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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AfterFast, Reliable Air Duct Cleaning Across Seattle
Air duct cleaning in Seattle typically runs $350 – $650 for a full residential system and $800 – $2,400 for commercial jobs, with most homes completed in a single visit. We’re the Seattle team at Hollis Air Duct Cleaning, and we dispatch from our local office to handle calls throughout the metro, from Wallingford’s Craftsman blocks to the new construction in South Lake Union. Our phones are answered by a live person 24 hours a day, and we quote a flat price per system before any work starts. Call (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Seattle’s Preferred Air Duct Cleaning Company
We’ve been part of the Garrison Partners family since 2004, and our Seattle crew operates under The Garrison Standard: arrive inside the quoted window, price in writing, complete the job by the book, and leave the site clean. Roy Castellanos leads our operation here, and every technician is background-checked and uniformed – you’ll know who’s walking into your home before they arrive.
Seattle homeowners call us back because we document what we find. In a city where heat pumps have replaced gas furnaces in thousands of pre-war homes, duct cleaning isn’t a commodity service. We show you camera footage of your actual ductwork, explain whether moisture damage requires cleaning or full replacement, and put our 365-Day Done Right Promise in writing on every job. If the work fails within a year, we return and make it right at no charge, including a free second visit.
Our competitors often compete on the lowest teaser price. We compete on discipline: written prices that don’t move at the door, professional-grade Rotobrush and Nikro equipment, and technicians who follow The Garrison Code on every Seattle job.
Air Duct Cleaning Services in Seattle
Air Duct Cleaning Services in Seattle cover the complete removal of dust, debris, mold, and moisture accumulations from your home’s duct network, using negative-air machines and rotary brush systems connected to HEPA filtration. A typical residential full-system cleaning in Seattle runs $350 – $650, with return-only or supply-only cleanings at $180 – $320. Most Seattle homes need this every 3 – 5 years, though homes with heat pumps in undersized legacy ductwork may need more frequent inspection for moisture issues.
Full System Source Removal
We connect a Nikro negative-air machine to your air handler to maintain constant suction while a Rotobrush rotary system scrubs the interior of each supply and return run. This captures dislodged debris at the source rather than pushing it into your living space. For Seattle’s mold-prone climate, we verify HEPA filtration is sealing properly before we start.
Video Inspection and Documentation
Our techs feed a camera through your ductwork before and after cleaning, recording footage you can review. This matters in Seattle’s older housing stock, where we regularly find asbestos tape on original 1950s ductwork or standing water in sagging flex runs. The documentation supports insurance claims when storm damage requires replacement rather than cleaning.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
HVAC Duct Cleaning in Seattle
HVAC Duct Cleaning in Seattle addresses the entire forced-air system, including the air handler, coils, blower assembly, and plenum connections, not just the visible registers. Because so many Seattle homes now run heat pumps through ductwork originally sized for hotter, drier furnace air, we check for condensation points where cooler supply air hits warm attic or crawlspace temperatures. A full HVAC duct cleaning with system inspection in Seattle typically costs $450 – $780 for residential properties.
Heat Pump Compatibility Assessment
We measure airflow and inspect for condensation in supply plenums and trunk lines. Original ductwork in a pre-1940 Craftsman was designed for 140°F furnace air; your new heat pump might push 95°F air with higher humidity. When that air sits below dew point in an unconditioned Seattle crawlspace, you get the musty odor that means hidden mold. We flag these compatibility issues and recommend sealing or re-routing before the mold returns.
Post-Storm Damage Evaluation
After water intrusion from a January storm or backed-up drainage, we determine whether ducts can be cleaned or must be replaced. Saturated fiberglass flex duct cannot be salvaged; the insulation traps moisture and feeds mold regardless of surface cleaning. We document this with dated camera footage and written findings so your insurer understands why replacement is necessary.
Trusted Brands We Service in Seattle
Our Seattle trucks carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, plus filtration products from Honeywell and Aprilaire. We stock common replacement parts locally so we’re not waiting on shipping when your system needs a fresh filter rack, sealed access panel, or upgraded return drop. For Seattle’s heat pump conversions, we source Guardsman-compatible sealing materials rated for the lower temperatures and higher humidity these systems produce. The tools are the same ones commercial crews use on hospitals and schools; we just scale the approach to your home and explain what each piece does while we work.
Common Air Duct Cleaning Problems We See in Seattle Homes
- Asbestos tape on original ductwork in pre-1940 Craftsman homes. We find this regularly in Wallingford, Green Lake, and Phinney Ridge. The tape crumbles when disturbed, so we use negative-air containment and HEPA filtration during any work near these joints, and we document condition for your records.
- Standing water in sagging flex duct from Seattle’s damp crawlspaces. Poor drainage plus 150+ rainy days per year means flexible ductwork often collects water. The musty odor is unmistakable. Cleaning the surface won’t reach mold inside the insulation; we recommend replacement and re-routing with proper slope.
- Condensation in legacy ductwork after heat pump installation. Original undersized supply and return ducts run below dew point with cooler, more humid air. We see re-condensation within days of a standard cleaning if we don’t also address airflow and sealing.
- Pressure imbalances in newer infill townhomes with tight, complex duct runs. These systems are prone to backdrafting and uneven distribution. Our cleaning includes airflow testing to identify restrictions that compound the problem.
Pricing for Air Duct Cleaning in Seattle, WA
A typical residential full-system air duct cleaning in Seattle runs $350 – $650, depending on the number of supply and return vents, accessibility of your air handler, and whether we find moisture damage requiring additional remediation. Commercial systems start at $800 and range to $2,400 for larger buildings in Capitol Hill or the Denny Regrade corridor. Return-only or supply-only cleanings are $180 – $320; video inspection with full documentation adds $85 – $150.
What moves the price: homes with original ductwork in crawlspaces take longer to access safely; post-storm evaluations requiring camera documentation for insurance add time; and heat pump compatibility issues that need sealing or minor re-routing beyond standard cleaning. We give you one flat price per system, agreed in writing, before any work starts. No per-vent add-ons, no equipment charges that appear at the door. Estimates are free. Call (361) 326-5060.
We Also Serve Cities Near Seattle
Our Air Duct Cleaning crews serve Medina, Bellevue, Mercer Island, and Kirkland with the same written pricing and 365-Day Done Right Promise we offer in Seattle proper. Scheduling and dispatch are coordinated from our Seattle office, so response times to the Eastside remain tight.
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 About Air Duct Cleaning in Seattle
Saturated fiberglass flex duct must be replaced; cleaning the surface cannot reach mold growing inside the insulation. Rigid metal duct can often be cleaned if the water didn’t sit long enough to corrode seams or damage connections. We document the distinction with dated camera footage and written moisture readings so your insurer accepts the determination. Call (361) 326-5060 for a post-storm evaluation.
Seattle’s 150+ rainy days and high year-round humidity create condensation inside ductwork, especially in unconditioned crawlspaces and attics, which feeds mold and mildew rather than just accumulating dry dust. Add heat pumps pushing cooler, more humid air through legacy ductwork, and you’ve got a moisture-management problem unique to this climate. Our cleaning protocol addresses this with negative-air source removal and specific checks for condensation points.
Yes. Heat pumps move air at lower temperatures and higher humidity than the gas furnaces most Seattle ductwork was designed for, which means we specifically check for condensation in supply plenums and trunk lines that wouldn’t have been problem areas with a furnace. We also verify your duct sizing can handle the airflow volume your heat pump requires; undersized returns are common in pre-1940 homes and create pressure problems that standard cleaning won’t fix.
We record dated, time-stamped video inspection footage showing the interior condition before any work begins, measure and photograph moisture levels in saturated materials, and provide a written report distinguishing cleanable surface contamination from structural moisture damage requiring replacement. In a 1926 Craftsman bungalow in Wallingford, our tech found a sagging flex run holding standing water after a January storm; the camera documentation and written findings supported full replacement coverage. Call (361) 326-5060 if you need post-storm documentation.
We inspect the air handler, blower assembly, evaporator coil, supply and return plenums, trunk lines, and all accessible duct runs in crawlspaces or attics. In Seattle’s climate, we specifically check for standing water in low points of flex duct, asbestos tape condition on original metal joints, and condensation at the air handler where cooler heat pump air meets warmer ambient temperatures. We also test system airflow to identify restrictions that could re-create moisture problems after we leave.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Seattle since 2004 as part of the Garrison Partners family.