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 Seattle, NY | CleanRun Air Duct Cleaning
We provide independent Lennox Air Duct Cleaning - Seattle and repair across the metro, with one thing that sets our work apart here: we know that in this city, duct cleaning is rarely just about dust. Seattle’s marine humidity and crawl-space foundations turn most Lennox duct problems into moisture and biological-growth problems, so we inspect with a camera before we quote, and we document every duct run before and after with photos. Call (806) 606-6902 for a written estimate, no exceptions, no vague “call for a quote” runaround.
Why Seattle Residents Choose Us for Lennox Service
We work on Lennox systems in Seattle’s prewar bungalows and mid-century homes every week, from legacy G-series furnaces to newer EL296V and SL280V units. Tomas Reyes, our owner and lead technician, grew up in Woodside, Queens, in a building where the ductwork hadn’t been touched since the Carter administration, and he got into this trade because he wanted to see what people were actually breathing. He completed his HVAC coursework at Queensborough Community College before spending years working residential and commercial duct systems across all five boroughs, experience that now shapes our HVAC Cleaning in Seattle. That background shaped how we run CleanRun: camera inspection first, written scope second, no work starts until you’ve seen exactly what’s inside your ducts.
We’re an independent Lennox service provider, not manufacturer-affiliated or authorized. That matters because we make recommendations based on what the camera shows and what the price difference actually is between OEM and aftermarket parts, not on a corporate parts program. For Seattle homeowners, that independence often means a written price that’s 30 to 50 percent lower on duct repairs because we recommend quality aftermarket materials that meet or exceed the original spec when it makes sense.
Common Lennox Air Duct Cleaning Problems We Solve in Seattle
- Mold-shedding evaporator coils feeding your supply ducts. Lennox evaporator coils in Seattle’s humid crawl spaces develop surface corrosion and mold that sheds into the supply ductwork. We frequently pull blower panels on Lennox systems here and find coil fins already fouled within a few seasons, not a decade. The fix starts with cleaning the coil and the duct runs downline, then addressing the humidity source so the mold doesn’t return after one rainy season.
- Erratic blower cycling on retrofitted G-series furnaces. The G40, G50, and G60 furnaces found throughout Seattle’s older retrofit homes have 24-volt control boards and blower relays that sit in conditioned air paths. In this city, those air paths pull damp crawl-space return air, which corrodes the boards and causes premature failure and erratic blower cycling. We see this pattern on Queen Anne and Capitol Hill regularly.
- Waterlogged flex duct on hillside homes. Lennox flex duct on hillside neighborhoods like Queen Anne and Beacon Hill sags and traps condensation at low points because the original retrofit routing left no slope for drainage. Those low points become slime traps and rodent-nesting points. Cleaning alone won’t fix it; the duct needs re-supporting or replacement, then sealing.
- Rust scale clogging EL296V heat exchanger passages. EL296V units in Seattle’s tight mechanical closets pull return air from unsealed crawl spaces. The induced-draft motor pulls that moisture across the heat exchanger, causing rust scale that breaks loose and clogs secondary heat exchanger passages. We’ve documented this pattern on multiple EL296V systems in Seattle, and it’s a duct-plus-equipment problem, not a simple cleaning job.
- Condensation dripping from supply registers after the 2021 heat dome retrofit wave. The June 2021 heat dome pushed air conditioning into pre-1950s craftsman bungalows that were never designed for ducted cooling. Many of those rushed retrofits skipped proper mastic sealing and now draw humid crawl-space air directly into Lennox supply trunks, causing visible condensation on registers every summer. The duct cleaning is the first step; the sealing and crawl-space work is what keeps the problem from coming back.
BeforeAfterLennox Service in Seattle: What Local Conditions Mean for Your Equipment
Seattle’s marine climate produces chronically high humidity year-round, not just seasonal spikes, and the city’s widespread crawl-space foundations trap that moisture directly around ductwork. This means Seattle duct cleaning is fundamentally a biological-growth and moisture-contamination problem, mold, rodent debris, fungal spores in damp under-house ducts, rather than the simple accumulated-dust issue technicians address in drier inland cities. Our crews working Seattle’s hillside neighborhoods, Queen Anne, Beacon Hill, Capitol Hill, consistently pull duct panels to find not dusty registers but actively moldy flex duct and sheet metal saturated from below. The crawl space beneath acts as a year-round humidity chamber. Cleaning without also recommending crawl-space encapsulation often means the mold returns within a single rainy season. For Lennox owners specifically, that humidity means evaporator coils corrode faster, control boards short sooner, and heat exchangers rust from the outside in. The photo tells you what’s in there. Everything else is just paperwork.
Lennox Models & Products We Service in Seattle
We service the full range of Lennox equipment found in Seattle homes, including the legacy G40, G50, and G60 furnaces common in older retrofits, the EL296V high-efficiency two-stage variable-speed furnace, the SL280V variable-speed 80% furnace with sealed combustion, and the CBX25UH and CBX32M air handlers used with heat pumps and AC retrofits. For parts, we stock OEM Lennox-compatible components when the unit is under a third-party home warranty or when the customer insists on OEM. For older G-series and EL-series ductwork, we often recommend quality aftermarket coils, blower wheels, and sealing materials that meet or exceed the original spec at 30 to 50 percent lower cost. On any Lennox system over 15 years old with multiple simultaneous failures, we give an honest repair-vs-replace estimate before touching the ductwork. For more on our broader Lennox experience, see our Lennox sales & service page.
Lennox Service Pricing in Seattle
Air duct cleaning for a typical Seattle home generally runs $450 to $900 for a full system, depending on the number of duct runs, access difficulty, and how much biological growth needs remediation. Duct sealing adds roughly $600 to $1,400 depending on the linear footage and whether we’re sealing metal or replacing waterlogged flex. Crawl-space encapsulation-ready duct cleaning, where we clean and prep the ducts for encapsulation work, typically lands between $800 and $1,800 because it includes vapor barrier assessment and moisture mapping. Every job gets a written price before a single panel comes off. No per-vent pricing, no $79 coupon that turns into a four-figure invoice once we’re on site. Call (806) 606-6902 for an exact written estimate.
Serving Seattle, WA - Our Local Coverage Area
We’re based in the Seattle 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 Seattle
Because the mold isn’t starting in the ducts. It’s starting in the crawl space below them. In Seattle, the crawl space under your home acts as a humidity chamber nearly year-round, and that moisture migrates into your Lennox ductwork through unsealed joints, corroded duct surfaces, and the insulation itself. Cleaning the ducts removes the current growth, but if the humidity source remains, the mold recolonizes within one rainy season. The fix is cleaning plus sealing plus crawl-space moisture control, often a basic vapor barrier at minimum. Call (806) 606-6902 and we’ll show you the moisture readings before we recommend anything.
On a 20-year-old G50 in Seattle, you’re almost certainly looking at a blower motor that’s been pulling damp crawl-space air for two decades, which means the blower wheel, the control board, and possibly the heat exchanger have all aged faster than their calendar age suggests. If the blower is the only failure, replacing it with a quality aftermarket blower can buy you a few more years at 30 to 50 percent below OEM cost. But if the camera shows corrosion inside the heat exchanger or the board is already failing, the honest math usually points toward replacing the furnace rather than pouring money into a 20-year-old unit. We’ll give you that repair-vs-replace estimate in writing before any ductwork is touched. Call (806) 606-6902.
Because your supply ductwork is below the dew point. That happens when humid crawl-space air is being drawn into the duct system through unsealed joints and gaps, then hitting the cold conditioned air from your Lennox AC. The moisture condenses on the inside of the register and duct walls, and it drips. This is extremely common in Seattle after the 2021 heat dome retrofit wave, when AC was rushed into homes with ductwork that was never sealed for cooling. The fix is duct sealing and crawl-space air-sealing, not just cleaning. Call (806) 606-6902 for a camera inspection and written scope.
Yes, and we see it regularly on Lennox units in Seattle. The rust doesn’t require a visible leak. When humid return air passes across a cold heat exchanger, condensation forms on the metal surface. Over years, that condensation causes rust scale to build up and flake off, clogging secondary heat exchanger passages on high-efficiency units like the EL296V. The blower may still run and the unit may not trip any safety switch, but efficiency drops and the risk of carbon monoxide exposure increases as passages clog. This is a safety issue, not a comfort issue. If you suspect heat exchanger rust, call (806) 606-6902 and ask for the camera inspection. Do not attempt to clean or repair a rusted heat exchanger yourself.
In Seattle, duct sealing and duct replacement generally do not require a separate permit when done as part of routine maintenance on an existing system, but any new duct runs or major system alterations may fall under the city’s mechanical permit requirements. The cleanest answer is that we handle the paperwork on our end and tell you in writing before work starts whether your specific job needs a permit. We don’t guess, and we don’t skip steps. Call (806) 606-6902 and we’ll confirm what applies to your home.
Service Areas Near Seattle
We serve Seattle and the surrounding metro, including neighborhoods across Ballard, Fremont, Wallingford, Capitol Hill, and Queen Anne. Our crews also cover nearby communities, and we maintain dedicated service coverage for Seattle service area customers plus extended work in other major metros. If you’re comparing options elsewhere, see our pages for Lennox service in Denver and Lennox service in El Paso.
Book Your Lennox Service in Seattle Today
If your Lennox ductwork is showing signs of moisture, mold, or restricted airflow, don’t wait through another rainy season. We’ll inspect with a camera, write the scope, and hand you the price before any work starts. Call (806) 606-6902 now to schedule your Lennox duct cleaning or repair in Seattle.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning, serving Seattle since 2013.