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 SeaTac
Air duct cleaning in SeaTac typically runs $350 – $650 for a full residential system, with most homes in the 98148, 98158, and 98168 ZIP codes falling toward the middle of that range. We’re the local crew that shows up when we said we would, prices the job in writing before touching anything, and stands behind it for a full year.
Our dispatch team coordinates from the Seattle office, but our crews live and work in the SeaTac area. We know the difference between a 1972 rambler off South 188th Street with original galvanized duct and a 2005 townhome on International Boulevard with flex duct and an undersized return. That local knowledge matters because the gray-black aviation fuzz we pull out of SeaTac ducts behaves nothing like ordinary house dust, and treating it wrong just wastes your money. Call us at (361) 326-5060 for a free estimate, or read on to understand what your system actually needs.
Why Hollis Air Duct Cleaning Is SeaTac’s Preferred Air Duct Cleaning Company
We’ve been doing this since 2004 as part of the Garrison Partners family, and our Air Duct Cleaning team has learned what separates a real clean from a register vacuum in a SeaTac uniform. Our technicians are background-checked, wear company uniforms, and arrive inside the quoted window. The price is written down before any work starts, and it does not move at the door.
Our 365-Day Done Right Promise covers every job in writing. If the work fails within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no runaround. Phones are answered by a live person 24 hours a day, 7 days a week. That’s The Garrison Standard, and it’s how we operate in SeaTac and every community we serve.
We serve the full spread of SeaTac neighborhoods, from the Angle Lake area west of the airport to the dense apartment corridors along International Boulevard and the industrial pockets near SR-518. Each has its own ductwork personality, and we price accordingly.
Commercial Air Duct Cleaning in SeaTac
Commercial Air Duct Cleaning in SeaTac covers office suites, warehouses, retail spaces, and light industrial facilities from the airport corridor down to the distribution centers near I-5. These systems run harder and longer than residential units, and the aviation particulate and road grit loading near Sea-Tac International accelerates buildup in commercial returns. A typical commercial cleaning in SeaTac runs $800 – $2,400 depending on system size and accessibility, with most small-to-mid-size jobs landing between $1,200 and $1,800.
Negative-Air Source Removal
We put the commercial system under negative pressure using Nikro equipment, then agitate debris loose with rotary tools and extract it through HEPA filtration. This is mechanical source removal, not surface vacuuming. For SeaTac commercial clients near the airport, this matters because the oily aviation fraction in your ductwork won’t lift without agitation and negative airflow working together.
Post-Clean Verification
After cleaning, we run a video inspection through the trunk lines and document the results. You see what we saw before and what remains after. No guesswork, no trust-me handshake. The Garrison Standard requires verifiable outcomes on every commercial job.
Air Duct Cleaning Services in SeaTac
Air Duct Cleaning Services in SeaTac cover the full residential system: supply ducts, return ducts, trunk lines, and the air handler cabinet. Most SeaTac homes need this every 3 – 5 years, though homes near I-5, SR-518, or under the airport flight path often run shorter cycles due to particulate loading. A complete residential cleaning in SeaTac typically costs $350 – $650, with larger homes or systems requiring access through crawlspaces trending toward the upper end.
Rotary Brush Mechanical Cleaning
We use Rotobrush rotary brush systems to physically scrub debris from duct walls, followed by negative-air extraction. This is the only method that removes the bonded gray-black film unique to SeaTac ductwork. Fogging chemicals into an uncleaned duct just seals that film in place with moisture. We don’t do that.
Duct Sealing with Mastic
After cleaning, we inspect joints and seams for leakage. Where we find gaps, we apply duct sealing mastic, a thick compound that closes leaks permanently without the toxicity of spray foam. Sealed ducts hold their cleanliness longer and don’t pull unfiltered crawlspace air back into your system.
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.
Trusted Brands We Service in SeaTac
Our equipment roster includes Rotobrush rotary systems, Nikro negative-air machines, and filtration products from Honeywell, Aprilaire, and Abatement Technologies. These are the same tools commercial crews use in hospitals and schools, not hardware-store attachments. We stock common filtration components locally for SeaTac customers, so if your system needs a new Honeywell media filter or an Aprilaire cabinet upgrade after cleaning, we can often handle it same visit rather than ordering and rescheduling.
Common Air Duct Cleaning Problems We See in SeaTac Homes
- Aviation exhaust bonding to flex duct walls. The jet particulate near Sea-Tac International carries an oily fraction that adheres to the vinyl surface of 1990s-2000s flex duct along International Boulevard. Ordinary vacuuming won’t touch it. Mechanical agitation and negative-air extraction are required.
- Damp crawlspaces seeding microbial growth into supply runs. The marine climate keeps crawlspaces under west-side ramblers damp year-round. We regularly find musty odors and mold spores in supply ducts that were “cleaned” six months prior by a crew that ignored the crawlspace entry point.
- Undersized returns trapping debris past the register. Many SeaTac apartments and split-levels were built with returns too small for modern airflow. Debris accumulates in the unreachable throat behind the grille. Register vacuuming misses it entirely.
- Sanitiser fogging sold on uncleaned ducts. In SeaTac’s climate, this is worse than useless. You’re spraying moisture onto an oily aviation-and-rubber film, sealing it in place and creating a buffet for microbial growth. We see the results every fall.
Pricing for Air Duct Cleaning in SeaTac, WA
Here’s what air duct cleaning actually costs in the SeaTac market, based on the jobs we’ve priced and completed here:
| Service | Typical Range in SeaTac |
|---|---|
| Full residential system cleaning (supply + return + trunk) | $350 – $650 |
| Small home or condo (under 1,200 sq ft) | $280 – $420 |
| Large home or complex layout (over 2,500 sq ft) | $550 – $850 |
| Commercial system cleaning | $800 – $2,400 |
| Video inspection add-on | $75 – $125 |
| Duct sealing with mastic (per system) | $150 – $350 |
What moves a job within these ranges: crawlspace access difficulty, number of supply and return branches, whether the system has original flex duct or rigid metal, and how long since the last cleaning. We give one flat price per system, agreed in writing before work starts. No per-vent pricing, no add-ons at the door. Call (361) 326-5060 for your exact quote. Estimates are free.
We Also Serve Cities Near SeaTac
Our crews work throughout the Puget Sound region. If you’re outside SeaTac proper, we also provide Air Duct Cleaning in SeaTac and surrounding communities including Seattle, Spokane, Tacoma, and Vancouver. Scheduling is coordinated from our Seattle office with local dispatch to each area.
Serving SeaTac, WA - Our Local Coverage Area
We’re based in the SeaTac 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 SeaTac
SeaTac ductwork carries a signature gray-black fuzz that blends jet exhaust particulate from Sea-Tac International with rubber tire dust off I-5 and SR-518. The oily aviation fraction bonds to duct walls rather than settling like ordinary dust, which is why our crews see it here and not in nearby cities. That bonded layer requires mechanical agitation to remove, not just vacuuming. Call (361) 326-5060 if you’re seeing dark buildup around your registers.
Only if there’s active microbial growth present, which we verify with a camera inspection after mechanical cleaning. The damp crawlspaces under many SeaTac homes, especially west-side ramblers near Angle Lake, can seed mold spores into duct liners. In those cases, sanitising after source removal makes sense. Fogging sanitiser into uncleaned ducts does not, it seals moisture against the aviation-film layer and accelerates regrowth. We’ll show you the camera footage and recommend based on what we find, not as a default upsell.
No. The flex duct and undersized returns in 1990s-2000s SeaTac apartment construction trap debris past the reachable point. Register vacuuming cleans the first six inches. The remaining fifteen feet of flex run stays loaded. We use rotary brush tools fed through the full duct length, with negative-air extraction at the air handler, to source-remove debris from the entire branch. That’s the difference between a real clean and a cosmetic one.
Source removal means physically dislodging debris from duct walls and extracting it from the system, not just vacuuming what you can reach. A cheap coupon clean typically runs a shop vac around the registers and calls it done. Source removal uses mechanical agitation, negative-air machines, and HEPA filtration to pull debris out of the entire duct network. In SeaTac’s aviation-loaded environment, source removal is the only method that actually reduces particulate levels. The coupon clean just redistributes it.
Yes, if the space has a forced-air system serving employees or inventory. The particulate loading near Sea-Tac International is significantly higher than regional background levels, and commercial systems recirculate that load continuously. For spaces under 5,000 square feet, commercial cleaning typically runs $800 – $1,500 and can often be scheduled with minimal disruption to operations. Call (361) 326-5060 to discuss your system’s layout and we’ll price it in writing before we start.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving SeaTac since 2004.