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 Cumming, GA | CleanRun Air Duct Cleaning Cumming
Air Duct Cleaning - Cumming for Lennox systems typically runs $380-$680 for a whole-system cleaning on a standard 2,500-3,500 sq ft home, with duct sealing adding $200-$450 depending on how many boot connections need mastic work. We’re an independent Cumming air duct company, not a Lennox-authorized dealer, and we’ve cleaned and sealed thousands of Lennox systems across Forsyth County’s 2000-2015 subdivision housing. Our crews know the slab-coil layouts, cabinet transitions, and return-drop configurations common in this market. Call (678) 693-5322 for a written estimate before any work starts.
Why Cumming Residents Choose Us for Lennox Service
We’ve been running jobs in Cumming since 2013, and the Lennox systems we see most often are the same ones installed during Forsyth County’s subdivision boom: Merit Series air handlers tucked into attic platforms above two-story homes in Windermere, Elite Series two-stage units in upgraded builds along the SR-400 corridor, and the occasional Dave Lennox Signature Collection system in a Lake Lanier custom home. Tomas Reyes, our owner, grew up in the Bronx and picked up his HVAC fundamentals at Bronx Community College before spending the better part of two decades working through every configuration of residential ductwork imaginable. He and our crew have handled plenty of calls in the Vickery subdivision, where the two-story layouts tend to hide a surprising amount of debris in the return-air trunk lines.
We don’t guess at what’s inside your ducts. Every job starts with a video inspection, and we deliver a Documented Photo Record of every duct run before and after cleaning. The camera doesn’t have an opinion - it just shows you what’s in there. Our written price comes before any panel comes off, under Haven Standard Clause 1. We stock genuine Lennox sales & service OEM parts for control boards, blower motors, and coil components, and we use quality aftermarket mastic, foil tape, and insulated flex for duct sealing where OEM isn’t the correct category. If your Lennox air handler is 15+ years old with a compromised coil and rusted cabinet, we’ll tell you the honest math rather than bundling repairs into a system that’s past its economic life.
Common Lennox Air Duct Cleaning Problems We Solve in Cumming

- Compacted construction debris in Merit Series plenums. At a Windermere two-story with a 2006 Lennox Merit Series air handler in the attic, we pulled the hallway register and found the original red Georgia clay and drywall dust still compacted at the bottom of the plenum from the 2006 build. Our crew ran video inspection through the trunk, mastic-sealed three loose boot connections and the cabinet-to-plenum joint, then HEPA-cleaned the full supply and return before treating the coil.
- Cabinet air leaks pulling humid attic air into supply streams. Lennox Merit Series air handlers sit in garages and attic platforms where soft caps and blower door fasteners were often not torqued properly during original install. Those gaps let humid, hot attic air mix into supply air during April-October runtime. We smoke-test every cabinet seam and re-torque or reseal as needed.
- Mold and mildew on slab coils from Lake Lanier humidity. The evaporative effect of Lake Lanier creates localized higher humidity in lakeside subdivisions. A Lennox air handler with even a small cabinet-seam gap pulls damp attic air into the return drop, keeping coil surfaces wet enough to support growth. This pattern shows up consistently in lakeside Cumming homes and rarely in inland Forsyth neighborhoods a few miles north.
- Kinked flex returns restricting airflow. Builder-grade installations in 2000-2015 Cumming subdivisions used short, tight flex return drops that sag or kink over time. The restriction starves the blower, raises static pressure, and reduces the effectiveness of any cleaning until the duct geometry is corrected.
- Failed zone dampers starving one zone and causing flex duct to sag. Multi-zone Lennox systems in larger Windermere-area homes often have a failed or improperly set damper that leaves one zone underfed. The unrelieved pressure causes flex duct to sag and blow conditioned air into the attic. We identify this during video inspection before cleaning begins.
Before
AfterLennox Service in Cumming: What Local Conditions Mean for Your Equipment
In Cumming’s lakeside subdivisions along Lake Lanier’s shoreline and coves, the evaporative effect keeps attic dewpoints high enough that a Lennox air handler with even a small cabinet-seam gap will pull damp attic air into the return drop. Our first step on lakeside Lennox jobs is smoke-testing the cabinet and plenum before any cleaning, not just running a vacuum. The same test in inland Forsyth neighborhoods a few miles north consistently shows dry ducts. This isn’t a theory - it’s a pattern we’ve documented across hundreds of Cumming jobs. The humidity differential means lakeside Lennox owners need cabinet-sealing verification as a standard part of duct cleaning, not an upsell. When we find wet duct lining, we treat the coil and trunk with an EPA-registered sanitizer after HEPA extraction, then re-test with the smoke pencil to confirm the seal holds under negative pressure. Homeowners in these areas who skip the cabinet test often call us back within two seasons with recurring mildew odor. The ones who let us seal first don’t.
Lennox Models & Products We Service in Cumming

We clean and seal the full range of Lennox residential equipment found in Cumming homes. The Merit Series (13ACX/14ACX) builder-grade condensers and matching air handlers dominate the 2000-2015 subdivision stock in Windermere and along the SR-400 corridor. The Elite Series (XC14/XC16) two-stage systems appear in upgraded subdivision builds with multi-zone ductwork. The Dave Lennox Signature Collection (XC21/XC25) units sit in larger Lake Lanier-area custom homes with more complex trunk-and-branch layouts. We still encounter CompleteHeat and older Pulse furnace/air-handler combos in late-1990s Cumming homes, where the cabinet dimensions and coil access differ from current designs.
For any control board, blower motor, or coil component replacement, we source genuine Lennox OEM parts so the system’s ratings and warranty path stay intact. For duct sealing and flex replacement, we use quality aftermarket mastic, foil tape, and insulated flex from trade-recognized suppliers. Our equipment roster includes Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman - brands customers can verify independently. We carry common Lennox cabinet gaskets, blower door hardware, and coil treatments on our Cumming trucks for same-visit completion when possible.
Lennox Service Pricing in Cumming
| Service | Typical Range in Cumming |
|---|---|
| Whole-system air duct cleaning (2,500-3,500 sq ft) | $380-$680 |
| Duct sealing (mastic + tape, per system) | $200-$450 |
| Video inspection with documented photo record | Included on every job |
| Evaporator coil cleaning (in-place, Lennox slab coil) | $180-$320 |
| EPA-registered sanitizing treatment | $120-$220 |
What drives cost: square footage, number of duct runs, accessibility (attic platform vs. garage closet), and whether we find construction debris compaction or failed seals that need correction before cleaning. Every estimate includes the full video inspection and written scope. We do not quote per-vent pricing, and we do not offer teaser coupon rates that change once the truck arrives. Call (678) 693-5322 for a written estimate - estimates are free, and we provide a Free Second Opinion on any competitor’s written quote.
Serving Cumming, GA - Our Local Coverage Area

We’re based in the Cumming 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 Cumming
Yes, if the system was never cleaned after construction. In Cumming’s rapid-build subdivisions, framing and HVAC crews often worked simultaneously, blowing red Georgia clay dust and drywall particulate into duct boots before registers were installed, which is why our Dryer Vent Cleaning in Cumming crews often find similar construction debris issues in adjacent laundry venting. We routinely pull registers in 15-year-old Cumming homes and find the original construction debris still compacted at the bottom of the plenum, untouched since move-in day. That debris restricts airflow and harbors moisture. Call (678) 693-5322 and we’ll show you what’s inside with the camera before you decide.
Lake Lanier’s evaporative effect keeps attic dewpoints measurably higher in shoreline and cove subdivisions. A Lennox air handler with even a small cabinet-seam gap pulls that damp attic air into the return drop, wetting duct surfaces enough to support mold growth. Inland Forsyth homes a few miles north, at slightly higher elevation and without the lake effect, rarely show the same pattern. We smoke-test every lakeside Lennox cabinet before cleaning to find and seal those gaps. Call (678) 693-5322 for an inspection.
Two-zone Lennox systems need damper verification before cleaning. A failed or stuck damper in one zone can leave flex duct pressurized and sagging, which cleaning alone won’t fix. We test each zone’s airflow and damper position during our pre-cleaning video inspection. If a damper is failed, we flag it in the written scope before proceeding. Call (678) 693-5322 and we’ll assess your specific zoning configuration.
Most Lennox slab coils in horizontal cabinets can be accessed through the blower door or a dedicated coil panel without full disassembly. We use HEPA-contained negative-pressure extraction and foaming cleaner applied to the coil face, with a drain pan treatment to prevent overflow. If the coil is rusted into the pan or the cabinet is compromised, we’ll show you the photo and explain whether cleaning or replacement makes economic sense. Call (678) 693-5322 for a written assessment.
No. Duct sealing with mastic and foil tape is maintenance work on the distribution system, not modification of the Lennox air handler or condenser itself. We use genuine Lennox OEM parts for any control board, blower motor, or coil component work so your system’s ratings and any remaining warranty path stay intact. Our duct sealing materials are quality aftermarket products from recognized HVAC suppliers, not hardware-store tape. Call (678) 693-5322 for specifics on your system.
Service Areas Near Cumming

We run Cumming service area calls throughout Forsyth County and into neighboring communities. Our crews are regularly in Lennox service in Buford for homes along the Hall County line, Lennox service in Milton for the newer estate subdivisions, plus Suwanee, Alpharetta, and Johns Creek. The same 2000-2015 builder-grade Lennox housing stock extends across this whole corridor, so the failure patterns we document in Cumming - compacted plenum debris, cabinet air leaks, and kinked flex returns - show up consistently in these neighboring markets.
Book Your Lennox Service in Cumming Today
Call (678) 693-5322 to schedule your Lennox system inspection. A live person answers every call, and we’ll send a written estimate before any work starts. Every job includes video inspection, a Documented Photo Record of every duct run, and our 365-Day Done Right Promise in writing. We’re independently owned and operated under the Haven Standard, and we’ve been serving Cumming homeowners since 2013.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Cumming, serving Cumming since 2013.




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