In SeaTac, houses stay closed up through long, wet winters, and the same indoor air cycles through the ductwork for months at a time. Whatever the system collects - dust, pollen, damp-season debris - the house keeps breathing it. We clean the system from the main trunk out and inspect it on camera.
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Cleaning, inspection, repair, installation, sealing and commercial work - the full air duct service list for SeaTac, with free inspections and the same crew on every job. This page covers air duct in SeaTac, WA end to end — the services, the local picture and the ZIP codes served.
Cleaning & Care
Air Duct Cleaning
Our negative-air machine seals onto the main trunk duct and puts the whole system under suction first. Then each run is scrubbed individually, so years of dust and debris travel one way only — out of the ducts and into the machine. Heat-pump homes in SeaTac benefit most from a clean trunk, since the fan moves that air more hours of the day. That is air duct cleaning in SeaTac, WA, done the way it should be.
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Cleaning & Care
Air Duct Inspection
Around SeaTac, findings come back in plain language: what is clean, what needs work soon, and what can safely wait. A camera goes inside your ductwork so you can see exactly what's in there — buildup, damage or blockages — before we recommend anything. Inspections are free. That is air duct inspection in SeaTac, WA, done the way it should be.
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Repair
Air Duct Repair
Crushed, torn or disconnected ducts leak the air you pay to heat and cool. Damaged sections are rebuilt and sealed with mastic, so the fix holds through the next wet winter. We repair and rebuild damaged sections so airflow is strong and even again. Air Duct Repair in SeaTac, WA runs on one standard: done properly, checked, and shown to you before we leave.
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Install & Replace
Air Duct Installation
New duct runs for additions, remodels and system upgrades — sized, sealed and balanced so every room gets its share of heating and cooling. Around SeaTac, heat-pump conversions get ductwork checked and sized for the longer fan hours a heat pump runs. Air Duct Installation in SeaTac, WA is one call away, every day of the week.
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Repair
Air Duct Sealing
Leaky joints quietly waste a big share of your airflow. We seal seams and connections with professional mastic for a tighter, more efficient system. Sealed ducts also hold smoke-season air inside the system, filtered, instead of leaking it at every joint. Air Duct Sealing in SeaTac, WA starts with a real look at the problem — never a guess over the phone.
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Cleaning & Care
Commercial Air Duct Cleaning
Offices, restaurants, retail and multi-unit buildings across SeaTac — scheduled commercial duct cleaning with the same negative-air machine sealed onto the trunk, keeping your space comfortable, compliant and breathing clean. Offices across Washington often book after smoke season, clearing stored residue before staff complaints start. For commercial air duct cleaning in SeaTac, WA, one call books the visit and a local tech takes it from there.
Get a free estimateNeed something else — a damper, a blower, a smoke problem, a bird in the flue? We cover all 27 air duct specialties. Call (888) 258-5005 and describe it.
A duct system in SeaTac works through wet winters in a sealed house, often from a damp crawlspace, and increasingly alongside a heat pump. This is what we actually find here, and what we check on every visit.
That stale, damp odor when the heat kicks on is the most common complaint we hear in King County. It traces to dust that has sat in humid ductwork - in crawlspace runs especially - and a trunk-first cleaning clears the source rather than masking it.
Heat pumps are everywhere in Washington now, and they move air more hours of the day than the furnaces they replaced. More fan hours means the dust load in the ductwork gets delivered more often - and filters and ducts both earn attention sooner.
Plenty of SeaTac houses pair an original metal trunk with flex additions from remodels across the decades. Each era collects and leaks differently, returns are often undersized, and an inspection maps the patchwork honestly before anyone proposes work.
Rainy-season living means more indoor hours for people and pets alike in SeaTac, and floor-level returns collect hair and dander steadily through the wet months. It mats inside the return runs, well past where a filter could ever help.
SeaTac sits in King County, and the ZIP list at the bottom of this page covers 5 serviceable ZIP codes — 98148 through 98198. The closest served neighbors are Normandy Park, Des Moines, Burien, and every one of them is covered by the same crews, the same day, under the same number: (888) 258-5005.
Same-day service, free estimates, licensed & insured — and a air duct that lights when you click the remote.
In SeaTac, the usual cause is dust that has sat in damp ductwork - crawlspace runs especially - through the wet months. The first heating cycles deliver that stored smell to every room. A cleaning from the main trunk out clears the source; if the odor returns fast, the inspection checks for wet insulation or a return pulling crawlspace air.
Yes - it removes the indoor reservoir. Smoke particles settled into duct dust keep recirculating at startup after the outdoor air clears across King County. Cleaning the trunk and returns, with a fresh filter, is how most households close out a smoke season indoors.
Rooms that lag the thermostat, long heating cycles, dust returning days after cleaning and weak flow at far registers. Under SeaTac homes, separated crawlspace joints and unsealed returns are the standing findings, and mastic sealing is the lasting fix.
The ductwork is the same, but it works more hours - heat pumps move air gently and often, so a dust load gets delivered more times a day. Keeping the trunk and returns clean, and the returns sealed properly, matters more, not less, behind a heat pump.
It is one of the better first looks you can take. The camera shows what years of wet winters, pets or remodels left inside the system across SeaTac, and you decide from the screen whether a cleaning belongs on the move-in list.
No — and be wary of anyone who does. Every duct system is a different size and condition, so a phone price is a guess that changes at your door. Our inspections and estimates are free: a tech looks inside your actual ductwork first, then gives you one clear price before any work starts.
Air Duct Service Co is a national company with local technicians serving SeaTac street addresses across the ZIP codes below — same-day service and free estimates, every day 8 AM – 8 PM. More of Washington is covered from our Washington page. The SeaTac list below covers 5 ZIP codes, 98148 through 98198.
Don't see your ZIP? SeaTac also uses P.O. Box and single-organization ZIP codes that have no street addresses — call (888) 258-5005 and we will confirm coverage for your street address on the call.
Also serving nearby: Normandy Park, WA · Des Moines, WA · Burien, WA · Tukwila, WA · Kent, WA · Renton, WA.
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