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 Kensington
Air duct cleaning in Kensington, CA typically runs $380-$650 for a full residential system, with most jobs completed in a single visit. Our crews are dispatched from the San Francisco Bay Area office and serve Kensington directly, so we’re familiar with the local housing stock and the specific conditions that affect ductwork here. Call us at (469) 972-3151 for a free written estimate.
We’ve worked on enough Kensington properties to know the difference between a routine cleaning and one that needs deeper attention. Rural homes near unpaved roads deal with heavier dust and pollen loading. Wood heat systems run longer and harder than gas furnaces, pushing more particulate through the ducts. And the mid-century ranch homes that dominate Kensington’s neighborhoods carry legacy construction issues that newer suburbs simply don’t face. Our Air Duct Cleaning team treats every job as unique because it is.
Why Kestrel Air Duct Cleaning Is Kensington’s Preferred Air Duct Cleaning Company
We’ve built our reputation in Kensington by showing up in the window we promised and putting the price in writing before any work starts. No doorstep revisions. No surprise add-ons. The Kingswell Guarantee, which governs every job we do, was established when the company was founded in 2004, and it hasn’t changed: written price, defined arrival window, clean job site, and a written guarantee with a free return visit if the work fails within the guarantee period.
Our technicians are background-checked and uniformed, and they arrive with professional-grade equipment, not box-store shop vacs. We use Rotobrush rotary brush systems to dislodge debris at the duct wall, Nikro negative-pressure units to pull contaminants out, and Abatement Technologies HEPA filtration to keep loosened particles out of your living space during cleaning. Calls are answered by a live person, 24/7. Not a voicemail queue. A real conversation.
We serve Kensington from our Bay Area dispatch office, and our crews know the local roads, the local building styles, and the local climate conditions that drive duct problems here. That familiarity saves time on every job.
HVAC Duct Cleaning in Kensington
HVAC Duct Cleaning in Kensington addresses the full network of supply and return ducts, registers, grilles, and the air handler that moves conditioned air through your home. For Kensington’s ranch and split-level homes built from the 1950s through the 1970s, this often means dealing with original galvanized or bare sheet-metal duct runs, sometimes with fiberglass-lined flex sections added during later retrofits. These older systems harbor compacted debris after decades of use, and the original cloth duct tape seals have typically dried and cracked, drawing attic and crawl-space air into the living space.
A typical full HVAC duct cleaning in Kensington runs $450-$650 for a standard single-system home. Larger homes or systems with multiple zones may run higher. We always provide a written price before any work begins.
Supply Duct Cleaning
Supply ducts carry heated or cooled air from your furnace or air handler to each room. In Kensington homes, we frequently find that supply runs in unconditioned attics have developed condensation issues during humid summers, leading to mold growth on the duct interior. Our process uses negative-air extraction, which means we create a vacuum throughout the duct system while agitating debris loose with rotary brushes, so contaminants are captured at the source rather than pushed into your rooms.
Return Duct Cleaning
Return ducts pull air back to the HVAC unit for reconditioning. These runs often accumulate the most debris because they’re constantly drawing air, and in Kensington’s older homes, the return pathways may include wall cavities or under-floor channels that were never properly sealed. Our video inspection lets us show you exactly what’s inside before we start cleaning.
Vent Cleaning in Kensington
Vent Cleaning in Kensington focuses on the visible and accessible components: floor registers, wall grilles, ceiling diffusers, and the short duct sections immediately behind them. This service is often bundled with full system cleaning, but some Kensington homeowners request standalone vent cleaning when they notice visible dust buildup, musty odors from specific registers, or reduced airflow in particular rooms.
Standalone vent cleaning in Kensington typically runs $180-$280 for a whole-home sweep of 10-15 registers and grilles. If we find that the problem extends deeper into the duct trunk, we’ll show you with our camera and quote the full cleaning before proceeding.
Floor Register Deep Cleaning
Kensington’s slab-set duct boots create a unique problem at floor registers. Ground moisture wicks directly into the lowest duct sections, and we routinely find standing sediment and active mold at the floor registers even when the furnace and main trunk look relatively clean. Our technicians remove each register, clean the boot and adjacent duct section with brush agitation, and apply antimicrobial treatment where appropriate. We also document any boot deterioration so you can address the underlying moisture issue.
Dryer Vent Cleaning
Dryer vent cleaning is the second service we offer, and it’s often overlooked until clothes take two cycles to dry or the laundry room feels unusually humid. Kensington homes with longer vent runs through crawl spaces or attics are especially prone to lint accumulation that restricts airflow and creates fire risk. We clean the full run from the dryer connection to the exterior termination, and we check for proper airflow before we leave.
Trusted Brands We Service in Kensington
We clean ductwork connected to all major HVAC brands, and we stock filtration and indoor air quality products from Honeywell, Aprilaire, and Guardsman for Kensington homeowners who want to maintain cleaner air between service visits. If your system needs a filter upgrade or you’re dealing with persistent dust issues even after cleaning, we can recommend and install the right product for your specific equipment. Most filtration upgrades can be completed during the same visit as your duct cleaning, with the cost included in your written estimate.
Common Air Duct Cleaning Problems We See in Kensington Homes
- Cracked cloth duct tape seals on original sheet-metal ducts. The post-WWII building boom in Berlin produced dense concentrations of homes with ductwork sealed using cloth-backed tape that dries out and fails after 40-60 years. These open joints actively draw attic and crawl-space air into the supply, introducing fiberglass particles, rodent dander, and mold spores into living spaces.
- Slab-set duct boots without vapor barriers. A common Berlin-era construction shortcut, these boots allow ground moisture to wick directly into the lowest duct sections. We find standing sediment and active mold at floor registers on ranch homes throughout Kensington, even when the main trunk appears clean.
- Condensation in unconditioned attic and crawl-space runs. Kensington’s inland valley location means summer humidity regularly exceeds 80%, while winter heating runs five or more months. This combination drives moisture into ductwork passing through uncooled spaces, creating recurring mold-growth conditions that can recolonize within two to three seasons if not addressed alongside cleaning.
- Compacted debris in galvanized steel ducts after decades of use. Original bare sheet-metal runs in Kensington’s mid-century homes lack the smooth internal surfaces of modern ductwork, and decades of airflow have left layers of dust, pollen, and pet dander that restrict airflow and degrade indoor air quality.
Pricing for Air Duct Cleaning in Kensington, CA
Most Kensington homes fall between $380 and $650 for complete residential air duct cleaning, depending on system size, accessibility, and condition. Here’s how typical projects break down:
| Service | Typical Range in Kensington |
|---|---|
| Vent Cleaning (standalone) | $180-$280 |
| Full HVAC Duct Cleaning (single system) | $450-$650 |
| Full System with Video Inspection | $520-$720 |
| Dryer Vent Cleaning | $150-$220 |
What moves the price: number of supply and return ducts, presence of mold requiring antimicrobial treatment, accessibility issues in crawl spaces or attics, and whether duct sealing or repair is needed alongside cleaning. We provide one flat price per system, agreed in writing before any work begins. No per-vent pricing. No surprise charges when we arrive. You’ll receive before-and-after photos of your own ducts, and every job carries our 365-Day Done Right Promise in writing.
Call (469) 972-3151 for a free estimate. We’ll ask about your home’s age, system type, and any specific concerns, then give you a firm written quote.
We Also Serve Cities Near Kensington
Our San Francisco Bay Area dispatch office coordinates service throughout the region. In addition to Kensington, we regularly work in Los Angeles, San Diego, San Jose, and San Francisco. Each location operates independently under the Kingswell Guarantee, with the same written pricing standard and 365-Day Done Right Promise applied to every job.
Serving Kensington, CA - Our Local Coverage Area
We’re based in the Kensington 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 Kensington
Every 2-3 years for most Kensington ranch properties with these conditions, compared to the 3-5 year interval typical in suburban areas with paved roads and gas heat. Unpaved roads generate heavier dust and pollen loading that enters through windows, doors, and ventilation systems. Wood heat produces more particulate matter than gas or oil systems, and the longer burn seasons in Kensington push more ash and soot residue through ductwork. If you notice visible dust accumulation at registers, musty odors when the system starts, or increased allergy symptoms, schedule an inspection sooner. Call (469) 972-3151 and we’ll assess whether you’re due.
Because cleaning alone leaves the same open pathways that allowed contamination in the first place. Kensington’s mid-century homes were built with cloth duct tape seals that have dried and cracked over 40-60 years, creating gaps at every joint. These openings draw attic air, crawl-space air, and whatever contaminants they contain directly into your living space. We document seal condition during our video inspection and can include resealing with mastic or foil-backed tape in your written estimate. The cleaning removes what’s already inside; resealing stops new contamination from entering.
Condensation from unconditioned duct runs in humid summers, combined with slab-set boots that wick ground moisture year-round. Kensington’s inland valley climate produces summer humidity above 80%, and attic temperatures can exceed 120°F while crawl spaces stay cool and damp. When cool conditioned air passes through these spaces, the duct surface temperature drops below the dew point, and water condenses inside. Mold spores that survive cleaning will recolonize within two to three seasons if the underlying moisture issue isn’t addressed. We identify these conditions during inspection and recommend solutions, which may include duct insulation, vapor barriers, or dehumidification, alongside cleaning.
We remove each floor register and inspect the boot with a borescope camera, documenting moisture damage, sediment accumulation, and mold growth. On a ranch off Deming Road, we found the original slab-set duct boots wicking ground moisture-our camera inspection showed standing sediment and active mold at the floor registers. Using Rotobrush agitation tools under negative pressure with HEPA filtration, we performed source removal on the supply and return ducts, then resealed the failed joints. The homeowner said the musty odor in the back bedroom disappeared within a day. We always show you the camera footage and explain what we found before recommending any additional work.
The National Air Duct Cleaners Association requires source removal of contaminants using mechanical agitation and collection, protection of the home during cleaning, and post-cleaning verification. Our process meets this standard: we seal registers to create negative pressure throughout the system, use Rotobrush rotary brushes to dislodge debris from duct walls, capture loosened material with Nikro negative-air machines, and filter exhaust air through Abatement Technologies HEPA units so nothing escapes into your living space. We provide before-and-after photos of your ducts as verification. Every technician follows The Kingswell Way: say the price, show up in the window, leave the place cleaner, put the guarantee in writing, come back if it fails.
Ready to see what’s inside your ducts? Call (469) 972-3151 for a free written estimate. We’ll schedule a visit, inspect your system with video, and give you one flat price before any work begins. Every job carries our 365-Day Done Right Promise in writing.
Written by Dale Whitmore, Owner at Kestrel Air Duct Cleaning, serving Kensington under the Kingswell Guarantee since 2004.