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 Snohomish
Air duct cleaning in Snohomish typically runs $350 – $750 for a full residential system, and most jobs are scheduled within a week of your call. We’re familiar with the specific challenges of Snohomish homes, from the 1890s Victorians along First Street to the hillside subdivisions off Blackmans Lake Road. Our Air Duct Cleaning crews dispatch from our Seattle office and carry the Rotobrush and Nikro equipment needed for both historic unlined metal ductwork and modern flex systems. Call (361) 326-5060 for a free estimate.
Snohomish sits in the Snohomish River Valley, where fall and winter river fog keeps indoor humidity high for weeks. That moisture doesn’t stay in the air; it settles into duct systems, especially the original galvanized runs in the historic downtown and riverfront neighborhoods. We’ve learned that duct cleaning here is as much about moisture control and sanitizing as it is about dust removal. Generic cleaning crews who don’t understand this cycle often leave mold viable on every surface, and the musty smell returns within a month.
Why Hollis Air Duct Cleaning Is Snohomish’s Preferred Air Duct Cleaning Company
We’ve been part of the Garrison Partners family since 2004, and our Snohomish customers return because we show up inside the window, price the job in writing before we touch anything, and leave the site clean. The Garrison Standard isn’t a slogan; it’s a checklist. Arrive on time. Write the price down. Complete the job by the book. No exceptions.
Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. And when you call (361) 326-5060, a live person answers the phone, 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday for a scheduling question.
Every job carries our 365-Day Done Right Promise in writing. If the work fails within a year, we come back and make it right at no charge, including a free second visit. That’s not common in this trade. Most competitors offer a 30-day verbal assurance, if anything.
We know Snohomish’s housing stock. The 1890s – 1920s Victorians and Craftsmen along Avenue D, Cedar Avenue, and the riverfront often have original unlined metal ducts that were never designed to be sealed. The 1970s – 1990s tracts on the hillsides above town run flex duct that degrades differently. We adjust our approach for each, and we explain what we’re doing in plain terms while we work.
Residential Air Duct Cleaning in Snohomish
Residential Air Duct Cleaning in Snohomish addresses the full supply and return network in your home, from the air handler to each register, using either rotary brush or negative-air methods depending on your duct material and contamination level. A typical single-family home in Snohomish runs $350 – $550 for a standard cleaning, $550 – $750 if we find significant mold, rodent debris, or disconnected runs requiring sealing and sanitization. Homes in the historic downtown and riverfront zones often land in the upper range because of the unlined metal ductwork and persistent moisture issues.
Supply and Return Duct Cleaning
Supply ducts push heated or conditioned air into your rooms; return ducts pull air back to the air handler. We clean both, because dirty returns recontaminate clean supplies immediately. In Snohomish’s older homes, we frequently find return ducts pulling from musty crawlspaces or wall cavities instead of proper return grilles, which we flag and discuss with you before proceeding.
Video Inspection Before and After
We run a camera through your main trunk lines before we start and after we finish. You see what we see. In Snohomish, this often reveals disconnected joints, standing water from crawlspace seepage, or rodent activity in the original metal runs. The after-video confirms the debris is gone and the joints are sealed.
Commercial Air Duct Cleaning in Snohomish
Commercial Air Duct Cleaning in Snohomish covers office buildings, retail spaces, restaurants, and multi-unit properties along First Street, Pine Avenue, and the commercial corridors near the river. A typical commercial system in Snohomish runs $800 – $2,500 depending on square footage, duct accessibility, and whether the building has a shared HVAC plant or individual package units. We schedule around your business hours to minimize disruption.
Multi-Unit and Shared Systems
Many downtown Snohomish commercial buildings and apartment conversions share supply and return plenums between units. Cleaning one without addressing the common trunk lines just moves debris around. We map the system first, clean the common areas, then address individual unit branches with containment barriers in place.
Post-Construction and Renovation Cleaning
Snohomish’s historic building renovations kick up decades of plaster dust, lead paint particles, and modern construction debris that settles into ductwork. We use HEPA-contained negative-air machines from Nikro to capture fine particulate that standard vacuums recirculate. This matters in older buildings where occupants may already have respiratory sensitivities.
Trusted Brands We Service in Snohomish
Our equipment roster includes Rotobrush rotary brush systems for light to moderate residential buildup, Nikro negative-air machines for heavy contamination and commercial jobs, and filtration products from Honeywell, Aprilaire, and Guardsman. We don’t show up with hardware-store shop vacs and call it duct cleaning. The Rotobrush’s rotating bristle head loosens debris from duct walls while a high-powered vacuum pulls it into a sealed containment unit. The Nikro systems create suction throughout the entire duct network, which is critical for the unlined metal runs in Snohomish’s historic homes where brush contact alone won’t reach every gap. We stock common replacement filters and media locally, so if your system needs a filter upgrade after cleaning, we can handle it on the same visit without a return trip.
Common Air Duct Cleaning Problems We See in Snohomish Homes
- Mold and musty odors in river-valley homes: The Snohomish River fog keeps crawlspace and duct humidity above 60% for weeks each fall and winter. We regularly find surface mold on the interior of unlined metal ducts in the historic downtown, where the galvanized steel provides an ideal attachment surface.
- Disconnected runs in pre-1920s construction: Original gravity ducts and early forced-air conversions used simple slip joints with no sealing. Decades of vibration, settling, and rodent pressure pop these apart. Our crew was called to a 1908 Craftsman on Avenue D near the Snohomish River waterfront after the homeowner noticed a musty smell every time the furnace kicked on. We ran a camera inspection and found the original unlined supply and return ducts had disconnected at two joints under the floor, with rodent debris and surface mold along the interior of the runs. We sealed the joints, HEPA-vacuumed under negative pressure with the Rotobrush, and applied a sanitizer – the musty odor cleared within a day.
- Shared dryer vent stacks in downtown apartments and condos: Dense housing near the historic core often routes multiple units through a single vertical duct. Lint accumulates in the common run, restricting airflow for every unit and creating a fire hazard. We clean the full stack from roof to basement with rotary tools and verify flow at each connection.
- Flex duct degradation in hillside tracts: The 1970s – 1990s subdivisions off Blackmans Lake Road and north of town used flexible ductboard and flex hose that collapses, tears, or fills with water if the crawlspace drains poorly. We inspect for these failures before cleaning and recommend replacement where the duct is structurally compromised.
Pricing for Air Duct Cleaning in Snohomish, WA
Here’s what air duct cleaning costs in the Snohomish market:
| Service | Typical Range |
|---|---|
| Standard residential full-system cleaning (single-family, modern flex duct) | $350 – $550 |
| Historic home with unlined metal duct, sealing, and sanitization | $550 – $750 |
| Commercial system, small to medium (up to 5,000 sq ft) | $800 – $1,500 |
| Commercial system, large or multi-unit shared plant | $1,500 – $2,500 |
| Dryer vent cleaning (single-family) | $120 – $180 |
| Dryer vent stack cleaning (multi-unit, per stack) | $300 – $500 |
| Video inspection only | $150 – $250 |
What moves you within these ranges: duct material and accessibility, contamination level, whether sealing or sanitization is needed, and whether we find disconnected runs requiring repair before cleaning. We write the price down before any work starts, and it does not move at the door. No per-vent pricing, no add-on surprises. Call (361) 326-5060 for a free estimate – we’ll ask about your home’s age, location in Snohomish, and any symptoms you’ve noticed, then give you a firm range before we schedule.
We Also Serve Cities Near Snohomish
Our Air Duct Cleaning in Snohomish crews also handle jobs in Monroe, Mill Creek, Lake Stevens, and Everett. Each community has its own housing stock and climate quirks – Monroe’s flood-plain moisture, Mill Creek’s newer construction with tighter envelopes, Lake Stevens’ lake-effect humidity, Everett’s industrial legacy and particulate load. We adjust our approach for each, but the standard stays the same: written price, written guarantee, job done by the book.
Serving Snohomish, WA - Our Local Coverage Area
We’re based in the Snohomish 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 Snohomish
The Snohomish River Valley traps fog and holds humidity 15 – 20% higher than the hillside tracts above town for weeks at a time. That moisture condenses on the interior of ductwork, especially the original unlined metal runs in historic downtown homes, creating the damp surface mold needs. Homes on the hillsides with newer flex duct and better drainage dry faster and rarely develop the same persistent musty smell. If you’re in the valley and smelling must when the furnace kicks on, call (361) 326-5060 – we can run a camera inspection and show you exactly what’s growing in there.
Yes. We’ve cleaned systems in the converted historic buildings along First Street and Avenue D where street parking is restricted and doorways are 28 inches wide. Our Nikro negative-air machines break down for carry-in, and we coordinate with building management for loading zone access or after-hours entry. We schedule a walk-through first if access is unusual, so we’re not figuring it out on your clock. Call (361) 326-5060 to discuss your building’s specific constraints.
We clean the full vertical stack from the roof cap to the basement connection, using rotary brushes and high-velocity air tools to dislodge lint buildup that affects every unit. We then verify airflow at each branch connection and provide documentation for your HOA or property manager. Skipping the common stack and cleaning only individual unit connections leaves the fire hazard intact and the airflow restriction unresolved. Call (361) 326-5060 for a stack inspection and quote.
Very likely. The original unlined metal ducts in 1890s – 1920s homes along the riverfront were joined with simple slip fittings and no sealing mastic. Decades of thermal expansion, vibration, and rodent activity pop these apart. Our camera inspection finds them before we clean, and we seal with proper mastic and mechanical fasteners before running the Rotobrush. Cleaning without sealing first just blows debris into your crawlspace and lets fog-season moisture re-contaminate the system within weeks. Call (361) 326-5060 to schedule an inspection.
Not for a standard duct cleaning, but we do inspect the blower compartment and evaporator coil for contamination that would re-soil clean ducts immediately. If the blower wheel or coil is heavily fouled with mold or dust, we’ll show you with the camera and quote the additional work separately before proceeding. In Snohomish’s damp climate, we see more coil mold than drier inland markets, so this inspection is standard on every job. Call (361) 326-5060 for an exact quote – estimates are free.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Snohomish since 2004.