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 San Anselmo
Air duct cleaning in San Anselmo typically runs $450-$850 for a full residential system, and every job starts with a written price before we touch a single vent. We’re the Air Duct Cleaning team that serves San Anselmo from our Bay Area dispatch office, with crews who know the Ross Valley’s specific problems: flood-era sediment in crawl-space ducts, moisture-trapping bowl geography, and the patched-together ductwork common in pre-1960 homes. Call (469) 972-3151 for a free estimate.
San Anselmo homeowners call us because they’ve dealt with the alternative. A fogging “sanitiser” that leaves silt untouched. A quote that doubles once the van is in the driveway. Technicians who don’t recognize that a Craftsman bungalow on Crescent Road has three generations of duct material spliced through a damp crawl space. We do source removal, not cover-up. We put the price in writing first. And we come back if it fails.
Why Kestrel Air Duct Cleaning Is San Anselmo’s Preferred Air Duct Cleaning Company
We’ve built our reputation in San Anselmo on showing up in the window we promised and leaving the job site cleaner than we found it. The Kingswell Way, our technician code, requires it: say the price, arrive on time, clean up, put the guarantee in writing. Dale Whitmore established this standard when Kestrel joined the Kingswell family of companies in 2004, and it hasn’t changed.
Our San Anselmo customers specifically mention two things in feedback: the before-and-after photos we provide from their own ducts, and the fact that our written price matched the final invoice exactly. No per-vent add-ons. No “discovered problems” at the door. The 365-Day Done Right Promise means if our work falls short within that year, we return and make it right at no charge. That’s documented on every job, not offered as a favor later.
Calls route to a live person, 24/7. Not a queue. Not an automated system. A real conversation, whether you’re calling from a Tudor Revival near San Anselmo Creek or a ranch-style home up toward Sleepy Hollow.
Vent Cleaning in San Anselmo
Vent Cleaning in San Anselmo addresses the supply and return registers you see on walls, floors, and ceilings, plus the short duct runs behind them that collect the debris your filter missed. In this market, most residential vent cleaning runs $180-$340 for a standard home with 8-12 registers. We use Rotobrush rotary brush agitation, which means a spinning brush head loosens debris at the duct wall while a Nikro negative-pressure unit pulls it out of your system entirely. The Abatement Technologies HEPA filtration captures particles down to 0.3 microns so nothing resetstles in your living space during the work.
When Vent Cleaning Becomes Necessary
Visible dust puffing from registers when the HVAC cycles. Registers that feel damp to the touch, common in San Anselmo’s fog-trapping valley floor. Or a musty smell that intensifies when the blower runs. These symptoms point to buildup in the terminal duct runs, not just surface grime on the grille.
What We Check Behind Every Vent
We inspect the boot connection, the elbow behind the wall, and the first few feet of trunk line. In San Anselmo’s retrofitted homes, this is where we often find flex duct that has pulled away from sheet metal, or duct board that has softened from crawl-space moisture. Catching this early prevents air loss and contamination recirculation.
Air Duct Repair in San Anselmo
Air Duct Repair in San Anselmo fixes the disconnected, deteriorated, or improperly sealed ductwork that undermines your HVAC efficiency and indoor air quality. Typical repairs in this market range from $200 for a simple reconnection to $1,200+ for replacing multiple compromised sections in a crawl space. We encounter more repair needs here than in newer Marin communities because San Anselmo’s housing stock was never designed for forced air. Retrofit installers in the 1960s and 1970s ran ducts through tight crawl spaces and wall cavities, splicing sheet metal, duct board, and flex duct wherever they could make it fit.
Flood-Damage Repairs Near the Creek
In the lower downtown corridor and neighborhoods closest to San Anselmo Creek, we regularly repair duct sections with visible sediment tide marks from the 2005 and 2006 floods. The contamination isn’t always obvious until we run camera inspection. We replace affected material, seal transitions properly, and document the work with photos for your records.
Sealing and Insulation in Damp Crawl Spaces
The Ross Valley’s persistent crawl-space dampness degrades duct tape and foil-backed insulation faster than drier climates. We use mechanical fasteners and mastic sealant, not tape, at every connection. For homeowners with recurring moisture problems, we can recommend Honeywell or Aprilaire dehumidification strategies to protect the repair long-term.
Trusted Brands We Service in San Anselmo
Our technicians arrive with Rotobrush, Nikro, and Abatement Technologies equipment on every truck, and we stock Honeywell, Aprilaire, and Guardsman filtration products for San Anselmo homeowners who want to maintain clean air between service visits. These aren’t box-store shop vacs with extra hoses. The Nikro negative-air units create controlled suction that prevents debris migration during cleaning. The Abatement Technologies HEPA systems filter exhaust air so particles don’t resettle in your bedrooms or kitchen. If your system needs a media upgrade after cleaning, we can install Aprilaire pleated filters or Honeywell electronic air cleaners with fast turnaround, no special-order delays.
Common Air Duct Cleaning Problems We See in San Anselmo Homes
- Flood sediment in crawl-space returns. On a Tudor Revival cottage near San Anselmo Creek in the lower downtown corridor, our tech pulled a section of return duct that still had a visible silt line from the 2005 flood. We ran camera inspection through the spliced sheet-metal, duct board, and flex runs, then used agitation tools under negative pressure with HEPA filtration to do source removal on the affected supply and return ducts. The homeowner had no idea the contamination reached inside the ductwork until we showed them the footage.
- Multi-generation ductwork with hidden leaks. A typical San Anselmo Craftsman has original sheet metal from a 1970s retrofit, patched with flex duct after a 1990s renovation, maybe with some duct board added when the air handler was relocated. Each transition is a potential leak point that bypasses filtration and pulls crawl-space air into your supply.
- Moisture-bound dust accelerating microbial growth. The marine fog that pools in the Ross Valley overnight keeps crawl-space temperatures low and humidity high. Dust that would stay dry and inert in a hotter climate binds with moisture here, creating the substrate for mold colonization inside duct sections at or below grade.
- Fogging “sanitisers” sold as cleaning. We’ve been called to homes where a previous crew sprayed antimicrobial fog through the registers and collected their fee. The flood silt remained. The microbial staining remained. The homeowner paid for odor masking, not source removal. We don’t sell fogging as a substitute for mechanical cleaning.
Pricing for Air Duct Cleaning in San Anselmo, CA
Most full-system air duct cleaning jobs in San Anselmo run $450-$850 for a typical single-family home. Whole-system cleaning with video inspection, including supply and return ducts, trunk lines, and register cleaning, usually falls in the $650-$850 range. Vent cleaning alone, for homeowners who don’t need full-system work, typically costs $180-$340. Air duct repair starts around $200 for minor reconnections and can reach $1,200 or more for extensive crawl-space replacement in flood-affected homes.
What moves you within these ranges: the number of registers and trunk lines, accessibility (crawl space vs. basement), whether we find disconnected or damaged ductwork that needs repair before cleaning is effective, and the degree of contamination. Homes near San Anselmo Creek with flood-era sediment require more time and specialized agitation than standard maintenance cleaning.
We give one flat price per system, agreed in writing before work starts. No per-vent pricing. No door-step revisions. You’ll see before-and-after photos from your own ducts. Call (469) 972-3151 for an exact quote, estimates are free.
We Also Serve Cities Near San Anselmo
Our crews work throughout central and southern Marin County. We regularly service Air Duct Cleaning in San Anselmo plus Fairfax, Kentfield, San Rafael, and Larkspur. Each community has its own ductwork character, from Fairfax’s hillside cottages to San Rafael’s mixed-era housing stock, and we adjust our approach accordingly rather than apply a single template.
Serving San Anselmo, CA - Our Local Coverage Area
We’re based in the San Anselmo 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 San Anselmo
The 2005 and 2006 San Anselmo Creek floods pushed water and silt directly into crawl-space duct runs throughout the lower downtown corridor, leaving sediment tide marks and microbial staining that higher-elevation towns like Ross and Larkspur simply don’t have. The Ross Valley’s bowl geography also traps more overnight fog, keeping those same crawl spaces damp enough to accelerate mold recolonization after cleaning. Call (469) 972-3151 if you suspect flood-era contamination in your system, estimates are free.
No. Fogging deposits antimicrobial chemical on surfaces but does not remove physical debris. Flood silt, sediment, and the organic material that supports microbial growth remain in the duct after fogging. Source removal requires mechanical agitation, negative-air extraction, and HEPA filtration to pull contaminants out of your system entirely. We do not sell fogging as a substitute for cleaning. Call (469) 972-3151 to discuss what genuine source removal involves for your home.
Most homeowners cannot tell without camera inspection. Visible signs that suggest flood contamination include persistent musty odors when the HVAC runs, registers in lower-floor rooms that show rust staining or dirt accumulation faster than upper-floor vents, and any history of crawl-space water intrusion in your property records. We run video inspection through duct sections to document what we find before recommending cleaning or repair. Call (469) 972-3151 to schedule an inspection.
These homes were built before forced-air heating existed, so ductwork was retrofit into structures never designed for it. Installers ran supply and return lines through tight crawl spaces, wall cavities, and sometimes exterior chases, using whatever material was standard at the time: sheet metal in the 1960s, duct board in the 1970s, flex duct in later decades. Multiple owners, multiple HVAC contractors, and multiple renovation cycles created the spliced-together systems we see today. Call (469) 972-3151 if your older home has uneven heating, high energy bills, or air quality concerns, we can assess whether duct complications are the cause.
A genuine cleaning includes mechanical agitation of debris at the duct wall, negative-air extraction to remove loosened material from your home entirely, HEPA filtration on exhaust air, and before-and-after documentation from your specific system. In San Anselmo, it should also include inspection for flood-era sediment in crawl-space runs, assessment of multi-generation ductwork integrity, and repair recommendations where moisture or disconnection compromises performance. We provide all of this under our written 365-Day Done Right Promise. Call (469) 972-3151 for a detailed estimate.
Written by Dale Whitmore, Owner at Kestrel Air Duct Cleaning, serving San Anselmo since 2004 under the Kingswell Guarantee.