Fast, Reliable HVAC Cleaning Across SeaTac
HVAC cleaning in SeaTac typically runs $280-$650 for a complete system service, and most jobs are finished in a single visit. Our HVAC Cleaning crew knows the 98158 ZIP well - from the post-war ranches along 24th Ave S to the split-levels near Angle Lake - and we carry the heavy-duty equipment needed for the oversized systems and sealed-up homes that define this airport town. Call (833) 700-5198 and you’ll reach a live person, day or night.
Why Bellows Air Duct & Vent Co. of Seattle Is SeaTac’s Preferred HVAC Cleaning Company
We’ve been serving homeowners since 2012, and SeaTac has always been part of our route. The aviation workers, hospitality staff, and long-haul truckers who settled here in the fifties and sixties built homes to last - and many of those same families, or their tenants, still live in them today.
Our reputation here rests on one thing: we show up when we say, we show the price before we start, and we leave camera proof of what we found and what we fixed. No bait coupons. No price changes at the door. The number on the phone is the number on the invoice.
Calls are answered by a live person, 24 hours a day. Not a voicemail tree. Not an app. Our technicians are background-checked, uniformed, and equipped with Rotobrush and Abatement Technologies gear - the same brands serious HVAC contractors specify. Most SeaTac jobs wrap in one visit. If something’s not right, our 90-Day Done Right Promise means we return at no charge, no paperwork, no arguing. Colin Merritt, our owner, put that guarantee in writing because he’s stood behind it for over 42 years.
Our HVAC Cleaning Services in SeaTac
Evaporator Coil Cleaning
The evaporator coil is where your system does its hardest work, and in SeaTac it’s fighting an uphill battle. Our 145 wet days per year and sustained marine humidity mean coils here accumulate biological growth faster than in drier parts of the metro. Add the tight envelopes from the Port’s noise insulation retrofits, and that moisture has nowhere to go. We pull the coil, clean it with pressurized foam and HEPA-contained runoff, then treat it with an Abatement Technologies antimicrobial to break the mold cycle. A typical evaporator coil cleaning in SeaTac runs $180-$320.
Blower Cleaning
The blower motor and wheel move every cubic foot of air your home breathes. In SeaTac’s older ranches and split-levels, we’ve found blowers caked with a distinctive gray-black paste - jet particulate mixed with household dust, baked onto the blades by decades of friction. That load strains the motor, raises your power bill, and sends fine particles back into your rooms. We remove the assembly, clean it off-site in a contained wash, and rebalance the wheel before reinstall. Most blower cleanings in SeaTac fall between $220-$380.
Condenser Cleaning
Your outdoor condenser coil faces SeaTac’s constant drizzle, pollen from the Green River valley, and grit from airport service roads. A dirty condenser can’t shed heat, so your compressor runs longer, hotter, and closer to failure. We disassemble the cabinet, straighten fins with precision combs, and flush the coil with low-pressure, high-volume water - never the pressure-washer blast that folds fins flat. Condenser cleaning in SeaTac typically costs $150-$260 as a standalone service, or less when bundled with indoor work.
Air Handler Cleaning
The air handler is the heart of your forced-air system, and in SeaTac’s noise-insulated homes it’s pumping recirculated air through original ductwork that was never designed for a sealed shell. We clean the cabinet, drain pan, and internal surfaces, then inspect with a camera before and after. If the pan’s cracked or the insulation’s degraded - common in 1960s units - we flag it. Air handler cleaning in SeaTac runs $240-$420 depending on accessibility and condition.
Heat Exchanger Cleaning
Furnace heat exchangers in SeaTac’s older housing stock often show corrosion from years of condensation cycling in unconditioned crawl spaces. We inspect for cracks and blockages with a borescope camera - a safety check, not just a cleaning - then remove soot and scale with controlled brushing and vacuum. This is not a homeowner job. A compromised heat exchanger can vent carbon monoxide into your living space. Our heat exchanger service in SeaTac is $200-$350 and includes a written condition report.
Coil Treatment
After cleaning, we apply an EPA-registered antimicrobial treatment to evaporator and condenser coils. In SeaTac’s humidity, this step matters more than in drier climates. The treatment we use, specified by Abatement Technologies, bonds to the metal surface and inhibits mold regrowth for the full cooling season. Coil treatment as an add-on runs $85-$140.
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 SeaTac
We stock parts and specify equipment from Rotobrush, Abatement Technologies, and Aprilaire - brands that HVAC contractors in SeaTac and across King County trust for commercial and residential work alike. That means when your system needs a coil, a filter housing, or a treatment product, we’re not ordering it from a warehouse three states away. We carry it. Your downtime shrinks. And because we know the local housing stock - the Carrier units common in 1970s split-levels, the Goodman systems landlords install in converted rentals - we arrive with the right fitments already on the truck. No second trip. No waiting.
Common HVAC Cleaning Problems We See in SeaTac Homes
- Jet-exhaust particulate trapped in sealed ductwork. SeaTac is the only city in the metro where homes inside the Port of Seattle’s Noise Insulation Program - retrofitted with sealed envelopes and new windows - still circulate original ductwork laden with ultrafine jet-exhaust particulates, a documented IAQ hazard absent in neighboring Burien, Tukwila, or Des Moines. Those sealed-up houses now recirculate that contamination with far less dilution from outside air.
- Condensation damage in unconditioned crawl spaces. SeaTac’s 145 wet days per year and sustained high ambient humidity, combined with prevalence of vented crawl-space foundations, means duct runs regularly experience condensation cycles that promote mold colonization and debris accumulation. This worsens in tightly sealed noise-insulated homes where moisture has fewer exit paths.
- Deferred maintenance in high-turnover rental units. The hospitality and airport-service economy creates high rental-unit density in SeaTac’s 98158 core, with frequent tenant turnover and chronically deferred duct maintenance. We often find filters unchanged for years and coils choked with lint and grease from portable cooking appliances.
- Original galvanized ductwork past its service life. The 1950s-1970s post-war ranches and split-levels that define SeaTac’s residential core were built with galvanized or early flex ductwork that rusts, separates at joints, and accumulates debris in low-velocity runs. Cleaning reveals the damage; our camera shows you exactly what you’re breathing through.
Pricing for HVAC Cleaning in SeaTac, WA
Here’s what HVAC cleaning costs in SeaTac’s market:
| Service | Typical Range in SeaTac |
|---|---|
| Evaporator Coil Cleaning | $180 - $320 |
| Blower Cleaning | $220 - $380 |
| Condenser Cleaning | $150 - $260 |
| Air Handler Cleaning | $240 - $420 |
| Heat Exchanger Cleaning | $200 - $350 |
| Coil Treatment (add-on) | $85 - $140 |
| Complete System HVAC Cleaning | $280 - $650 |
Three things move your price: how many components need attention, how accessible your system is (crawl-space work takes longer), and how long it’s been since the last cleaning. A system cleaned five years ago costs less than one neglected for twenty. We disclose your exact price before we lift a single tool - no bait, no changes at the door. Seniors and veterans receive a permanent 5% discount. Call (833) 700-5198 for a free estimate.
We Also Serve Cities Near SeaTac
Our service radius covers SeaTac and the surrounding communities - Normandy Park to the west, Tukwila to the north, Boulevard Park along the Duwamish, and Riverton to the south. Same trucks, same technicians, same upfront pricing. If you’re near the airport, you’re near us.
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 - HVAC Cleaning in SeaTac
Yes. SeaTac is unique because thousands of its residential properties sit inside the Port of Seattle’s active Noise Insulation Program footprint around Sea-Tac Airport - homes that were retrofitted with tighter envelopes and new windows but often retain original duct systems. Those sealed-up houses now recirculate ultrafine jet-exhaust particulates with far less dilution from outside air, making duct contamination a documented IAQ concern that is specific to this airport-host city and not shared by neighboring Burien, Tukwila, or Des Moines. On a recent job off 24th Ave S in the 98158 ZIP, we found a 1960s ranch whose Port-sealed shell trapped condensation and Jet-A residue inside unlined galvanized duct. Our Rotobrush system purged decades of debris, and we applied an Abatement Technologies antimicrobial coil treatment to stop the mold cycling. The homeowner told us the air felt thinner for the first time in twenty years. Call (833) 700-5198 if your home is in the program footprint - we’ll inspect and show you exactly what’s inside your ducts.
Many SeaTac acreage properties have detached workshops, oversized systems, and longer service drives that require heavier-duty equipment and larger vacuum capacity than standard residential jobs. We bring commercial-grade Rotobrush and Abatement Technologies systems with extended hose runs and higher CFM ratings to handle these properties in one trip, not two. Our trucks are stocked for the job. Call (833) 700-5198 and tell us about your setup - we’ll make sure we arrive ready.
Every 3-5 years for noise-insulated homes in SeaTac, versus the typical 5-7 year interval for standard construction. The sealed envelope that keeps jet noise out also keeps contaminants in, and with no passive dilution, particulate loads build faster. Homes with pets, smokers, or respiratory-sensitive occupants should consider shorter intervals. We offer $89 Seasonal Tune-Ups that include a camera inspection of your ductwork so you know where you stand. Call (833) 700-5198 to schedule.
Yes, but only as part of a broader moisture strategy. Cleaning removes mold colonies and organic debris that feed humidity-related problems, and our coil treatments inhibit regrowth. However, if your crawl space has standing water or failed vapor barriers, we flag that during our camera inspection and can refer you to crawl-space specialists we trust. For the duct-specific piece, we’re the right call. Free estimates at (833) 700-5198.
We specify Rotobrush for mechanical agitation, Abatement Technologies for HEPA containment and antimicrobial treatments, and Aprilaire for filtration upgrades. These are the brands serious HVAC contractors in SeaTac and King County use in their own work. We don’t show up with shop-vacs and hope. Call (833) 700-5198 for a free estimate - we’ll explain exactly what equipment suits your system before we start.
Ready to see what’s inside your ducts? Call Bellows Air Duct & Vent Co. at (833) 700-5198 for a free, no-obligation estimate. We’ll answer live, schedule at your convenience, and show up with the right equipment for your SeaTac home - whether it’s a 1960s ranch off 24th Ave S, a noise-insulated split-level near Angle Lake, or an acreage property with heavy-duty demands. One honest price, shown before we start. Camera proof when we’re done. And if it’s not right, we make it right - no paperwork, no arguing, for 90 days.
Written by Colin Merritt, Owner at Bellows Air Duct & Vent Co., serving SeaTac and the greater Seattle area since 2012.