Fast, Reliable Air Duct Cleaning Across Seattle
Air duct cleaning in Seattle typically runs $350-$650 for a standard residential system, with most jobs completed in a single visit by our background-checked, uniformed technicians. We’re familiar with the specific challenges Seattle homes face - the persistent marine humidity, the retrofitted ductwork in pre-WWII houses, and the mold issues that standard cleaning alone won’t solve. Our Air Duct Cleaning team serves Seattle homeowners from Ballard to Beacon Hill with no-hassle upfront pricing and a 90-Day Done Right Promise in writing. Call (844) 685-6342 for a free estimate - we’ll be there when we say.
Why Bellows Air Duct & Vent Co. Is Seattle’s Preferred Air Duct Cleaning Company
We’ve been serving homeowners since 1984, and our reputation in Seattle is built on one thing: never needing to be called back. Our customers in Capitol Hill, Queen Anne, and Fremont know that when we finish a job, the duct camera doesn’t lie - we show them the before and after, and we stand behind it with no paperwork, no arguing.
Our response time to Seattle addresses is typically same-day or next-day, with calls answered by a live person 24 hours a day - not a voicemail, not an app. We understand the local housing stock: the 1910s-1940s Craftsman bungalows with boiler heat retrofitted to forced air, the hillside crawl spaces that stay damp year-round, the post-2021 heat pump installations that need early inspection. This isn’t generic knowledge. It’s 42 years of seeing what fails in marine climates and fixing it right.
Our Air Duct Cleaning Services in Seattle
Residential Duct Cleaning
Seattle’s indoor relative humidity stays at 75-85% year-round even when it’s not raining. That moisture turns fiberglass-lined supply ducts into mold incubators within months of a system sitting idle through our mild summers. Our residential cleaning in Seattle neighborhoods like Ballard (98107) and Fremont (98103) starts with a Rotobrush camera inspection, then mechanical agitation with professional-grade equipment to remove biological contamination - not just dust. Most homes are completed in one visit.
Commercial Duct Cleaning
Commercial buildings in Seattle’s downtown core and neighborhood business districts face the same humidity challenges as homes, but with larger systems and higher occupancy loads. We clean supply and return trunk lines, VAV boxes, and terminal units using Nikro and Abatement Technologies equipment, with full video documentation for facility managers. Our crew works around your hours to minimize disruption.
Supply Duct Cleaning
Supply ducts are where Seattle’s mold problem lives. In hilly neighborhoods like Queen Anne (98109) and Beacon Hill (98108), retrofit supply runs frequently travel 20-30 feet through vented crawl spaces sitting inches above damp soil on steep grades. These sections are invisible from the registers. Our camera almost always finds mold colonization here - a failure mode essentially unknown in flat-terrain cities where basement duct runs stay conditioned and dry. We clean mechanically, then apply EPA-registered biocide when indicated.
Return Duct Cleaning
Return ducts pull air from your living space, but in Seattle’s older homes they often draw from damp crawl spaces through compromised connections. We inspect and clean return plenums, trunk lines, and boot connections, sealing gaps that allow humid crawl space air to enter the system. This matters more in Seattle than nearly anywhere else in the country.
Video Inspection
Every job starts and ends with camera verification. We use Rotobrush video inspection to document conditions inside your ductwork - not to sell you something you don’t need, but to show you what the humidity has done. In Seattle, we regularly find mold in ducts that looked clean from the register. The camera doesn’t lie, and we share the footage with you before and after.
Full System Cleaning
A full system cleaning addresses supply ducts, return ducts, the blower compartment, and the evaporator coil - the complete air path. In Seattle, this is often the right approach because mold in one section has usually spread. We price it upfront, before a single tool is lifted, so the number on the phone is the number on the invoice.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Seattle
We clean and maintain ductwork connected to all major HVAC brands, and we stock local parts for faster turnaround on repairs and sealing work. Our equipment comes from Rotobrush, Nikro, and Abatement Technologies - the same brands serious HVAC contractors specify. For air quality and sanitizing, we use EPA-registered products compatible with Honeywell and Aprilaire systems common in Seattle homes. We don’t show up with a shop vac and a promise. We show up with the right tools for a marine climate.
Common Air Duct Cleaning Problems We See in Seattle Homes
- Mold in fiberglass-lined supply ducts. Seattle’s sustained high humidity allows mold spores already present in Pacific Northwest air to colonize duct interiors within months. Unlike desert or Midwest markets where duct cleaning addresses primarily dust, Seattle jobs routinely require biocide application after mechanical cleaning.
- Hidden mold in crawl space duct runs. In hillside neighborhoods like Queen Anne and Beacon Hill, retrofit ductwork travels through vented crawl spaces that trap moisture against the duct exterior. Homeowners smell mustiness during heat pump use but see clean registers. Our camera finds what eyes cannot.
- Poor sealing in post-heat-dome flex-duct installations. Since the 2021 Pacific Northwest heat dome triggered a citywide rush of ducted heat pump installations, we’ve inspected many newer flex-duct systems with gaps at connections and moisture infiltration points that warrant early attention.
- Damp return air drawn from crawl spaces. Older Seattle homes with retrofitted ductwork often have return plenums pulling humid air from unconditioned spaces, compounding indoor moisture problems and overworking the HVAC system.
Pricing for Air Duct Cleaning in Seattle, WA
| Service | Typical Range in Seattle |
|---|---|
| Standard residential duct cleaning (single system) | $350 - $650 |
| Residential with biocide treatment | $550 - $850 |
| Full system cleaning with video inspection | $650 - $1,100 |
| Commercial duct cleaning (per VAV zone) | $400 - $750 |
| Dryer vent cleaning (add-on) | $125 - $225 |
What moves the price: system size, accessibility of duct runs (crawl space work adds time), condition severity, and whether biocide treatment is indicated after inspection. We disclose everything before work begins - no bait coupons, no price changes at the door. Our $89 Seasonal Tune-Up is available for systems that need inspection more than cleaning. Seniors and veterans receive a permanent 5% discount. Call (844) 685-6342 for an exact quote - estimates are free.
We Also Serve Cities Near Seattle
Our service area extends across the Puget Sound region. We regularly clean ducts in Seattle as well as Bellevue, Kirkland, Shoreline, and Redmond - the same day, the same standards, the same upfront pricing. Wherever you are in King County, we’ll be there when we say.
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 - Air Duct Cleaning in Seattle
The mildew smell almost always originates in duct sections you cannot see from the register - supply runs through damp, vented crawl spaces beneath hillside homes in neighborhoods like Capitol Hill, Queen Anne, or Beacon Hill. We took on a job in a 1920s Craftsman on Capitol Hill (98102) where the homeowner noticed exactly this. Our Rotobrush camera revealed thick mold colonization in the supply duct runs through the vented crawl space. We applied an EPA-registered biocide after mechanical cleaning and recommended annual inspections to prevent recurrence. Call (844) 685-6342 - we’ll camera-inspect and show you what’s hidden.
In most Seattle homes with fiberglass-lined ducts or visible mold, yes - mechanical cleaning alone does not kill mold spores, and our marine climate guarantees rapid regrowth. We evaluate during camera inspection and recommend EPA-registered biocide only when we find biological contamination. The treatment adds $200-$300 to a standard cleaning. Call (844) 685-6342 for an exact quote - estimates are free.
Every 2-3 years for mechanical cleaning, with annual camera inspections if you have retrofit ductwork through crawl spaces. Seattle’s 1910s-1940s Craftsman bungalows across Ballard, Fremont, and Capitol Hill were originally built with boiler or radiator heat and had forced-air ductwork added later, frequently routed through damp, vented crawl spaces - creating hidden mold reservoirs that standard maintenance schedules in drier cities simply do not anticipate. Call (844) 685-6342 to schedule - we’ll be there when we say.
Yes, especially if it was installed in 2021-2023 during the post-heat-dome rush. We’ve found many newer flex-duct systems in Seattle with poor sealing at connections and moisture infiltration points that a camera inspection will reveal before they become mold problems. The $89 Seasonal Tune-Up covers this evaluation. Call (844) 685-6342 to book - estimates are free.
Duct cleaning removes mold and debris from the ductwork itself, but if the smell persists from crawl space vents, the source may be damp soil, inadequate ventilation, or compromised duct connections drawing that air into your system. We camera-inspect to determine whether the problem is in the ducts or the building envelope, and we seal duct connections where we find them. Call (844) 685-6342 - we’ll diagnose it properly and show you what we find.
Ready to see what’s actually inside your ducts? Call Bellows Air Duct & Vent Co. at (844) 685-6342 for a free estimate. We’ll camera-inspect, price it upfront, and stand behind our work for 90 days - no paperwork, no arguing. A square deal, shown before we start.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Seattle since 1984.