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 Alexandria Homeowners Choose Lennox Air Duct Cleaning
CleanRun Duct Repair & Cleaning provides Alexandria Lennox service for air duct cleaning throughout the city, with technicians who have spent years inside Lennox variable-speed air handlers and two-stage furnaces across the city. Our work is built around a written price delivered before any equipment leaves the van, a documented photo record of every duct run, and the 365-Day Done Right Promise backed in writing on every job. We are not affiliated with or authorized by Lennox; we are an independent service provider that diagnoses the actual cause instead of defaulting to a factory script. Call (240) 318-7712 for a written estimate.
Alexandria’s housing stock presents a genuinely distinct technical challenge for Lennox systems. Old Town’s 18th- and 19th-century brick rowhouses had central HVAC retrofitted decades after construction, routing ductwork through cramped plaster-and-lathe walls and shallow attic cavities never designed for it. These systems, now 40-60 years old and sitting in a low-lying Potomac waterfront city with persistently high ambient humidity, accumulate contaminants at rates that make duct cleaning here different from anything in Fairfax or Loudoun Counties. The DC metro’s humid subtropical climate intensifies along Alexandria’s riverfront, with summer humidity regularly spiking above 75-80% RH followed by forced-air heating in winter. That cycling creates ideal conditions for mold colonization inside duct lining, especially in the older flex duct and fiberglass-lined systems common in the city’s mid-century Cape Cods and ramblers in Del Ray and Arlandria.
Why Trust CleanRun Duct Repair & Cleaning for Your Lennox Air Duct Cleaning?
Tomas Reyes, our owner and lead technician, grew up in Queens, NY, and picked up his HVAC fundamentals at the Apex Technical School in Long Island City before spending two decades working through every configuration of ductwork a mid-Atlantic climate can throw at a system. He and our crew have been servicing Alexandria for years, including older colonial-era homes near Del Ray where flex duct gets pinched in ways that would surprise most homeowners. Tomas is known for pulling the access panel, photographing what’s inside, and walking the customer through exactly what they’re looking at before any cleaning equipment leaves the van. The duct doesn’t lie - we just show you what’s in it.
That approach matters specifically with Lennox equipment. We’ve torn into enough Dave Lennox Signature Collection SL280V units and Elite Series EL296V two-stage furnaces across Alexandria to know their quirks: how the variable-speed blower in a Signature system responds to restricted return airflow, why the Elite’s evaporator coil collects debris the way it does, where the Merit Series ML180 tends to develop duct board deterioration. We stock genuine Lennox replacement filters, gaskets, and key control parts alongside quality aftermarket equivalents for discontinued models. Every technician is background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews. Our equipment roster includes Rotobrush, Nikro, Abatement Technologies, Honeywell, Aprilaire, and Guardsman - brands you can look up independently before you agree to any price.
Common Lennox Air Duct Cleaning Problems We Fix in Alexandria
- Failed MERV 16 media filters starving blower motors in Signature Collection units. The Dave Lennox Signature Collection SL280V ships with a MERV 16 filter that creates substantial static pressure. In Alexandria’s older homes with already-restricted return ductwork - especially retrofitted systems in Old Town with narrow wall chases - that filter can choke the variable-speed blower and cause overheating. We’ve found units where the motor was cycling on thermal limit because the filter was simply too dense for the available airflow. We clean the full return path, scrub the blower wheel, and specify a properly sized MERV 11 that protects the coil without starving the motor.
- Dirty evaporator coils on Elite Series systems from undersized filter cabinets pulling bypass air. The Lennox Elite Series EL296V relies on a sealed filter cabinet, but in many Alexandria installations the cabinet was field-modified or poorly sealed during retrofit into tight mechanical spaces. Unfiltered air bypasses the media and coats the evaporator coil with a fine layer of dust and organic material. That coating reduces heat transfer efficiency and provides a substrate for mold growth in our humid climate. We clean the coil in place when possible, document the before and after with photos, and seal the cabinet properly.
- Fiberglass duct board deterioration inside Lennox plenums shedding particles into supply ducts. Older Lennox air handlers, particularly Merit Series ML180 installs from the 1990s and 2000s, used fiberglass-lined duct board for the supply plenum. In Alexandria’s humidity-cycling environment, that lining breaks down over time. The surface erodes, and fibers detach into the airstream. Our camera inspection shows this clearly: a fuzzy, degraded surface where there should be smooth metal. We remove deteriorated sections and replace with solid sheet metal where accessible, or clean and seal with appropriate encapsulant where structural replacement would require alterations restricted by the Board of Architectural Review.
- Flex duct runs on Merit Series installs that kink or sag, reducing airflow to far rooms. Lennox Merit Series systems were often installed with cost-conscious flex duct runs, particularly in Alexandria’s mid-century garden apartments and West End ramblers. Over decades, supports fail and ducts sag into attic insulation or get pinched where they pass through tight framing. The result is rooms that never reach set temperature and a system that runs longer than designed. We locate the restriction with camera inspection, photograph the sag or kink, and restore proper support and routing.
- Mold colonization in iComfort-enabled air handlers from condensate drainage issues. Lennox iComfort systems with communicating thermostats are precise about humidity control, but that precision depends on clean condensate pathways. In Alexandria’s high-humidity environment, algae and biofilm clog drain pans and trap lines, causing overflow that wets surrounding ductwork. We clean the pan, clear the trap, treat with appropriate sanitizer, and document the drainage flow rate before closing up.
BeforeAfterLennox Parts & Our Repair-vs-Replace Approach
We stock genuine Lennox replacement filters, gaskets, and key control parts for the model lines we see most in Alexandria: Dave Lennox Signature Collection SL280V, Elite Series EL296V, Merit Series ML180, and iComfort-enabled air handlers. For discontinued models, we source high-quality aftermarket equivalents that meet or exceed original specifications. Our van inventory includes the common filter sizes, blower belts, and control boards that let us complete most jobs without a return trip.
We will always tell you if an aging Lennox heat exchanger or air handler is better replaced than repaired. No pressure either way. Haven Standard Clause 1 requires a written price before any work starts, so you have the number in hand while you decide. In Old Town’s historic district, where the Board of Architectural Review often prevents exterior alterations to protected structures, replacement may not be structurally or legally possible - making professional cleaning and sealing the only viable path. Call (240) 318-7712 and we’ll put our assessment in writing.
Our Lennox Service Process - Step by Step
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Diagnosis with camera inspection. We pull the access panel and run a camera through every accessible duct run, photographing the condition of the plenum, branches, and registers. For Lennox variable-speed systems, we also measure static pressure across the filter and coil to identify restrictions the blower is compensating for.
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Written scope and price. Before any cleaning equipment leaves the van, we deliver a written price listing exactly what we’ll clean, what parts we’ll replace, and what the total cost will be. Haven Standard Clause 1 - no exceptions.
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Negative-pressure extraction and mechanical agitation. We use Rotobrush and Nikro equipment sized to the duct diameter, with HEPA filtration on the vacuum collection. For Lennox systems with fiberglass-lined duct board, we adjust brush stiffness to avoid further damaging degraded surfaces.
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Component-level cleaning. Blower wheel, evaporator coil, and condensate pan are cleaned and inspected. On iComfort-enabled systems, we verify that all communicating components are responding correctly before closing the cabinet.
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Testing and documentation. We run the system through a complete heating or cooling cycle, measure supply and return temperatures, and deliver your documented photo record showing every duct run before and after. The 365-Day Done Right Promise goes into writing before we leave.
Lennox Products We Service & Install in Alexandria
We service and clean ductwork connected to Lennox Dave Lennox Signature Collection variable-speed furnaces including the SL280V, Elite Series two-stage units including the EL296V, Merit Series single-stage furnaces including the ML180, and all iComfort-enabled air handlers and heat pumps. Our technicians are familiar with the filter specifications, blower configurations, and control sequences specific to each line. We also service Lennox packaged units and rooftop systems common in garden apartment conversions, and we offer Lennox service in Arlington as well. Equipment on our vans includes Rotobrush duct cleaning machines, Nikro HEPA vacuums, Abatement Technologies air scrubbers, and Honeywell, Aprilaire, and Guardsman filtration and sanitizing products.
We Also Service These Brands
CleanRun Duct Repair & Cleaning is not a single-brand shop. We service Trane, Carrier, and other major HVAC brands with the same documented approach: written price first, photo record on every job, 365-Day Done Right Promise in writing. Our multi-brand experience means we recognize when a problem is ductwork-related rather than equipment-specific, and we won’t sell you a new furnace when what you actually need is a thorough duct cleaning and sealing.
FAQs - Lennox Air Duct Cleaning Service in Alexandria
No. We are an independent Lennox service provider, not affiliated with or authorized by Lennox International. We diagnose based on what we find in your system, not a factory script. Our technicians have years of hands-on experience with Lennox variable-speed and two-stage equipment across Alexandria, and we back our work with the 365-Day Done Right Promise in writing.
The communicating controls in iComfort systems are sensitive to static pressure changes. If a heavily clogged filter was removed or duct restrictions were cleared during cleaning, the system may detect airflow values outside its expected range and throw a code. We verify all iComfort components are communicating correctly before we leave, and if a code appears afterward, we return to recalibrate - covered under our 365-Day Done Right Promise. Call (240) 318-7712 if you see a code after service.
Yes. Variable-speed blowers modulate airflow based on demand, which means they run longer at lower speeds than single-stage systems. That extended runtime pulls more particulate through the return ductwork over time, and the blower wheel itself accumulates debris more gradually but more thoroughly. We clean the blower wheel and housing as standard on every Lennox variable-speed service, not as an upsell. The camera shows whether it’s needed; we don’t guess.
Often, yes. The Elite Series EL296V has a split-design cabinet that allows access to the coil through the front panel in most installations. We use low-pressure foaming cleaner and HEPA vacuum extraction to avoid pushing debris into the ductwork downstream. If the coil is severely impacted or the cabinet was field-modified during a tight retrofit in an Old Town rowhouse, we photograph the restriction and discuss options with the written price in hand before disassembling anything.
It can be, especially in Alexandria’s older homes with restricted return ductwork. The Dave Lennox Signature Collection SL280V is designed for that filter, but the duct system it’s connected to may not be. High static pressure from a dense filter in undersized returns starves the blower, raises energy consumption, and can trigger high-limit trips. We measure actual static pressure during our inspection and specify a filter that protects your coil without overloading your specific duct configuration.
For Lennox systems in Alexandria, we recommend Air Duct Cleaning services and inspection every three to five years, with cleaning as the camera indicates. The Potomac waterfront humidity accelerates mold colonization in fiberglass-lined and flex duct systems, so homes in Old Town or near Hunting Creek may need more frequent attention than drier inland locations. Homes with pets, recent renovation, or occupants with respiratory sensitivity should inspect more often. Call (240) 318-7712 to schedule a camera inspection - estimates are free, and you’ll see exactly what’s inside before deciding on cleaning.
Book Your Lennox Service in Alexandria, VA
Call (240) 318-7712 to speak with a live person and schedule your Lennox duct cleaning. You’ll get a written price before any work starts, a documented photo record of every duct run, and the 365-Day Done Right Promise in writing. Free second opinion on any competitor’s written estimate.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Alexandria since 2013.