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.
Before
After
Before
After
Before
AfterFast, Reliable Air Duct Cleaning Across Cottage Lake
Air duct cleaning in Cottage Lake typically runs $350 – $650 for a full residential system, and our crews schedule within a few days of your call. If your registers smell musty, your airflow feels weak, or your allergy symptoms spike every spring, your ducts are probably pulling in more than air.
We serve Cottage Lake from our Seattle office, and we know this area well. The mature Douglas fir canopy, the damp air rolling off the Sammamish Valley, and the 1970s – 1990s housing stock with original flex duct in attics and crawlspaces create a specific set of problems that generic duct cleaners miss. Our Air Duct Cleaning team has worked on homes near Cottage Lake Elementary, along Avondale Road, and throughout the neighborhoods tucked between the lake and the valley. We arrive inside the quoted window, price the job in writing before we touch anything, and leave the site clean. Call (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Cottage Lake’s Preferred Air Duct Cleaning Company
Hollis has been part of the Garrison Partners family since 2004. That track record matters in a trade where fly-by-night operators offer a $99 coupon, then upsell you to $800 once they’re in your basement. We don’t work that way.
Every job gets a written price before work starts. The number does not move at the door. Every repair and cleaning is backed by our 365-Day Done Right Promise: if the work fails within a year, we come back and make it right at no charge, including a free second visit. Our technicians are background-checked, uniformed, and expected to follow The Garrison Code on every job: arrive inside the window, price in writing, complete the work by the book, and leave the site clean.
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.
Vent Cleaning in Cottage Lake
Vent Cleaning in Cottage Lake means more than wiping down register covers. The supply and return vents throughout your home are where debris first enters the living space, and in this area they’re often coated with a stubborn layer of fir pollen, dust, and microbial film from the humid marine climate. We remove each vent cover, clean the boot and first few feet of duct behind it with rotary brush agitation and negative-air extraction, then replace everything. Most Cottage Lake homeowners need this every two to three years, though homes with ground-level fresh-air intakes may need annual attention. Expect $150 – $280 for vent cleaning as a standalone service, or it’s included in a full system clean.
Supply Vent Cleaning
Supply vents push conditioned air into your rooms. When they’re clogged with pollen and dust, your HVAC system works harder and your air smells stale. We clean the vent cover, the boot, and the accessible duct run behind it.
Return Vent Cleaning
Return vents pull air back to the handler. They’re your home’s primary air intake points and they collect the most debris. In Cottage Lake, we often find these packed with pet hair, pollen, and fine particulate from the forest canopy.
Air Duct Repair in Cottage Lake
Air Duct Repair in Cottage Lake addresses the sagging, torn, and rodent-damaged flexible ductwork common in the area’s 1970s – 1990s homes. Original flex ducts in attics and crawlspaces degrade from heat cycling, moisture, and pest activity. Gaps and disconnects blow conditioned air into unused spaces and pull in crawlspace air full of mold spores and rodent waste. We inspect with a video camera, then repair or replace damaged sections with sealed, insulated ducting. Typical repairs run $200 – $500 for localized fixes; full duct replacement in an average Cottage Lake home runs $1,500 – $3,500. Every repair carries the 365-Day Done Right Promise.
Duct Sealing and Reconnection
Disconnected or poorly sealed ducts leak air and draw in contaminants. We use duct sealing mastic and mechanical fasteners to restore airtight connections, then test airflow at the registers to confirm the fix.
Video Inspection Before Repair
We feed a camera through the system so you see what we see: the sag, the tear, the rodent damage, or the blockage. No guesswork. No unnecessary work.
Trusted Brands We Service in Cottage Lake
We clean and service systems using professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, the same tools commercial crews rely on. For filtration upgrades, we stock and install Honeywell, Aprilaire, and Guardsman products. We keep common parts and filters on our vans, so most Cottage Lake jobs are completed in a single visit without waiting on a parts run to Seattle.
Common Air Duct Cleaning Problems We See in Cottage Lake Homes
- Clogged exterior fresh-air intakes. Many Cottage Lake homes have ground-level intakes that suck in fir needles, pollen, and moss from the surrounding canopy. If the intake isn’t cleaned with the ducts, recontamination happens within weeks.
- Mold and mildew in attic and crawlspace duct runs. The mild, wet marine climate here keeps those spaces cool and damp. Microbial growth thrives on the organic debris that collects in older flex ducts, especially where they sag and hold condensation.
- Sagging original flexible ductwork. The 1970s – 1990s ranch and two-story homes that dominate Cottage Lake often have flex ducts that have collapsed in sections, creating airflow dead zones and forcing the HVAC system to overwork.
- Neglected HRV/ERV systems in newer custom builds. These ventilation systems have separate filters and cores that need their own cleaning. Skipping them leaves a complete pathway for pollen and moisture to keep circulating.
Pricing for Air Duct Cleaning in Cottage Lake, WA
Most full residential air duct cleaning jobs in Cottage Lake fall between $350 and $650 for a typical single-system home. Larger homes, homes with multiple HVAC zones, or systems with significant contamination may run higher. Commercial duct cleaning starts around $800 and scales with square footage and system complexity.
What moves the price: the number of supply and return vents, whether we need to clean exterior fresh-air intakes and dampers (common here and necessary for a complete job), the condition of the ductwork, and whether video inspection reveals damage requiring repair. We do not quote per-vent pricing, and we do not bait you with a teaser rate. You get one flat price per system, agreed in writing, before any work begins. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Cottage Lake
Our crews work throughout the region, including Cottage Lake and surrounding communities. We also schedule jobs in Seattle, Spokane, Tacoma, and Vancouver. Dispatch and scheduling are coordinated from our Seattle office.
Serving Cottage Lake, WA - Our Local Coverage Area
We’re based in the Cottage Lake 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 Cottage Lake
Cottage Lake’s dense canopy of Douglas firs, big-leaf maples, and cottonwoods produces massive pollen loads each spring, and many homes draw fresh air through ground-level intakes that clog with needles and moss. The humid marine climate then traps that organic debris in cool, damp duct runs where mold grows. Most homeowners here benefit from cleaning every two years, and some with ground-level intakes need annual service. Call (361) 326-5060 to discuss your home’s specific setup.
A real duct cleaning uses source removal: mechanical agitation with rotary brushes and negative-air machines to physically extract debris, pollen, and microbial growth from the duct walls. A fogging sanitiser simply mists a chemical into the ducts without removing anything. In Cottage Lake’s humid environment, fogging masks odor temporarily but leaves the damp fir needles, pollen, and mold food exactly where they were. We do not offer fogging as a standalone service because it does not solve the problem. Call (361) 326-5060 for a source-removal quote.
Yes, and in Cottage Lake we consider it essential. Many local homes have intakes near ground level that are packed with fir needles and moss. If we clean the ducts but skip the intake, the system immediately recontaminates. Our full system cleaning includes intake and damper inspection and cleaning. Call (361) 326-5060 to schedule.
Yes. Heat recovery ventilators and energy recovery ventilators have their own filters, cores, and duct runs that bypass the main HVAC system. In newer Cottage Lake custom builds, these systems are common and they collect the same pollen and moisture. We clean HRV/ERV filters and cores as a separate service, typically $120 – $220. Call (361) 326-5060 to add this to your appointment.
Cottage Lake’s 35 – 40 inches of annual rainfall and high humidity keep attic and crawlspace duct runs cool and damp for much of the year. When organic debris accumulates in those conditions, mold and mildew colonize quickly. Source removal cleaning extracts that debris and the moisture it holds, which is why fogging alone fails here. Call (361) 326-5060 for an inspection if you smell mustiness from your registers.
We recently cleaned a 1980s two-story home near Cottage Lake Elementary that had a clogged exterior fresh-air intake packed with fir needles and moss, causing weak airflow at the registers. Our tech used a camera inspection to confirm the blockage, then performed source removal with negative pressure and agitation tools, including cleaning the intake and the original flexible ductwork in the attic. The homeowner reported immediate improvement in airflow and less musty odor.
Many Cottage Lake homes draw fresh air through ground-level exterior intakes and exterior dampers that suck in fir needles, pollen, and moss from the surrounding Douglas fir and cottonwood canopy, so a genuine duct clean must include cleaning those intakes to prevent immediate recontamination; neighboring cities without this forest interface rarely see this exact pattern. The fogging sanitiser upsell that some competitors push only masks odor. It does not remove the damp fir needles, pollen, or microbial growth that thrive in the cool, humid crawlspace and attic runs. And skipping the exterior intake during cleaning, which is common with cut-rate services, guarantees rapid recontamination of the supply and return ducts. In newer custom homes with HRV/ERV systems, neglecting the separate filter and core cleaning leaves a complete alternate pathway for pollen and moisture to keep circulating.
Ready to see what’s in your ducts? Call (361) 326-5060 for a free estimate. We’ll give you a written price before any work starts, and every job is backed by our 365-Day Done Right Promise.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Cottage Lake since 2004.