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
AfterLennox Air Duct Cleaning in Sterling, VA | CleanRun Air Duct Cleaning Ashburn
Independent Lennox air duct cleaning in Sterling typically runs $380-$620 for a complete system, and every job starts with a written price before we touch a single panel. We’re not a Lennox-authorized dealer, and we don’t need to be - our crews have worked on Lennox residential equipment in Sterling since the early 2000s, and we carry Lennox-compatible parts on every truck. Call (240) 771-1508 for a free estimate with a written scope.
Why Sterling Residents Choose Us for Lennox Service
Tomas Reyes, our owner, grew up in Queens and built his technical foundation at Manhattan’s Apex Technical School before spending nearly two decades inside Northern Virginia ductwork. He and our crew have logged hundreds of jobs across Loudoun County, including properties near Loudoun Station in Ashburn where newer construction traps unexpected debris. That same eye for what actually sits inside a duct run - not what a sales script claims - is what we bring to our Air Duct Cleaning in Sterling.
We photograph every return air plenum before removing a single screw. Tomas puts it plainly: “I’ll show you the before photo first - then we can talk about what happens next.” This isn’t a pitch. It’s how we avoid arguments. Our Lennox sales & service covers Merit, Elite, and Dave Lennox Signature systems with OEM-compatible controls and aftermarket flex duct that meets or exceeds original specs. Every technician is background-checked and uniformed under Haven Standard Clause 3: Verified Crews. Our license number is published on every page, not buried in a footer.
Sterling homeowners research before they call. We built our company for that. Founded in 2013, 52,000+ homes served, every one with a written price before work started and a Documented Photo Record when the crew left. The 365-Day Done Right Promise is backed in writing, not subject to manager approval.
Common Lennox Air Duct Cleaning Problems We Solve in Sterling
- Dark particulate buildup in flex duct runs. Lennox Merit and Elite air handlers with original builder-grade flex duct in Sterling’s humid attics draw in jet-exhaust-laden outdoor air through unsealed return leaks. The result is a fine dark film coating duct interiors, especially in Potomac Falls and Dulles-area subdivisions along Loudoun County Parkway. Our video inspection catches this before it reaches the evaporator coil.
- Corroded evaporator coils from attic condensation. Lennox coils in 1990s installations - common in Broad Run Farms and Moorefield Village - develop corrosion on aluminum fins when relative humidity hits 70-80% through July and August. Reduced airflow forces the blower motor to work harder and drives up energy bills. We clean coils in place when possible, removing them only when corrosion has penetrated deeply.
- Coil fouling on condensing units near Dulles. Lennox outdoor units in airport-adjacent Sterling neighborhoods experience particulate accumulation on condenser fins from departure-corridor exhaust. Higher head pressures strain the compressor and shorten its service life. Cleaning the coil is preventive maintenance, not a cosmetic service.
- Sagging, kinked flex duct at connection points. Original flexible ductwork from Sterling’s 1987-2002 building boom - still present in thousands of homes - sags at low points, kinks at elbows, and tears where it meets the plenum. Pressure imbalances stress the blower motor and can crack the heat exchanger over time. We repair with mastic-sealed connections and support straps.
- Musty odors from condensation + debris combination. The mix of high attic humidity and compacted debris in original flex duct creates a mold-risk environment. We recently serviced a Lennox Elite EL16XC1 in a 1994 Potomac Falls colonial where our video inspection revealed heavy dark particulate and a corroded coil. Full system cleaning, return leak sealing with mastic, and coil cleaning improved airflow by 30% and eliminated the odor.
BeforeAfterLennox Service in Sterling: What Local Conditions Mean for Your Equipment
Sterling sits immediately adjacent to Dulles International Airport. The Dulles neighborhood and Broad Run Farms lie directly beneath active arrival and departure corridors. Our Sterling service area covers ZIP codes 20164 and 20190, and the pattern we see here doesn’t repeat in Ashburn or Leesburg just a few miles away.
Outdoor air intakes on Lennox systems in these Sterling neighborhoods draw in measurably higher concentrations of jet-exhaust particulates than anywhere else in Northern Virginia. The prevailing westerly winds push departure-corridor exhaust directly over homes near North Sterling Boulevard and the Chase Heritage Apartment Homes area. This particulate - a fine dark film our technicians recognize on sight - coats duct boots and main trunk lines, then migrates to the evaporator coil and blower assembly, which is why Dryer Vent Cleaning in Sterling homes requires equal attention.
The problem compounds with Sterling’s housing stock. Most homes here were tract-built between 1987 and 2002 as two-story colonials and attached townhouses, nearly all with flexible duct systems now well past the 15-25 year service life NADCA recommends. Builder-grade flex runs sag, kink, and harbor compacted debris at low points. The humid attic environment - 70-80% relative humidity through summer months - means condensation forms on poorly insulated duct interiors, creating the exact conditions where particulate buildup becomes a mold risk, not just a maintenance item.
For Lennox owners, this means a system that worked adequately in its first decade now operates with restricted airflow, corroded coils, and blower motors working against pressure imbalances. Cleaning without addressing the underlying duct condition is temporary. We document what we find, photograph every run, and write a scope that addresses the actual condition - not a standardized package.
Lennox Models & Products We Service in Sterling
Our trucks carry Lennox-compatible inventory for the model families most common in Sterling’s 1990s-2000s housing stock:
- Merit Series: 13ACX, ML14XC1, ML17XC1 - entry-level systems common in original Sterling tract builds, often paired with builder-grade flex duct now showing its age.
- Elite Series: EL16XC1, EL18XCV, SL18XC1 - mid-tier units with two-stage and variable-speed blowers that are particularly sensitive to airflow restrictions from dirty ducts.
- Dave Lennox Signature Collection: XC21, XC25, SL25XPV - premium systems where we use OEM controls and sensors to preserve efficiency ratings and warranty terms.
- Lennox Complete Heat: Legacy systems still operating in 1990s Sterling homes, where we assess repair-vs-replace honestly - often a thorough cleaning and duct sealing extends service life by years.
We use OEM Lennox parts for critical controls, heat exchangers, and sensors. For flex duct, insulation, and mastic, we source high-quality aftermarket components that meet or exceed OEM specifications. Every part is named on your written scope before work begins. Our equipment roster includes Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman - brands you can verify independently.
Lennox Service Pricing in Sterling
| Service | Typical Range in Sterling |
|---|---|
| Complete air duct cleaning (single system) | $380 - $620 |
| Video inspection with written report | $89 - $149 (credited toward cleaning if scheduled) |
| Evaporator coil cleaning (in place) | $180 - $290 |
| Flex duct repair / sealing per run | $120 - $220 |
| Full system cleaning + coil + duct sealing package | $740 - $1,100 |
What drives cost: system accessibility, number of duct runs, condition of original flex duct, and whether the evaporator coil requires removal. We do not price per vent. One flat price per system, agreed in writing before work starts, under Haven Standard Clause 1. No per-vent add-ons, no trip-charge surprises.
Every estimate includes the Documented Photo Record as a standard deliverable - before and after photos of every duct run, delivered with your job record. Bring a competitor’s written quote; our Free Second Opinion puts our number next to it at no cost. Call (240) 771-1508 for an exact quote - estimates are free.
Serving Sterling, VA - Our Local Coverage Area
We’re based in the Sterling 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 Sterling
Sterling’s position directly under Dulles International Airport arrival and departure corridors means outdoor air intakes draw in jet-exhaust particulate that coats duct interiors with a fine dark film. Our techs rarely see this pattern in Ashburn or Leesburg. The combination with 25-35-year-old original flex duct and humid attics accelerates buildup beyond what you’d expect in similarly aged homes farther from the airport. Call (240) 771-1508 for a video inspection that shows you exactly what’s inside your system.
Yes, in most cases. We clean Lennox Elite series coils in place using foaming cleaner and low-pressure rinse, with a drain pan safeguard to protect the air handler. We remove the coil only when corrosion has penetrated deeply or fins are damaged beyond field repair. Your written scope specifies which approach applies before we start. The 365-Day Done Right Promise covers either method.
It depends on what the video inspection shows. Original flex duct from Sterling’s 1987-2002 building boom that is merely dirty but structurally intact responds well to cleaning plus sealing with mastic. Ducts with multiple tears, collapsed sections, or degraded insulation need replacement. We give an honest assessment - sometimes cleaning and sealing extends a Lennox system’s life by years; sometimes replacement is the only sound option. No upsell. The photo record shows you why we recommend what we do.
We use OEM Lennox parts for critical controls, heat exchangers, and sensors where system integrity and efficiency ratings are at stake. For flex duct, insulation, and mastic, we use high-quality aftermarket components that meet or exceed OEM specifications. Every part is itemized on your written scope with manufacturer name, so you can verify before approving. We are an independent service company, not authorized or endorsed by Lennox.
For Sterling homes under Dulles flight paths with original flex duct, we recommend inspection every 3-4 years and cleaning when video inspection shows debris buildup exceeding NADCA guidelines. Homes with newer ductwork or air quality upgrades may extend to 5-6 years. The airport-adjacent particulate load here means “set it and forget it” maintenance schedules from other regions don’t apply. Call (240) 771-1508 to schedule a video inspection - estimates are free.
Service Areas Near Sterling
Our crews work the full Loudoun-Fairfax corridor. We provide Lennox service in Ashburn, where newer construction near Loudoun Station presents different debris patterns than Sterling’s 1990s stock. Lennox service in Herndon covers the older Fairfax County neighborhoods with mixed-era housing. We also work Leesburg, Reston, and Chantilly - each with distinct duct conditions that shape how we approach Lennox maintenance and repair.
Book Your Lennox Service in Sterling Today
Call (240) 771-1508 to speak with a live person. We’ll schedule a free estimate with written pricing, perform a video inspection of your Lennox system, and deliver a Documented Photo Record of every duct run before we leave. The 365-Day Done Right Promise means the work is accountable long after the truck pulls away.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Ashburn, serving Sterling since 2013.