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, CA | Morton’s Air Duct Cleaning
We clean and restore Lennox ductwork in Seattle, and if you own a Lennox heat pump or variable-speed furnace here, the single most important thing to know is that this city’s damp crawl spaces are what’s fouling your system, not the equipment itself. Morton’s Air Duct Cleaning is an independent Seattle company, not a Lennox dealership, and we’re not authorized, endorsed, or sponsored by Lennox. We are, however, the crew that understands how a 1920s Wallingford crawl space interacts with a 2023 Lennox air handler. Call (323) 918-4345 for a written price before anyone touches a vent.
Why Seattle Residents Choose Us for Lennox Service
We’ve spent more than a decade inside Lennox residential and light-commercial equipment across this city, and we know how Lennox airflow design, coil configurations, and control boards interact with the ductwork we clean. Paul Adeyemi, our owner, trained in HVAC fundamentals and indoor air quality at Los Angeles Trade-Technical College and has spent the better part of two decades working inside the walls of homes across the West Coast. What that means for your Seattle home is simple: when we open a Lennox air handler on Capitol Hill or in Fremont, we’re not guessing. We know what a Lennox blower does when static pressure climbs, and we know what Seattle crawl-space humidity does to duct tape. We also show up with shoe covers and drop cloths, write the price down before we start, and send a photo of the clean-up before we leave. Every job is backed by our 365-Day Done Right Promise under the Cedarwell Care Promise. You can also read about our broader Lennox sales & service experience and what we do across the full line.
Common Lennox Air Duct Cleaning Problems We Solve in Seattle
- Crawl-space flex runs pulling apart at the collars. In hillside Seattle neighborhoods like Queen Anne and Capitol Hill, flexible ductwork sags and separates where the foundation settles and the marine air never really dries anything out. Your Lennox heat pump’s constant-torque ECM blower compensates by ramping up, which masks the leak while static pressure rises and the coil ices during shoulder-season cooling calls.
- Biofilm on the evaporator coil. Lennox variable-speed air handlers pull moisture-laden, mold-spore-laden air through the cabinet and across the evaporator coil. In Seattle’s 75-85% relative humidity, that wet film builds up season after season until it chokes airflow and trips high-limit or freeze-protection faults. This is the pattern we see again and again in 1910s-1940s Craftsman homes in Wallingford and Beacon Hill.
- Undersized returns on post-2021 heat-pump retrofits. Tens of thousands of Seattle homeowners have installed new Lennox heat-pump air handlers onto original gas-furnace duct systems that were sized and sealed for heating only. The low return static makes the Lennox blower run hot, and the undersized ducts amplify noise and dust resuspension in the living space.
- Duct insulation and joint tape failing decades early. Original joint tape and duct insulation in damp vented crawl spaces degrades quickly, so Lennox equipment ends up conditioning the subfloor. Homeowners read it as a failing Lennox system when the real loss is duct leakage and missing insulation.
- Musty air handler smell when heat comes on in October. Seattle’s systems idle unventilated for five or more months annually, and the first heat cycle of fall pulls air across a coil and pan that have been sitting wet since spring. The smell is the film we just described. Cleaning the coil, blower, and pan resolves it.
Lennox Service in Seattle: What Local Conditions Mean for Your Equipment
Seattle’s marine west coast climate delivers roughly 150-160 overcast or rainy days per year, with humidity that rarely drops low enough to naturally desiccate duct interiors. That matters for Lennox owners in a way it never would in Phoenix or Denver. Your Lennox air handler, especially one installed as part of Washington State’s aggressive heat-pump electrification push, is now running in cooling mode far more than the gas-furnace ductwork it replaced was ever designed to support. We see this on hillside neighborhoods throughout the city. On a 1926 Craftsman in Wallingford, our tech found the original crawl-space flex runs pulled apart at the collar behind a Lennox EL18XCV heat-pump air handler that had been short-cycling all winter on a frozen coil. We performed full system cleaning, sealed the detached collars with mastic, replaced degraded flex in the worst two runs, cleaned the evaporator coil and blower, and the homeowner’s static pressure dropped enough that the Lennox blower stopped hitting its high-limit fault. That’s the Seattle pattern: the equipment is fine, the duct system around it is not.
Lennox Models & Products We Service in Seattle
We work on the full residential Lennox line, including the Dave Lennox Signature Collection SL25KCV and EL18XCV heat pumps, the Merit Series ML14XC1 air conditioners, the Elite Series EL296V and SL297NV gas furnaces, and the Dave Lennox Signature Collection SL280V variable-speed furnaces. When a failed Lennox part is the root cause, we use Lennox OEM coils, blower motors, control boards, and OEM-spec filter racks. For the duct system itself, we use quality aftermarket flex duct, mastic, and insulation. If your Lennox air handler or heat pump is more than 12-15 years old and has a failed compressor or cracked heat exchanger, we’ll give you a straight repair-vs-replace number instead of pushing a repair that won’t last another Seattle winter. You can see the full scope of our Seattle service area and the neighborhoods we cover.
Lennox Service Pricing in Seattle
Air duct cleaning for a typical Seattle home in Wallingford, Fremont, Capitol Hill, or Beacon Hill runs $450-$900 for a full-system clean, depending on the number of returns, the condition of the flex runs, and whether we’re also cleaning the evaporator coil and air handler. Adding evaporator coil cleaning is typically $150-$300 as part of the same visit. Heat exchanger cleaning on a Lennox gas furnace falls in the $125-$250 range when bundled with duct cleaning. What drives a lot of Seattle quotes higher is the access: crawl-space work through a vented pier-and-beam foundation takes longer and costs more than a conditioned basement in another city. A free estimate includes our written price before any work starts, so call (323) 918-4345 and we’ll give you a number you can plan around.
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
Yes, and here’s why: a new Lennox heat pump tied into 80-year-old ductwork that was sized for a gas furnace will immediately run into airflow and humidity problems that a clean, sealed duct system can prevent. In Fremont’s vented crawl spaces, the original flex runs and joint tape have been degrading in damp air for decades, and your new blower will be pulling through every leak and gap. Cleaning and sealing the ducts before commissioning the new system is the single best way to protect a Lennox heat-pump retrofit. Call (323) 918-4345 and we’ll walk you through what we’d do.
Because Seattle’s historical mild summers mean most homes were built without central air conditioning, and your Lennox system sat idle and unventilated for five or more months with moisture trapped in the ductwork and pan. The first heat cycle of October pulls air across that wet, biologically active film and distributes the smell through the house. The fix is coil, blower, and pan cleaning, plus addressing the crawl-space moisture that started it. We’ll show you before-and-after photos of the coil so you can see exactly what was there.
Leaky ducts won’t destroy a Lennox variable-speed furnace, but they will make the blower work against rising static pressure and can trigger high-limit faults, especially on hillside homes where flexible duct has sagged or pulled apart at collars. The blower compensates by ramping up, which masks the leak and increases wear. We see this regularly on Capitol Hill, where the hillside framing settles and the marine air keeps connection tape from ever really drying. Cleaning and re-sealing the duct runs restores the static pressure the Lennox blower expects.
We use Lennox OEM coils, blower motors, control boards, and OEM-spec filter racks when a failed part is the root cause. For the duct system itself, we use quality aftermarket flex duct, mastic, and insulation, because Lennox doesn’t manufacture ductwork and OEM duct materials don’t exist. We’re an independent Seattle company, not a Lennox authorized dealer, and we’ll tell you plainly where OEM matters and where it doesn’t.
No. Duct cleaning does not void a Lennox equipment warranty. In fact, letting biofilm build up on the evaporator coil and allowing the blower to run against high static pressure is far more likely to cause a warranty claim. We clean Lennox systems in Seattle every week, and we’ve never had a manufacturer deny a warranty because the ductwork was properly cleaned. For a written price and a plan, call (323) 918-4345.
Service Areas Near Seattle
We serve the full Seattle service area including Wallingford, Fremont, Capitol Hill, Beacon Hill, and Queen Anne. Our crews also run Lennox duct cleaning for customers in surrounding metro areas. For comparison, see our Lennox service in Nashville-Davidson or our Lennox service in Las Vegas pages to understand how different climates change the work.
Book Your Lennox Service in Seattle Today
When you’re ready to get your Lennox system breathing in Seattle’s damp air the way it was designed to, call Paul and the Morton’s crew at (323) 918-4345. We’ll schedule a time, arrive with shoe covers and drop cloths, and put the price in writing before we start. Before we start, let me show you exactly what we found and exactly what it will cost to fix it.
Written by Paul Adeyemi, Owner at Morton’s Air Duct Cleaning, serving Seattle since our founding in 2005.