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 HVAC Cleaning Across Seattle
HVAC cleaning in Seattle means pulling years of dust, pet dander, and construction debris from your air handler, blower motor, evaporator coil, and the ducts that carry conditioned air through your home. Most standard whole-system cleanings in Seattle run $450 – $800 for a typical single-family house, and we hand you a written price before a single vent cover comes off. No per-vent pricing. No surprise upcharges once the van is parked outside. If you live anywhere from Ballard to Rainier Beach, call us at (737) 727-2314 and we’ll walk you through exactly what your system needs.
Seattle homes are specific. The marine air, the long heating season, the 1920s craftsman bungalows with retrofitted ductwork, the 1990s suburban builds with flex runs strung through crawlspaces. We know what hides in those systems because we’re in them every week.
Why Cardinal Air Duct Cleaning Is Seattle’s Preferred HVAC Cleaning Company
Cardinal Air Duct Cleaning is part of the Relay Home Co. family, founded in 2005, and every Seattle job runs under the Relay Standard: a live trackable arrival window, before-and-after photo proof of your own ducts, and a digital invoice you can pay from your phone. You’ll know your technician’s name before they knock. Omar Haddad leads the team, and the standard he holds is simple: the written price is the price. Period.
Seattle homeowners have told us the same thing for years: they hate the bait-and-switch. A coupon arrives, the crew shows up, and suddenly the “cheap” duct cleaning triples because the house has a finished basement or older trunk lines. That doesn’t happen here. We quote one flat price per system after a camera inspection, and it doesn’t move. Our 365-Day Done Right Promise backs every job: if the work isn’t right within a full year, we come back and correct it at no charge.
Our technicians arrive in uniform, background-checked, running professional-grade equipment: Rotobrush rotary brush systems for source removal, Nikro HEPA vacuums for negative pressure, and Abatement Technologies containment units when a Seattle job calls for it. This is not a shop-vac in a pickup truck.
AC Vent Cleaning in Seattle
AC vent cleaning in Seattle focuses on the supply registers, return grilles, and the first few feet of duct connected to them, where visible dust, pet hair, and residue build up fastest. In Seattle, where homes stay closed up against cool damp air for much of the year, the AC vents see constant recirculation of whatever’s inside your system. The cost for cleaning all vents in a standard Seattle home typically runs $120 – $250, but we don’t price per vent. We price the system as a whole, so you know the total before we start.
Register and Grille Build-Up
Every register in the house accumulates a film of dust and often a rim of sticky residue from cooking oils or candles. HVAC Cleaning crews who skip this step just blow loosened debris back through the grille. We remove each register, clean it on site, and photograph the opening before and after. In older Seattle homes near Green Lake or in Capitol Hill, we routinely find registers that have never been removed since installation.
Supply Duct Reach Cleaning
Reaching the first few feet of each supply run catches what register cleaning alone cannot. Pet hair, hair, and dust gather where air slows at the edges of the duct. We run a flexible brush from the register opening back toward the trunk line, then the HEPA vacuum pulls the loosened material out. You’ll see the interior in the before-and-after photos we send to your phone.
Furnace Duct Cleaning in Seattle
Furnace duct cleaning in Seattle addresses the entire network of supply and return ductwork, the trunk lines, and the plenum connected to your furnace or heat pump air handler. Seattle’s long heating season means the furnace or heat pump runs daily for months, pushing air through the same dusty ductwork every cycle. A full furnace duct cleaning on a standard Seattle home runs $450 – $800, and every job starts with a camera inspection so we know exactly what we’re cleaning and what condition the ducts are in.
Trunk Line and Plenum Work
The plenum and main trunk lines are where Seattle’s damp air meets household dust. Over years, that coating becomes a paste that bakes onto the metal. We use negative-pressure extraction with HEPA filtration, then run the Rotobrush through the trunk lines to pull source material free. The loosened debris goes straight into the vacuum, not back into your living room.
Return-Side Cleaning and Sealing
Seattle return ducts pull air back to the air handler from every room. In many Ballard and Fremont remodels, returns were added or moved during renovations, and we regularly find disconnected or crushed flex runs that mean the cleaned air never reaches the intended room. Our camera inspection catches this before cleaning, and we’ll show you the footage. When needed, we can seal accessible joints so the system stops pulling dust from crawlspaces and wall cavities.
Trusted Brands We Service in Seattle
Seattle homes run a mix of legacy gas furnaces, electric air handlers, and the growing wave of heat pumps and mini-splits. We service and clean them all: Trane, Carrier, Lennox, Rheem, Goodman, Mitsubishi, Daikin, Bryant, and more. Our service vehicles stock common filters, access panels, and coil-treatment supplies so we don’t have to leave a Seattle job half-finished to chase a part. If your system uses Aprilaire or Guardsman filtration products, we stock those too, and we’ll swap them in during your cleaning if the current filter needs replacing.
Common HVAC Cleaning Problems We See in Seattle Homes
- Retrofit duct reuse on heat pump conversions. Seattle’s energy code now pushes most single-family homes toward heat pumps when a furnace dies. The old gas furnace comes out, a new air handler goes in, and the 1950s or 1970s ducts get reused as-is. Those ducts were sized and sealed for a different system, and they usually carry decades of accumulated debris into the new equipment.
- Musty smells in older neighborhoods. Walls of dust and pet dander inside ducts absorb Seattle’s damp air and hold it. That’s the musty smell that returns a day after you scrub the bathroom. The fix is removing the source material, not masking it.
- Disconnected flex runs from remodels. Seattle’s older housing stock has been renovated in waves since the 1980s. We find flex duct that was pulled loose during a remodel and left dangling, so conditioned air dumps into the crawlspace while the room above stays cold.
- Construction debris in newer builds. Builders in Seattle don’t protect ducts during drywall and finish work. Sawdust, drywall mud, paint overspray, and even soda cans end up in the supply runs. We find this in homes from West Seattle to Madison Park, and it’s why a camera inspection before cleaning matters: you see what’s actually inside before you pay to remove it.
Pricing for HVAC Cleaning in Seattle, WA
A full HVAC system cleaning in Seattle runs $450 – $800 for a typical single-family home, which includes the air handler, blower motor, evaporator coil, and all supply and return ducts. AC vent cleaning alone runs $120 – $250. What moves the number: the number of systems (a house with two furnaces or a heat pump plus an ERV costs more), the square footage of ductwork, and whether your home has a finished basement or hard-to-access crawlspace. We set one flat price per system after camera inspection, and that price doesn’t change at the door. Call (737) 727-2314 for a free estimate: we’ll ask a few questions about your home, give you a real number, and schedule a time that works.
Seattle’s energy landscape is shifting faster than most cities. Since 2022, the city’s code has required most existing single-family homes to decommission natural gas or electric-resistance furnaces at the point of replacement. That’s driving a wave of heat-pump and mini-split retrofits across neighborhoods like Wallingford, Maple Leaf, and Beacon Hill. Many of those retrofits reuse the existing supply and return ducts. That means cleaning and sealing legacy ductwork isn’t optional anymore: it’s the difference between a heat pump that performs and one that fights a decade of debris in the lines.
We were called out to a 1926 craftsman in Wallingford where the homeowners had just swapped a gas furnace for a heat-pump air handler. Camera inspection showed the original 1950s supply and return ducts lined with decades of dust, pet hair, and construction debris from the retrofit. Our tech ran negative pressure with HEPA filtration, used agitation tools and a Rotobrush to pull source removal material from the trunk lines, then cleaned and sanitized the air handler and blower motor housing. The before-and-after photographs showed a visibly clean duct interior, and the owner said the musty smell that had lingered in the back bedroom was gone.
We Also Serve Cities Near Seattle
Beyond Seattle, our crews cover Medina, Bellevue, Mercer Island, and Kirkland, where the housing stock and humidity patterns run close to what we see in Seattle proper. If you’re just outside city limits, the same flat per-system pricing and 365-Day Done Right Promise apply. Call (737) 727-2314 and we’ll confirm coverage for your address.
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 HVAC Cleaning in Seattle
Most Seattle homes need genuine HVAC duct cleaning every 3 to 5 years. That’s not a marketing number; it’s based on what our camera inspections actually show: how much debris has accumulated, whether pets live indoors, whether the home has been renovated, and how old the ductwork is. A newly built home that never saw construction debris may go longer. A 1920s craftsman with reused 1950s ducts after a heat pump retrofit may need it immediately. We’ll tell you honestly if your ducts don’t need cleaning yet. Call (737) 727-2314 to schedule a camera inspection first, not a cleaning.
Camera inspection shows us and you exactly what’s inside your ducts before any work starts, and it catches problems cleaning alone can’t fix: disconnected flex runs, crushed pipe, failed tape at joints, or debris the size of a soda can. In Seattle, where finished basements and 1950s octopus ductwork are common, skipping the inspection is how per-vent bait-and-switch crews surprise you with charges for access they didn’t plan for. Our price is based on what the camera shows. That’s the only honest way to quote a Seattle duct job.
It can, and the reason is straightforward: Seattle’s damp marine air gets absorbed by the dust, pet dander, and organic debris already coating your ducts, and that’s what holds the musty smell. Removing the source material – not spraying a deodorizer over it – is what actually changes the air. For seasonal allergies, cleaning removes accumulated pollen and mold food from the system, though we recommend pairing it with a better filter, like an Aprilaire media filter, if anyone in the house has serious allergies. Call (737) 727-2314 and we’ll help you figure out what’s worth doing.
Yes, in almost every Seattle case, and here’s why: the old furnace was replaced because it died, not because the ducts were clean. The ducts that served it for decades still hold all the debris they always held, plus whatever the retrofit knocked loose. A new variable-speed heat pump air handler is also more sensitive to airflow restriction than an old single-speed furnace, so dirty coils and clogged ducts hurt efficiency more. Have the ducts camera-inspected before you run the new system for a season. Call (737) 727-2314 and we’ll schedule the inspection.
We do not price per vent in Seattle. Our pricing is one flat rate per system, set after a camera inspection, and handed to you in writing before any work starts. Per-vent pricing is the classic bait-and-switch mechanic in this trade: a low teaser number per vent that becomes a huge total once the crew counts every register in a finished basement. A typical Seattle single-family home with one HVAC system costs $450 – $800 for a complete cleaning, no matter how many vents the house has. Call (737) 727-2314 for an exact quote, free.
Written by Omar Haddad, Owner at Cardinal Air Duct Cleaning, serving Seattle.