Whole-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.
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Before
AfterWhy Aurora Homeowners Choose Lennox Air Duct Cleaning
CleanRun Air Duct Cleaning Aurora provides independent Air Duct Cleaning services, repair, and sealing for Lennox systems across Aurora, CO. We work on Lennox Merit, Elite, and Dave Lennox Signature Collection systems with equipment calibrated to their cabinet geometry and coil configurations, and every job starts with a written price before any panel comes off. Call (720) 513-5159 for a free estimate.
We’ve provided Lennox service in Aurora since 2013, from the older Merit Series 10ACX and 13ACX units common in Meadowood ranch homes to the variable-speed Elite XC21 and Signature SL25XPV systems in newer builds along the E-470 corridor. We’re not affiliated with Lennox, and that’s the point. Our independent status means we diagnose what your ducts and air handler actually need, without any sales quota tied to manufacturer-branded replacements. Tomas Reyes, our owner and lead technician, learned the mechanical trades at Bronx Community College and has run CleanRun’s Aurora territory for several years now. He’s seen Lennox systems in everything from 1950s Hoffman Heights gravity-furnace conversions to tract homes in Sable Ridge where the original fiberglass-lined ductwork is now brittle from Colorado’s dry climate.
Aurora’s exposure on the semi-arid High Plains means our prevailing southwest winds drive fine prairie dust into homes faster than in more sheltered parts of the metro. That dust loads Lennox return systems heavily, especially the pancake coil designs in Merit Series air handlers where debris mats against the slab face. Our process is straightforward: we show you the photo first, then we talk about what comes next.
Why Trust CleanRun Air Duct Cleaning Aurora for Your Lennox Air Duct Cleaning?
We know Lennox cabinet geometry cold. The Merit Series 10ACX and 13ACX units have compact, upright cabinets with the evaporator coil mounted flat against the airflow path, a configuration Lennox calls the pancake design. That flat slab catches everything. In Aurora’s dust-heavy environment, we’ve pulled pancake coils that look like felted wool from years of accumulated debris. The Elite XC16 and XC21, and the Signature SL18XC1 and SL25XPV, use deeper A-coil or N-coil arrangements with variable-speed ECM blowers that pull higher static pressure when filters are neglected. We clean those assemblies with rotary brushes and negative-pressure extraction, not shop-vac noise.
Tomas Reyes developed his method providing Lennox service in Denver and across the metro area before focusing on Aurora. His approach is specific: negative-pressure vacuum system, rotary brush, describe exactly what came out of the plenum, quote a flat price in writing before any equipment leaves the truck. Every CleanRun technician is background-checked and uniformed under Haven Standard Clause 3: Verified Crews. We use professional-grade equipment from Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman, and we name those brands so you can look them up before agreeing to a price.
Our 365-Day Done Right Promise is backed in writing on every job, not just stated in marketing copy. If the work isn’t right, we make it right. And every visit concludes with a Documented Photo Record of every duct run, delivered to you as part of the standard job record. We’ve held that practice since our first job in 2013.
Common Lennox Air Duct Cleaning Problems We Fix in Aurora
- Merit Series pancake coil lint matting. The 10ACX, 13ACX, and ML14XC1 air handlers use a flat coil slab mounted perpendicular to airflow. In Aurora’s high-dust environment, that surface traps lint and pet hair into a dense mat that restricts airflow and drops coil temperature until ice forms. We’ve found these coils almost fully blocked in homes near the Aurora Hills Golf Course where the original 1970s-1980s Lennox units are still running. Cleaning the coil slab and the return plenum upstream fixes the freeze cycle without touching the refrigerant loop.
- Elite and Signature ECM blower motor over-amp failures. The constant-torque and full ECM motors in XC16, XC21, SL18XC1, and SL25XPV systems are sensitive to static pressure. When the blower wheel loads with dust or the return filter is neglected, these motors draw higher amperage to maintain RPM. Over time that burns the motor or throws error codes on the control board. We pull and clean the blower wheel, measure static pressure before and after, and document the amp draw change in the job record.
- Slip-joint separation in Lennox metal trunk systems. Lennox installations in Aurora’s 1970s-1990s tract homes often used sheet-metal trunks with slip-joint connections at elbows and offsets. Colorado’s temperature swings and the settling common in Meadowood and Sable Ridge ranch homes cause these joints to separate, leaking conditioned air into attics or crawlspaces. We find these with blower-door assisted pressure testing, then seal with mastic and fiberglass mesh, not tape that will dry and fail.
- Flex duct tears at the air handler collar. The flex duct runs on many Lennox installations sag from their own weight where they connect to the air handler cabinet, especially in tight utility closets common in Aurora split-levels. That sag creates a tear or gap at the collar, causing return-side bypass. Unfiltered attic air gets pulled straight into the blower. We replace the damaged flex section, support it with proper strapping, and seal the collar with code-compliant mastic under Haven Standard Clause 1.
- Evaporator coil corrosion from alkaline dust. Aurora’s fine prairie dust is alkaline, and when it combines with condensation on the coil slab, it accelerates corrosion of the copper tubing. We’ve found pinhole leaks in 12-year-old Merit coils that started with dust accumulation the owner never saw because the coil is buried in the cabinet. Cleaning doesn’t fix corrosion, but it prevents it. We photograph the coil condition and tell you straight whether cleaning is enough or the coil is too far gone.
BeforeAfterLennox Parts & Our Repair-vs-Replace Approach
We stock OEM-equivalent filter media and gaskets sized to Lennox cabinet dimensions, and we carry quality aftermarket flex duct, collars, and mastic for repairs where Lennox-branded parts are unavailable or priced beyond reason. For a 15-year-old Merit Series unit with a corroded coil or a locked-rotor blower motor, repair often doesn’t pencil out against replacement. We tell you that straight. But we’ve also cleaned and sealed 20-year-old Lennox systems that just needed the blower wheel pulled, the pancake coil brushed, and three trunk joints resealed to run another five years, including jobs requiring Lennox Air Duct Cleaning in Centennial, CO. The decision is yours, and the price is in writing before any work starts.
Our local inventory includes common Lennox blower belts, filter grilles, and plenum adapters for fast turnaround on Aurora jobs. If we need to order a Lennox-specific part, we tell you the lead time and the exact cost before proceeding. Call (720) 513-5159 and we’ll put a written number next to any competitor’s quote under our Free Second Opinion.
Our Lennox Service Process - Step by Step
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Diagnosis with documentation. We remove the blower compartment panel and inspect the coil slab, blower wheel, and return plenum with a borescope camera. Every image is saved to your job record. For Lennox variable-speed systems, we record static pressure and blower amp draw before touching anything.
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Written scope and price. Haven Standard Clause 1: written price delivered before any work starts. We list exactly what we’ll clean, what we’ll seal, what parts we’ll replace, and what the total is. No per-vent pricing, no add-ons after the truck is parked.
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Cleaning and repair. We use Rotobrush rotary brushes with negative-pressure extraction from Nikro or Abatement Technologies HEPA vacuums. For Lennox pancake coils, we hand-brush the slab face before rotary cleaning to avoid pushing debris into the fins. Blower wheels are removed and cleaned outside the cabinet. Flex duct and metal joints are sealed with mastic, not tape.
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Testing and verification. We measure static pressure after cleaning and compare to the pre-service reading. On Lennox ECM systems, we verify the blower amp draw has dropped to manufacturer specification. The system runs through a full heat and cool cycle before we leave.
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Deliverables and warranty. You receive the Documented Photo Record of every duct run and component, the written scope, and the 365-Day Done Right Promise in writing. If it’s not right, we make it right.
Lennox Products We Service & Install in Aurora
We service and clean Lennox Merit Series air conditioners and heat pumps (10ACX, 13ACX, ML14XC1), Elite Series systems (XC13, XC16, XC21), and Dave Lennox Signature Collection equipment (SL18XC1, SL25XPV). Our gas furnace coverage includes the ML180, EL296V, and SL280V lines. We stock filters, gaskets, and plenum components matched to these cabinet dimensions, and our rotary brush heads are sized for Lennox’s narrower blower compartments. For evaporator coil cleaning, blower cleaning, and air leak repair on any of these systems, we carry the tooling to do the work without a return trip.
We Also Service These Brands
We’re not a single-brand shop. CleanRun technicians are equally familiar with Trane’s spine-fin coil geometry and Carrier’s Infinity series control protocols. Our equipment roster, including Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman, works across all major residential HVAC brands. The diagnostic process and documentation standards are identical whether we’re cleaning a Lennox Elite or a Trane XV20i.
FAQs - Lennox Air Duct Cleaning Service in Aurora
No. We are an independent Lennox service provider, not affiliated with or authorized by Lennox International. Our technicians are trained on Lennox cabinet geometry, coil configurations, and common failure modes through field experience across the Denver metro, not through manufacturer certification. This independent status means our recommendations are based on what your system actually needs, not on any sales quota or brand-mandated part replacement program.
We use OEM-equivalent filter media and gaskets when they match Lennox cabinet dimensions exactly. For flex duct, mastic, and other repair materials where Lennox does not manufacture a proprietary part, we use quality aftermarket products that meet or exceed code requirements. If a genuine Lennox part is specifically required for your repair, we source it and show you the part number and cost in writing before ordering.
A standard Lennox air duct cleaning and evaporator coil service takes 3-5 hours in a typical Aurora tract home. Older homes in Hoffman Heights or Meadowood with gravity-furnace conversions and hand-fabricated trunk lines can take longer, especially if we find separated slip joints or damaged flex runs that need repair. We quote the time estimate in writing with the price, and we don’t charge by the hour. Call (720) 513-5159 for a specific estimate based on your home and system.
We service all residential Lennox lines: Merit Series (10ACX, 13ACX, ML14XC1), Elite Series (XC13, XC16, XC21), Dave Lennox Signature Collection (SL18XC1, SL25XPV), and gas furnaces including ML180, EL296V, and SL280V. We also clean and repair the ductwork and air handlers connected to these systems, regardless of age.
No. Proper cleaning of the evaporator coil and blower assembly by a qualified technician does not void Lennox equipment warranties. We use non-corrosive, manufacturer-compatible cleaning methods and document the work with before-and-after photos. What can void a warranty is using improper chemicals, damaging fins with excessive pressure, or allowing untrained personnel to work on sealed refrigerant components. We don’t touch the refrigerant loop unless we’re EPA-certified and you’ve authorized that specific work in writing.
The musty smell during cooling is almost always microbial growth on the evaporator coil or in the condensate pan, which only gets wet when the AC is running. In Aurora’s dry climate, the coil dries out quickly when the system switches to heat, killing the odor temporarily. The heat cycle also runs the blower at higher temperatures, which can volatilize different compounds. We pull the blower, brush and vacuum the coil slab, clean the condensate drain and pan, and treat the plenum with a sanitizer if indicated. After that, the smell either stops or we know to look deeper. Call (720) 513-5159 and we’ll put a written price on the exact scope before starting.
Often yes. The pancake coil in Merit Series units (10ACX, 13ACX, ML14XC1) freezes when airflow is restricted by lint and dust matting on the slab face. Cleaning the coil and the upstream return plenum restores airflow and stops the freeze cycle without touching the refrigerant. If the coil is corroded through, cleaning won’t fix it, and we’ll show you the photo and tell you straight. Call (720) 513-5159 for a free inspection.
Yes, because of the variable-speed ECM blowers. These motors maintain precise RPM by increasing torque when static pressure rises. A dirty blower wheel or clogged return raises that pressure, causing the motor to over-amp and eventually fail. We measure static pressure and amp draw before and after cleaning on every Elite and Signature system, and we document the improvement in your job record. Basic furnaces with standard PSC motors are more forgiving of neglect, but the ductwork still needs the same thorough cleaning.
Usually. We cut out the damaged flex section, install a new collar and flex duct of matching diameter, support it properly to prevent future sagging, and seal with mastic. We only replace the full trunk line if we find multiple failures or if the original installation used undersized duct that can’t handle the system’s designed airflow. The scope and price are in writing before we start.
Book Your Lennox Service in Aurora, CO
Call (720) 513-5159 to speak with a live person and schedule your free estimate. We’ll ask about your Lennox model if you know it, the age of your system, and any symptoms you’ve noticed. Every estimate includes a written price before work starts, a Documented Photo Record of every duct run, and the 365-Day Done Right Promise in writing. Haven Standard Clause 1: no exceptions.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Aurora since 2013.