the services that solve them.
We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Key Takeaways
- We service Lennox Signature Series, Merit Series, G-series, and older 80% AFUE furnaces, plus Lennox Healthy Climate air cleaners and HRV/ERV units.
- We are an independent service provider, not a Lennox dealer, and we don’t claim factory authorization.
- Our technicians have up to 9 years of experience with Lennox cabinet, coil, and blower work.
- Our focus services for Lennox systems are Air Handler Cleaning, Supply Duct Cleaning, and Duct Sealing.
- Our technicians use Rotobrush contact-cleaning and Nikro negative-air/HEPA equipment on every job.
Why Trust Boulder Duct Cleaning for Your Lennox Air Duct Cleaning?
Lennox air handlers and furnaces have specific characteristics that reward familiarity. Signature Series equipment runs variable-speed ECM blowers in tight cabinets where the blower wheel sits close to the coil. Merit and G-series furnaces mount A-coils in cabinets that don’t leave much room for matted fins. Getting the cleaning wrong on this equipment doesn’t just miss dust – it can bend fins, stress gaskets, or leave a cabinet leaking worse than before.
Our technicians have up to 9 years of experience with this kind of work. That means knowing which Lennox OEM gaskets and cabinet insulation actually match up when we reseal a plenum, and where a quality aftermarket filter rack or flex duct run is the smarter, more durable choice. We’re not a Lennox dealer, so we don’t push brand parts where they don’t earn their place. We install OEM where fit and airflow matter, and aftermarket where they don’t. That’s the honest split.
For warranty, we scope work so we don’t disturb factory-installed components any more than the cleaning or repair requires, and we document what we did. If a specific Lennox component is still under the manufacturer’s warranty, we’ll tell you – and you can take that to an authorized Lennox dealer for compliance with their terms. Independent shop, straightforward reporting.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
Common Lennox Air Duct Cleaning Problems We Fix in Boulder
These are the Lennox failure patterns we run into most often in Boulder. Same equipment, same symptoms, same root causes. If you recognize your unit here, that’s a useful starting point.
- Signature Series cabinet gaskets shedding fibers into the supply plenum. Boulder’s dry air and years of heat cycling degrade the foil-faced insulation inside the air-handler cabinet. The material starts to fray, the blower pulls the fibers into the supply, and you get dusty registers within days of a filter change. The fix is pulling the cabinet panels, cleaning the interior, and resealing with new OEM gaskets and cabinet insulation.
- Merit and G-series A-coil matting and condensate-pan sludge. When the A-coil is mounted in a tight cabinet, condensate pans accumulate sludge and coil fins mat down. Return airflow drops, static pressure climbs, and the ducts look clean while the equipment chokes. Cleaning the coil properly means pulling it or getting proper access, then washing the pan and treating the drain.
- ECM blower wheels packed with lint and dust. Lennox variable-speed blowers pull lint into the wheel over time. An out-of-balance wheel vibrates and can sound like a failing motor. We regularly see this misdiagnosed as an ECM module replacement when a clean blower wheel solves it. That mistake costs real money.
- Cracked foil-tape and mastic at plenum takeoffs and the air-cleaner cabinet. Low-humidity Boulder winters cause foil tape to peel and mastic to crack at the joints between the Lennox plenum and the supply trunk. Every gap pulls attic or crawlspace air straight into the system, which is smoke, dust, and whatever else is up there. Duct Sealing closes those leaks with proper mastic and mesh.
- Lennox Healthy Climate air cleaner cabinets leaking at the cover gasket. The cabinet seal on the Healthy Climate air cleaner assembly can develop gaps that pull attic air past the filter media rather than through it. You think you’re running filtered air but you’re not. We reseal the cabinet and clean the surrounding ductwork.
Lennox Parts & Our Repair-vs-Replace Approach
We don’t stock Lennox OEM parts and we’re not a Lennox dealer, but we do install quality parts that fit Lennox equipment properly. When a part match matters for fit, clearance, or airflow – gaskets, cabinet insulation, blower wheels – we specify Lennox OEM. For filter racks, mastic, flex duct runs, and general sealing, quality aftermarket materials last as long and cost less.
Our repair-vs-replace stance on Lennox equipment is honest and pretty simple:
- Worth cleaning and resealing when the coil and cabinet are structurally sound, even if the blower is packed, the insulation has shed, and the joints are leaking.
- Tips toward replacement when the Signature Series coil pan is rusted through, the ECM module has failed, or the cabinet has corrosion that reopens after every reseal.
We’ll give you the range for each path and let you decide. Call (877) 550-7147 for a free estimate on your Lennox system in Boulder.
Our Lennox Service Process – Step by Step
- 1
Diagnosis. We start with static pressure readings and airflow measurement on your Lennox system, then inspect the cabinet, coil, blower, and duct joints. If you’ve been told your ECM blower is failing, we check the wheel balance before agreeing.
- 2
Repair or service. Based on what we find, we pull the coil or blower if needed, clean with the appropriate equipment (Rotobrush contact-cleaning on the ducts, cell cleaning on the coil), reseal the Lennox cabinet with OEM gaskets, and address supply-side joints with mastic and mesh.
- 3
Test. We re-measure static pressure and airflow, video-inspect the supply trunk and takeoffs to confirm sealing, and run the system through its normal cycle. You see the readings before we leave.
- 4
Warranty. We document everything we did to your Lennox unit. If a component is still under manufacturer warranty, we tell you so you can confirm compliance with Lennox’s terms through an authorized dealer.
See the difference
Before
After
Before
After
Before
AfterLennox Products We Service & Install in Boulder
Our Lennox work covers the equipment Boulder homeowners actually run. On the air-handling side, that’s Lennox Signature Series air handlers and furnaces, including the SL280, EL296V, and XC21 units, plus the Merit Series ML180 and EL180 gas furnaces and the older G-series and 80% AFUE furnaces still common in mid-century Boulder ranches. On the indoor air quality side, we service Lennox Healthy Climate whole-home air cleaners and HRV/ERV units – including cabinet cleaning, resealing, and ductwork integration.
When it makes sense, we install replacement Lennox-compatible ductwork, filter racks, and air-cleaner cabinets as part of a repair or upgrade. All Lennox work is scoped per job, with a written estimate before anything starts.
We Also Service These Brands
Lennox isn’t the only brand we work on. We also clean and repair ductwork connected to Trane and Carrier systems, along with other major manufacturers. If your home has a mix of brands – a Lennox air handler feeding Carrier ductwork, or the reverse – that’s not a problem. Our tools and process work the same regardless of the label on the cabinet.
FAQs – Lennox Air Duct Cleaning Service in Boulder
No. We’re an independent service provider, not a Lennox dealer and not authorized by Lennox. We service and repair Lennox equipment using quality parts that fit it, and we tell you clearly when a component is still under the manufacturer’s warranty so you can handle compliance through an authorized dealer.
Yes. We use Lennox OEM gaskets, cabinet insulation, and blower wheels when fit and airflow depend on them, and quality aftermarket filter racks, mastic, and flex duct everywhere else. We don’t stock OEM parts and we don’t claim to be a dealer, but the parts we install are the right ones for your unit.
A full Lennox air-handler and duct service usually takes most of a scheduled visit once we’ve inspected the system safely. Cabinet resealing, coil cleaning, and supply duct sealing on a Signature Series air handler adds time compared to a bare duct cleaning, because the cabinet has to come apart and go back together correctly. We’ll give you a realistic window when we quote the job.
Lennox Signature Series air handlers and furnaces (SL280, EL296V, XC21), Merit Series gas furnaces (ML180, EL180), G-series and older 80% AFUE furnaces, and Lennox Healthy Climate whole-home air cleaners and HRV/ERV units. If you’re not sure what you have, we can identify it on the visit.
Proper cleaning and repair by a qualified technician shouldn’t void a Lennox warranty, but the terms are set by Lennox and the authorized dealer network. We don’t disturb factory-installed components beyond what the service requires, and we document everything. If something is under warranty, we tell you so you can confirm with an authorized Lennox dealer before we proceed.
Lennox air handler and duct cleaning in Boulder is scoped per job by written estimate, because Signature Series cabinet work, coil cleaning, and supply duct sealing cost more than a basic duct cleaning on older systems. We give one flat price per system agreed before work starts, no per-vent pricing, and we show you before-and-after photos of your own ducts. Call (877) 550-7147 for an exact quote – estimates are free.
Check the cabinet insulation and the condensate pan before blaming the ducts. On Signature Series air handlers, degrading foil-faced insulation inside the cabinet and a sludge-loaded coil pan are the usual sources of a musty smell that returns weeks after a filter change. Both require pulling the cabinet panels and cleaning the interior, not just running a brush through the ducts. Call (877) 550-7147 for a free estimate.
A matted A-coil or a leaking return plenum is almost always the cause. Merit furnaces mount the coil in a tight cabinet, so fin matting and condensate-pan sludge restrict airflow even when the ducts are spotless. Static pressure climbs, the blower works harder, and you feel weak airflow at the registers. The fix is coil cleaning and resealing the return plenum, not another duct cleaning. Call (877) 550-7147 for a free estimate.
Yes. Low-humidity winters in Boulder crack mastic at plenum takeoffs and peel foil tape from cabinet joints. The dry air also degrades foil-faced insulation inside Signature Series air handlers faster than in humid climates. Duct sealing on a Lennox system here should use mastic and mesh rated for dry conditions, and cabinet insulation should be inspected on every service visit.
Yes, when the wheel is pulled or protected properly. The ECM module itself doesn’t need to be disturbed – the wheel comes off the shaft and gets cleaned separately, then rebalanced before reinstallation. A packed wheel that vibrates is often mistaken for a failing ECM module; cleaning the wheel usually resolves the symptom without replacing the motor.
Look for dust streaks on the cabinet, a filter that loads unevenly, or musty odor that returns quickly after a filter change. The cover gasket on the Healthy Climate assembly can develop gaps that let attic or crawlspace air bypass the filter media. We reseal the cabinet and video-inspect the surrounding ductwork to confirm the fix. Call (877) 550-7147 for a free estimate.
Here’s how this kind of job usually goes. A homeowner with a Lennox Signature Series air handler calls about dusty supply registers and a musty smell that comes back weeks after every filter change. The cabinet insulation is shedding and the blower wheel is coated with lint. A qualified technician pulls the blower and coil for cleaning, reseals the cabinet with OEM gaskets, then video-inspects and seals the supply trunk and takeoffs. On Merit furnaces, the same sequence plays out around a matted A-coil and a leaking return plenum – the ducts were never the real problem.
Boulder’s air duct work here is driven by wildfire smoke more than routine dust. When Front Range fire events push particulate into return ducts, mid-century ranches south and east of downtown – where flexible duct runs connect near attic and crawlspace vents – take the load directly. Cleaning and resealing returns after a smoke event does more for indoor air than a spring dust pass ever will.
Book Your Lennox Service in Boulder, CO
If you own a Lennox system and want duct work scoped around how that equipment actually behaves, call Boulder Duct Cleaning at (877) 550-7147 for a free estimate. We’ll diagnose the cabinet, coil, blower, and ducts together, quote one flat price per system before work starts, and show you before-and-after photos of your own ducts. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Written by the team at Boulder Duct Cleaning.