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 Duvall
Air duct cleaning in Duvall typically runs $350 – $650 for a whole-home system, and most jobs are scheduled within a few days of your call. If you’re smelling musty air when the heat kicks on, or you’ve never had your ducts cleaned since buying your place, you’re not alone. Duvall’s mix of 1990s suburban builds and older valley-floor homes means plenty of duct systems out here are hiding decades of dust, moisture damage, and worse.
We dispatch crews to Duvall from our Seattle office, and we know the area well enough to show up prepared. Whether you’re off Main Street in a two-story built during the 2000s boom, or sitting on a 1970s rancher near the Snoqualmie River with original metal ductwork in the crawlspace, we’ve worked on your type of system before. Call us at (361) 326-5060 for a free estimate with a written price before any work starts.
Why Hollis Air Duct Cleaning Is Duvall’s Preferred Air Duct Cleaning Company
We’ve been serving the Snoqualmie Valley since 2004 as part of the Garrison Partners family, and Duvall isn’t a ZIP code we look up on a map. It’s a place where we know to bring extra HEPA filtration and rodent-specific agitation tools after October, because valley-floor crawlspaces here are different than the dry-side suburbs across the lake.
Our technicians are background-checked, uniformed, and expected to follow The Garrison Code on every job: arrive inside the quoted window, price the work in writing before touching anything, complete the job by the book, and leave the site clean. That standard is why Duvall homeowners call us back, and why they refer us to neighbors.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday to get on the schedule.
Every job carries our 365-Day Done Right Promise in writing. If the work fails within a year, we return and make it right at no charge, including a free second visit. That’s not a slogan. It’s on the paperwork.
Residential Air Duct Cleaning in Duvall
Residential Air Duct Cleaning in Duvall means pulling decades of accumulation out of systems that have been fighting the valley’s wet climate since the day they were installed. Most Duvall homes fall into two categories: 1990s – 2010s two-story suburban builds with flexible duct runs and multiple forced-air zones, or older valley-floor farmhouses and 1970s – 80s ranchers with original metal ductwork that’s often leaky, disconnected, or both. We price whole-home residential cleaning at $350 – $550 for typical suburban systems, and $450 – $650 for older homes with crawlspace access issues, extra zones, or rodent contamination requiring source removal and sealing work.
What We Find in Older Valley-Floor Homes
The 1970s ranchers and farmhouses near the Snoqualmie River and along the valley floor are where we see the worst accumulation. Original metal trunks rust at the seams, flexible runs get crushed or pull loose at the boots, and crawlspace moisture pulls straight into the airflow every winter. We run a video inspection first, show you what we’re seeing, and quote the cleaning and any sealing work in writing before we start.
Suburban Two-Story Builds and Zoned Systems
The newer neighborhoods off Cherry Valley Road and around Duvall’s central subdivisions have their own pattern. Multiple zones mean more flexible duct runs, and more places for runs to get kinked behind finished walls or crushed where they turn at the air handler. Weak airflow upstairs is usually a physical obstruction, not a filter problem. We locate it with camera inspection and restore the run without cutting drywall when we can.
Commercial Air Duct Cleaning in Duvall
Commercial Air Duct Cleaning in Duvall covers the small-to-mid-size systems we find in local retail, medical offices, restaurants, and multi-tenant buildings along Main Street and Highway 203. These systems run harder than residential units, often on longer cycles, and they’re subject to the same valley humidity and pollen load that residential systems face. We typically price commercial work at $600 – $1,200 depending on system size, access, and whether kitchen exhaust or grease ducting is involved.
Restaurant and Food-Service Systems
Kitchen exhaust ducts in Duvall’s restaurant spaces need more than a vacuum. Grease accumulation is a fire code issue, and the damp climate here accelerates buildup. We use rotary brush systems and negative-air machines to remove grease and particulate from the full run, not just the accessible sections.
Office and Retail Maintenance Plans
Commercial clients on recurring schedules get priority booking and documented before-and-after photos for their records. We coordinate after-hours when needed, and we price maintenance plans in writing so your facility budget stays predictable.
Trusted Brands We Service in Duvall
Our equipment comes from the same suppliers commercial crews use: Rotobrush rotary brush systems for agitation and debris removal, Nikro negative-air machines for containment during cleaning, and filtration products from Honeywell, Aprilaire, and Guardsman for homes that need upgraded protection after the ductwork is clean. We don’t show up with shop-vacs and extension wands. The tools matter because Duvall’s wet climate and rodent pressure mean half the job is source removal, not just moving dust around. When we recommend a filtration upgrade, we explain exactly what the product does and why it fits your specific system, not a generic pitch.
Common Air Duct Cleaning Problems We See in Duvall Homes
- Mouse nests and acorn caches in valley-floor crawlspace trunks. After the fall harvest and first heavy rains, field mice move in from surrounding farmland and forest edges. We routinely find nests packed into the main supply or return trunk, with acorns scattered through the crawlspace. A standard vacuum-only clean misses this contamination entirely.
- Crushed or disconnected flexible runs in 1990s – 2000s two-story builds. Multiple zones mean more ductwork behind walls and above ceilings. Runs get kinked at the air handler, crushed where they pass through framing, or pulled loose at the boot. The result is weak airflow to upstairs registers and uneven heating that homeowners blame on the furnace.
- Condensation and mold spore accumulation in original metal ductwork. Older farmhouses and ranchers with uninsulated metal trunks in vented crawlspaces see constant condensation during Duvall’s damp winters. The moisture feeds mold growth inside the trunk, and every heating cycle pushes spores into the living space.
- Leaky trunk seams pulling in crawlspace air. Original metal ductwork was never designed to be airtight. Gaps at seams and joints pull raw crawlspace air, moisture, and rodent debris directly into the system. Sealing with mastic is often the real fix, not just cleaning what’s already inside.
Pricing for Air Duct Cleaning in Duvall, WA
Here’s what whole-system air duct cleaning costs in Duvall, with no per-vent pricing games and no invoice that balloons once the van is in your driveway:
| Service | Typical Range in Duvall |
|---|---|
| Whole-home residential cleaning (typical suburban system, 1 – 2 zones) | $350 – $550 |
| Whole-home residential cleaning (older home, crawlspace access, 3+ zones) | $450 – $650 |
| Commercial system cleaning (small retail/office) | $600 – $900 |
| Commercial system cleaning (restaurant with grease exhaust, mid-size) | $800 – $1,200 |
| Duct sealing and reconnection of crushed/disconnected runs | $150 – $400 per run (quoted after inspection) |
| Video inspection (standalone, or included with cleaning) | $125 – $175 |
What moves the price: number of zones and registers, crawlspace vs. attic access, presence of rodent contamination requiring source removal, and whether sealing or reconnection work is needed. We inspect first, write the price down, and that’s the price. No add-ons at the door. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Duvall
Our crews work throughout the Snoqualmie Valley and the eastside corridor. If you’re in Duvall or nearby, we can get to you on schedule: Sammamish, Monroe, Woodinville, and Redmond are all in our regular service area. Dispatch and scheduling are coordinated from our Seattle office, with local crews serving each community.
Serving Duvall, WA - Our Local Coverage Area
We’re based in the Duvall 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 Duvall
Field mice move from surrounding farmland and forest edges into crawlspaces after harvest and the first heavy rains, and the warm metal duct trunks make ideal nesting sites. We find acorn caches and nesting material packed into supply and return trunks, especially in valley-floor homes near the Snoqualmie River. If you hear scratching or smell ammonia when the heat runs, call (361) 326-5060 for an inspection.
It’s almost always a crushed, kinked, or disconnected flexible duct run behind the walls or above the ceiling, not a failing furnace. Multiple-zone suburban builds from that era have long flexible runs that get damaged during construction or settle over time. We locate the obstruction with video inspection and restore airflow without cutting drywall when possible. Call (361) 326-5060 to schedule a camera look.
Yes. Duvall gets roughly 38 – 40 inches of rain annually with cool, damp winters, so ducts here face condensation, mold spore accumulation, and rodent intrusion that dry-side suburbs like Redmond simply don’t see. Cleaning without addressing moisture intrusion or sealing leaky trunks is temporary at best. We inspect for these conditions and quote sealing work in writing when it’s needed.
A standard clean often means a vacuum at the registers and a fog of deodorizer. We use source removal: rotary brush agitation with HEPA-contained negative-air machines, video inspection before and after, and sealing of disconnected or leaky runs. In Duvall, that difference matters because mouse nests, acorn caches, and mold-contaminated trunks need physical removal, not cover-up. Call (361) 326-5060 for an exact quote on your system.
Most Duvall homes benefit from cleaning every 3 – 5 years, but valley-floor homes with crawlspace access issues or known rodent history should be inspected annually. The combination of forest pollen, moss spores, and fall rodent pressure means contamination builds faster here than in drier climates. If you’ve never had your ducts inspected since buying your home, start there. Call (361) 326-5060 for a free estimate.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Duvall since 2004.