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.
Fast, Reliable Air Duct Cleaning Across Union Hill-Novelty Hill
Air duct cleaning in Union Hill-Novelty Hill typically runs $350 – $650 for a full residential system and is scheduled by appointment, not dispatched as an emergency. Our crews cover the full area from Redmond Ridge to the rural stretches off Novelty Hill Road, and scheduling is coordinated from our Seattle office with local technicians who know the difference between a 1990s flex-duct rural property and a newer heat-pump build. Call (361) 326-5060 for a written estimate before any work starts.
We’ve been cleaning ductwork in Union Hill-Novelty Hill long enough to know the local pattern: homes backing onto wooded acreage or horse pasture don’t have a dust problem, they have a contamination-intrusion problem. Cedar pollen, fir needles, and field mice storing dry grass in flex runs – that’s what we’re actually removing. Our Air Duct Cleaning team uses Rotobrush rotary systems and Nikro negative-air machines with HEPA filtration, the same equipment commercial crews run, and every job gets a written price upfront and our 365-Day Done Right Promise in writing.
Why Hollis Air Duct Cleaning Is Union Hill-Novelty Hill’s Preferred Air Duct Cleaning Company
Union Hill-Novelty Hill sits on the suburban-rural edge of King County where the housing stock splits two ways: large-lot custom homes from the 1980s-2000s with long, complex duct runs, and newer high-efficiency builds with heat pumps and tight envelopes. We’ve cleaned both. Our technicians are background-checked, uniformed, and expected to operate by The Garrison Code: arrive inside the window, price in writing, complete the job by the book, 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. When you schedule in Union Hill-Novelty Hill, you get a real appointment window, not a 6-hour wait. We’ve built our reputation here on showing up when we said we would and charging what we wrote down – not the lowest teaser price that balloons once the van is in your driveway.
Our 365-Day Done Right Promise covers every job 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 satisfaction guarantee; that’s a specific, dated commitment you can hold us to. In a market full of coupon cutters who disappear after the invoice is paid, we think that’s worth more than a percentage off.
Commercial Air Duct Cleaning in Union Hill-Novelty Hill
Commercial Air Duct Cleaning in Union Hill-Novelty Hill covers office parks near Redmond Ridge, equestrian facility outbuildings, and light commercial spaces along the main corridors. These systems typically see heavier loading than residential due to longer runtime hours and higher occupancy, and they require negative-air extraction with source-agitation methods rather than simple vacuum passes. A commercial system in Union Hill-Novelty Hill generally runs $800 – $2,400 depending on square footage, access, and whether the property includes outbuilding systems like barn offices or workshop HVAC.
Outbuilding and Agricultural Systems
Facilities near pasture or woodland in Union Hill-Novelty Hill often have detached structures with independent ductwork that loads up fast on pollen and organic debris. We clean these with the same Nikro negative-air equipment and HEPA containment we use on main buildings, because cross-contamination between a hay-storage outbuilding and an office HVAC system is a real concern here.
Office and Retail Duct Maintenance
Commercial properties with newer heat-pump VRF systems need careful pressure balancing during cleaning to avoid throwing off zone controls. Our technicians document static pressure before and after, and we provide before-and-after photos of your own ducts, not stock images.
Air Duct Cleaning Services in Union Hill-Novelty Hill
Air Duct Cleaning Services in Union Hill-Novelty Hill include full-system source removal, supply and return duct cleaning, video inspection, and duct sealing with mastic where joints have failed. A typical full residential cleaning here runs $350 – $650 for a standard single-system home, with larger custom properties or homes with multiple zones running higher. We don’t price per vent; we price per system, agreed in writing before we touch anything.
Video Inspection and Documentation
We run a camera before we quote and after we finish. In Union Hill-Novelty Hill, that footage often shows exactly what you’d expect: cedar pollen caked on plenum walls, fir needles packed in return boots, or the telltale compressed trail of a mouse run. You see it. We see it. There’s no ambiguity about whether the work was necessary or whether it got done.

Duct Sealing and System Integrity
After cleaning, we pressure-test and seal accessible joints with mastic. On older rural properties with original 1990s flex duct, this step matters more than on newer builds – the material fatigues, connections loosen, and every gap is another entry point for the pollen and debris this area generates.

What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Union Hill-Novelty Hill
Our equipment roster includes Rotobrush rotary brush systems for mechanical agitation, Nikro negative-air machines for controlled extraction, and filtration products from Honeywell and Aprilaire. We stock common filter sizes and replacement media for Union Hill-Novelty Hill customers, which means faster turnaround when your system needs a filter swap after cleaning or when a new build’s long duct runs require higher-MERV loading. Abatement Technologies HEPA filtration runs on every job site, containing dislodged debris instead of redistributing it through your home. We don’t show up with hardware-store vacuums and call it professional.
Common Air Duct Cleaning Problems We See in Union Hill-Novelty Hill Homes
- Rodent nesting material in flex duct runs. Homes backing onto wooded acreage or equestrian properties in Union Hill-Novelty Hill routinely harbor mice that pack dry grass, pine cones, and fir needles into the soft flex duct near air handlers. The material compresses, blocks airflow, and decomposes into a musty source you can’t reach with a household vacuum.
- Cedar and fir pollen caked on return plenums. The Pacific Northwest marine climate generates heavy seasonal pollen release in spring and fall, and return ducts in this area pull that load straight into the air handler. Over multiple seasons, it bakes onto plenum walls and becomes a continuous re-release source.
- Long, complex duct runs with accumulation zones. Custom homes from the 1980s-2000s in Union Hill-Novelty Hill were built with open floor plans and extended ductwork to reach distant zones. Those long runs have low-velocity dead spots where debris settles and standard cleaning misses without proper agitation and negative-air draw.
- Two system profiles, one ZIP code. A technician who treats a 2020 heat-pump build the same as a 1992 rural property with original flex duct will either under-clean the long runs or damage the older material. We assess before we quote, and we quote before we clean.
Pricing for Air Duct Cleaning in Union Hill-Novelty Hill, WA
A typical full residential air duct cleaning in Union Hill-Novelty Hill runs $350 – $650 for a single-system home with up to 15 – 20 registers. Larger custom properties with multiple zones or extended duct runs range $550 – $950. Commercial systems start around $800 and scale with square footage and access complexity.
What moves the price: number of HVAC zones, accessibility of the air handler and duct runs, whether video inspection reveals blockages requiring extra agitation time, and whether duct sealing is needed after cleaning. We don’t do per-vent pricing because it’s a bait-and-switch setup – a low per-vent quote that multiplies at the door. We give one flat price per system, written down, before any work starts. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Union Hill-Novelty Hill
Our crews work throughout the region, and we regularly schedule Air Duct Cleaning in Union Hill-Novelty Hill alongside runs to Seattle, Spokane, Tacoma, and Vancouver. Dispatch is coordinated from our Seattle office, with local technicians serving each market under The Garrison Standard.
Serving Union Hill-Novelty Hill, WA - Our Local Coverage Area
We’re based in the Union Hill-Novelty Hill 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 Union Hill-Novelty Hill
Every 2 – 3 years for most rural properties in Union Hill-Novelty Hill, with fall and spring as the optimal windows. Spring cleaning catches cedar and fir pollen before summer HVAC runtime peaks; fall cleaning removes rodent nesting material before heating season locks your home tight. Homes with visible mouse activity or heavy pollen symptoms may need annual service. Call (361) 326-5060 for a free inspection and we’ll tell you what your specific system shows.
Field mice use accessible flex duct as storage tunnels, especially in homes backing onto wooded acreage or horse pasture. The material is warm, protected, and close to outdoor entry points through foundation gaps or utility penetrations. Pine cones and dry grass are classic mouse nesting stock, not debris that blew in through a register. We find it packed in the flex runs near air handlers, where the low light and stable temperature attract them.
Yes. Newer heat-pump systems in Union Hill-Novelty Hill typically have longer, more complex duct runs designed for open floor plans, and they operate at lower static pressure than older forced-air furnaces. That means lighter debris loading but more dead spots where material settles. We adjust agitation intensity and negative-air draw to match the duct material and system design, and we verify airflow at distant registers before we leave. Older rural properties with 1990s flex duct need gentler mechanical contact and more careful joint inspection.
Commercial systems run longer hours, serve more occupants, and often include outbuildings or detached structures with independent HVAC. In Union Hill-Novelty Hill, that means equestrian facilities, light industrial shops, and office parks need scheduled maintenance with documented before-and-after condition, not one-off residential cleaning. We use the same professional-grade equipment but scale the crew and containment to the job size, and we coordinate around business hours where needed.
It can be, especially during peak pollen season and after rodent intrusion. Outdoor air in wooded Union Hill-Novelty Hill is generally clean, but your duct system concentrates what it pulls in: cedar pollen, fir needles, and organic debris accumulate in the return path and recirculate at higher concentration than ambient outdoor levels. Add mouse droppings or nesting material, and the indoor load can exceed outdoor by a significant margin until source removal is completed. Call (361) 326-5060 for a video inspection and we’ll show you exactly what’s in your system.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Union Hill-Novelty Hill and the greater King County area since 2004.




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