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.
Lennox Air Duct Cleaning in Katy, TX | CleanRun Air Duct Cleaning Katy
We provide independent Air Duct Cleaning in Katy and repair across Katy, TX, with one distinction that matters here: we specialize in the hidden damage that Katy’s post-Harvey remediation left inside Lennox flex duct systems. Our crews document every duct run with video inspection before touching a register, and we quote one flat price per system in writing before any work begins. Call (346) 666-7165 for a free estimate.
Why Katy Residents Choose Us for Lennox Service
Tomas Reyes, our owner, started in this trade at Bronx Community College and spent the better part of two decades running cleaning jobs across the Houston metro. He’ll tell you the ductwork in a Katy ranch-style home near LaCenterra at Cinco Ranch reveals more about that house’s real history than the seller’s disclosure ever will. That’s why he built CleanRun around a single habit: pull the camera out first, let the homeowner see what’s actually inside, then talk about what needs to happen.
We’re not a Lennox-authorized dealer. We’re independent Lennox service specialists with deep familiarity of the brand’s air handler and variable-speed system families, and we stock OEM-equivalent flexible duct, mastic, and insulation rated for Katy’s 130°F+ attic conditions. Every job runs under the H.A.V.E.N. Standard, with background-checked, uniformed technicians identified by name before arrival. Our Lennox sales & service page details our full brand coverage.
The before photo does the talking. Everything after that is just paperwork.
Common Lennox Air Duct Cleaning Problems We Solve in Katy

- Merit Series flex duct connections failing at the air handler. The 130°F+ attic temperatures in Katy master-planned communities like Cinco Ranch and Grand Lakes cook the adhesive and mastic at Lennox Merit Series air handler connections. We find supply leaks that pull humid attic air directly into the airstream, spiking indoor humidity and loading the evaporator coil with extra condensation.
- Variable-speed air handler condensate pan contamination. Lennox Elite Series and Dave Lennox Signature Collection units running nine-plus months a year in Katy’s 85-90% humidity develop microbial growth in condensate pans. That growth migrates into downstream ductwork, especially where flex duct sags create standing water traps.
- Sagging flex runs trapping debris and mold. Builder-grade Lennox systems in 1990s-2010s tract homes across Firethorne and Cross Creek Ranch were installed with long flex duct spans across superheated attics. The sagging low points collect pollen, dust, and condensation, then colonize mold in the exact spots where airflow stalls.
- Post-Harvey hidden contamination in “remediated” homes. In neighborhoods near the Barker and Addicks reservoir flood pools, we regularly open rebuilt ceilings to find Lennox flex duct joints that were walled over after 2017 surface cleaning. Video inspection shows black mold staining and prairie sediment still trapped inside supply runs that homeowners were told were handled.
- Evaporator coil loading from extreme pollen cycles. Katy’s Bermuda grass and ragweed loads off the prairie cycle enormous volumes of particulate through Lennox systems. The coil fins clog faster here than in drier Texas markets, reducing airflow and forcing the duct system to work harder at lower efficiency.
Before
AfterLennox Service in Katy: What Local Conditions Mean for Your Equipment
Katy sits on the hyper-humid Katy Prairie, and that flat Gulf coastal plain location creates a set of conditions you won’t find in Sugar Land or Cypress. Relative humidity routinely exceeds 85-90%, attic temperatures spike above 130-140°F in summer, and residential AC systems run nine or more months a year. The temperature differential across duct walls is severe, and condensation inside flex duct runs is endemic. In Canyon Lakes West, we opened a rebuilt ceiling to access a Lennox Merit Series air handler whose flex duct joints had been walled over after Harvey. Video inspection revealed black mold staining and prairie sediment trapped in the first 15 feet of supply run, so we removed and replaced the contaminated flex sections, applied mastic sealant at every joint, and cleaned the evaporator coil before sealing the access panel. The homeowner noticed immediate relief from musty odors that had persisted for years. That scenario repeats across Bear Creek Village and other post-Harvey neighborhoods where drywall was replaced but ductwork was never pressure-tested or video-inspected. For Lennox owners, this means a system that looks fine from the register can be circulating contaminated air through original flex duct hidden behind new ceiling texture.
Lennox Models & Products We Service in Katy

We work on the full Lennox residential lineup found in Katy’s housing stock:
- Merit Series: Builder-grade single-stage systems common in 2000s Katy tract homes, where flex duct connections at the air handler are our most frequent repair.
- Elite Series: Upgraded variable-speed units installed in Cinco Ranch and Grand Lakes, with condensate pan and coil cleaning needs specific to high-humidity operation.
- Dave Lennox Signature Collection: High-end communicating systems in newer Cross Creek Ranch builds, requiring careful pressure-balancing after duct modifications.
- CompleteHeat: Older hybrid systems still present in some 1990s Firethorne homes, where integrated ductwork often shows age-related sagging and insulation breakdown.
We use OEM-equivalent flexible duct, mastic, and insulation that meet or exceed Lennox specifications for Katy’s climate. Off-brand materials fail prematurely here, so we don’t stock them. When Lennox flex duct shows pervasive contamination or structural failure, we recommend targeted section replacement rather than full-system replacement if the air handler and trunk lines are sound. Our equipment roster includes Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman, all professional-grade tools you can verify independently.
Lennox Service Pricing in Katy
Lennox air duct cleaning in Katy typically runs $380-$680 for a complete single-system cleaning, including video inspection of every duct run, before-and-after photo documentation, and evaporator coil access cleaning. Lennox flex duct repair or section replacement adds $180-$420 per run depending on length, attic accessibility, and whether the connection requires air handler disassembly. Whole-home Lennox duct sealing with mastic and OEM-equivalent insulation averages $1,200-$2,400 for the sprawling single-story layouts common in Katy’s master-planned communities.
What drives cost: attic temperature conditions that limit safe work windows, the length of flex duct runs in large ranch-style homes, and whether post-Harvey remediation left access panels that need reopening. Every estimate includes a written scope and flat price before any work begins, per Haven Standard Clause 1. Call (346) 666-7165 for an exact quote - estimates are free.
Serving Katy, TX - Our Local Coverage Area

We’re based in the Katy 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 Katy
Yes, if the remediation did not include video inspection and pressure testing of the flex duct interior. Surface-level cleaning of registers and visible trunk lines leaves the hidden supply runs untouched. We find mold staining and sediment in “remediated” Lennox systems regularly. Call (346) 666-7165 for a video inspection - estimates are free.
Katy’s 85-90% relative humidity and 130°F+ attic temperatures create constant condensation inside flex duct walls, especially at sagging low points. That moisture feeds mold growth and degrades the inner liner. Lennox systems here work harder and longer than in drier markets, accelerating the cycle. Call (346) 666-7165 for a video inspection - estimates are free.
Yes, evaporator coil cleaning is included in our standard Lennox duct cleaning scope. We access the coil through the air handler cabinet, document its condition with photos, and clean the fins and drain pan. Coil condition directly affects duct airflow and humidity control. Call (346) 666-7165 to schedule - estimates are free.
Sagging flex duct traps condensation and debris at the low point, creating a mold colonization site. We support the run with proper strapping, replace sections where the inner liner has degraded, and seal all connections with mastic rated for Katy’s attic heat. Targeted repair is usually sufficient if the air handler and trunk lines are sound.
Yes, we cover both communities as part of our Katy service area. Grand Lakes has a concentration of Lennox Elite Series variable-speed units from the 2000s; Firethorne includes older CompleteHeat systems and 1990s flex duct that is now reaching end of service life. Both present distinct inspection priorities.
Service Areas Near Katy

Our crews work throughout Fort Bend and west Harris County, including Lennox service in Cinco Ranch, Lennox service in Brookshire, Mission Bend, Pecan Grove, and Four Corners. Each area carries its own Lennox installation patterns and local climate factors, from the newer Signature Collection builds in Cross Creek Ranch to the aging Merit Series systems in older Brookshire subdivisions.
Book Your Lennox Service in Katy Today
Call (346) 666-7165 to schedule your Lennox duct inspection. A live person answers every call, and we’ll send a written estimate with a flat price before any work begins. Every job includes video inspection, before-and-after photo documentation of every duct run, and our 365-Day Done Right Promise in writing.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Katy since 2013.




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