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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AfterLennox Air Duct Cleaning in Denver, CO | CleanRun Air Duct Cleaning Denver
Air Duct Cleaning in Denver for Lennox systems runs $380-$680 for a complete forced-air system, with most jobs finished in a single visit. We are independent Lennox service specialists - not manufacturer-authorized - and we work on these systems across Denver every week. The one thing that makes our Lennox work here different is altitude: at 5,280 feet, your blower runs longer cycles than the same furnace would at sea level, pulling debris deeper and faster into the return drop. Call (720) 799-2292 for a written estimate before any work starts.
Why Denver Residents Choose Us for Lennox Service
We have mapped the duct layouts Lennox uses across Denver’s housing stock, from the Signature SLP98V communicating systems in newer Stapleton builds to the Merit ML195 furnaces still heating 1960s ranches in Harvey Park and Mar Lee. Our crews stock Lennox-specific blower modules, control boards, and communicating sensors alongside quality aftermarket equivalents for commodity parts like filter racks and flex duct.
Tomas Reyes, our owner, grew up in Queens and learned the trade at Manhattan’s Apex Technical School before doing ductwork across the Northeast. He and our crew have been servicing Denver homes for over a decade, including jobs in Capitol Hill where original galvanized duct runs and older furnace systems keep the work honest. Tomas still photographs every register, plenum, and main trunk line before and after. Here is what the camera found. Here is what it costs to fix it. You decide.
Every job follows Lennox sales & service protocols we have developed for this market: written price before work starts, documented photo record of every duct run, and the 365-Day Done Right Promise backed in writing. Our technicians are background-checked and uniformed under Haven Standard Clause 3: Verified Crews.
Common Lennox Air Duct Cleaning Problems We Solve in Denver
- Variable-speed blower motors pulling debris deep into returns. Lennox constant-torque and fully communicating ECMs in Denver run extended cycles to hit CFM targets at 5,280 feet. That continuous airflow draws fine prairie soil and wildfire ash past the filter and into the return drop, coating the blower wheel and evaporator coil. We clean the full air-handler cabinet, not just the visible duct trunk.
- Cabinet and plenum gasket shrinkage from low humidity. Denver’s ~40% annual relative humidity dries out the foil-faced insulation and gaskets on Signature and Elite air handlers. Seams open. Dust and Marshall Fire smoke particulates bypass the filter entirely. We inspect these seams with a borescope and reseal with proper mastic where the original adhesive has failed.
- Heat exchanger dust buildup masking inspection. Lennox Merit and Elite tubular and clamshell heat exchangers collect dust on exterior fins when return ducts are dirty. That buildup insulates the metal, drives longer cycles, and hides cracks or hot spots during combustion analysis. We clean the return system first so the furnace inspection that follows is actually readable.
- Communicating systems running reduced capacity due to duct issues. Lennox iComfort-enabled SLP98V and similar units paired with old, leaky, or collapsed ductwork often drop into dehumidification or reduced-capacity modes. Homeowners blame the control board. Usually it is a collapsed flex run or liner-shedding section killing airflow. We find the real problem with static pressure testing and video inspection.
- Gravity-furnace octopus trunks creating dead-end debris zones. Capitol Hill and Congress Park homes with 1960s forced-air conversions kept the original octopus trunk lines. Horizontal dead-end runs collect decades of compacted debris and, occasionally, rodent nesting material. Our Rotobrush and Nikro negative-pressure extraction systems clear these sections without damaging the original sheet metal.
BeforeAfterLennox Service in Denver: What Local Conditions Mean for Your Equipment
Because Denver sits at 5,280 feet, Lennox furnaces with variable-speed blowers must move the same cubic feet of air at lower air density, so they run longer cycles than the identical model would at sea level - meaning Denver Lennox owners accumulate duct debris on a faster clock than the manufacturer’s maintenance interval assumes. The Front Range’s intensifying wildfire seasons compound this. The December 2021 Marshall Fire destroyed neighborhoods in Louisville and Superior just 20 miles from downtown Denver, and since then metro residents seal windows and run HVAC continuously during smoke events. Fine ash embeds in duct liner and cracks in flexible duct insulation, then circulates for months after the smoke clears. In Harvey Park, our crew pulled the return drop on a 1968 ranch running a Lennox Merit ML195 furnace and found the original sheet-metal trunk joined with aged mastic that had cracked, allowing fine ash to penetrate. We also offer our Dryer Vent Cleaning in Denver for homes needing full ventilation maintenance after smoke exposure.ad to be tested before we disturbed it, then video-inspected a 14-foot dead-end run packed with 50 years of compacted prairie dust and insulation crumbs. Once the run was cleared and the evaporator coil on the Lennox cased coil was cleaned, the variable-speed blower settled into a noticeably shorter cycle and the homeowner’s static pressure dropped enough that the furnace no longer ran continuously on mild days.
Lennox Models & Products We Service in Denver
We service the full Lennox residential line in Denver service area homes: Signature Series variable-speed furnaces (SL280V, SL297V) and EL296V/EL18XPV heat pumps; Elite Series furnaces (EL180, EL195, EL296) and XC/XP condenser lines; Merit Series workhorses (ML180, ML195, ML296) and 13ACX/14ACX air conditioners; and Dave Lennox Signature Collection communicating systems including iComfort-enabled SLP98V units.
For proprietary components - blower modules, control boards, communicating sensors, heat exchanger assemblies - we source Lennox OEM parts. For commodity items like filter racks, foil tape, mastic, and flex duct, we use quality aftermarket equivalents. Our trucks stock the common blower modules and gasket kits for Denver’s most prevalent installs, so most jobs do not wait on parts.
Lennox Service Pricing in Denver
Whole-system Lennox air duct cleaning in Denver runs $380-$680 for a typical single-furnace home. The price depends on duct run count, accessibility, and whether we are also cleaning the evaporator coil and blower assembly. Return-duct-only cleaning starts around $220. We do not price per vent. One flat price per system, agreed in writing before work starts, under Haven Standard Clause 1.
Every estimate includes video inspection of the main trunk and return drop, static pressure reading at the air handler, and a written scope with line-item pricing. The documented photo record of every duct run is included as standard - not an upsell. Call (720) 799-2292 for an exact quote; estimates are free.
Serving Denver, CO - Our Local Coverage Area
We’re based in the Denver area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Lennox Air Duct Cleaning in Denver
It often is, especially in Denver. Extended run times in Lennox variable-speed systems frequently trace to restricted airflow from dirty returns or collapsed duct runs. At altitude, the blower already works harder to move the same air volume; add debris and it runs continuously without ever satisfying the thermostat. We measure static pressure and inspect with a borescope to separate a duct issue from an equipment problem. Call (720) 799-2292 for a free diagnostic estimate.
No. Duct cleaning does not void Lennox equipment warranties, provided the work is done without damaging components. We are independent specialists, not Lennox-authorized, and we document every step so any warranty claim you file later has a clear service history. Our photo record shows exactly what was touched and when.
Yes, with proper assessment first. Harvey Park and similar west-side neighborhoods have ranch homes where original sheet-metal ductwork was sealed with asbestos-containing mastic or duct tape. We test before we disturb. Our negative-pressure extraction with Rotobrush and Nikro equipment cleans without the aggressive mechanical agitation that could damage aged joints. The Lennox forced-air system itself is not the risk factor; the duct condition is.
Yes. Standard 1-inch pleated filters capture particles down to roughly 3-10 microns. Wildfire smoke contains particulates below 2.5 microns that pass straight through and embed in duct liner, flexible insulation, and evaporator coil fins. Changing the filter does not remove what already settled. We have found ash deposits in returns six months after smoke events cleared. Call (720) 799-2292 if your system ran during any Front Range smoke event.
They do. Those octopus trunk lines - large uninsulated sheet-metal mains retrofitted for forced air - create dead-end sections where debris compacts for decades. Standard duct cleaning equipment designed for modern trunk-and-branch systems often misses these zones. We video-inspect first, then use specialized brushes and extended hose runs to reach horizontal dead ends. The Lennox blower and control system are modern; the ductwork it is connected to is not. The cleaning protocol has to account for both.
Service Areas Near Denver
We run Lennox service in Englewood and Lennox service in Greenwood Village from our Denver base, with regular routes through Thornton, Aurora, and Centennial. The same crew, same equipment roster - Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman - and same written-price guarantee apply across the metro.
Book Your Lennox Service in Denver Today
Call (720) 799-2292 to schedule your Lennox system evaluation. A live person answers, and we will put a written estimate in your hands before any work starts. Every job includes the documented photo record and the 365-Day Done Right Promise. Tomas Reyes and our crew are ready when you are.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Denver, serving Denver since 2013.