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 Francisco
Most San Francisco homeowners pay between $380 and $720 for a complete residential duct cleaning, with full-system jobs in larger Edwardian flats running toward the upper end. We’re Kestrel Air Duct Cleaning, and our crews work the fog belt from the Outer Richmond to Bayview, dispatching from our San Francisco Bay Area office to keep arrival windows tight. If your vents smell musty even when the heat’s off, or you’ve never had the flex duct under your raised floor inspected, call us at (469) 972-3151. We’ll put a written price in your hands before a single vent is touched.
Why Kestrel Air Duct Cleaning Is San Francisco’s Preferred Air Duct Cleaning Company
We’ve been serving San Francisco under the Kingswell Guarantee since 2004. That means a written price before work starts, a defined arrival window, a clean job site, and a written 365-Day Done Right Promise on every single visit. Our technicians are background-checked, uniformed, and trained on the specific failure modes of this city’s housing stock, not generic suburban systems.
San Francisco customers call us back because we answer the phone with a live person, 24/7. No voicemail queue. No automated system. A real conversation, any time of day. When you’re staring at a water-stained ceiling register in a Sunset district flat at 10 PM, that matters.
Our crews know the difference between a dust-only clean and the moisture remediation this climate actually demands. 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. Real tools, not box-store shop vacs.
Our Air Duct Cleaning team documents every job with before-and-after photos of your own ducts, not stock images. The Kingswell Way governs every visit: say the price, show up in the window we gave, leave the place cleaner, put the guarantee in writing, come back if it fails.
Air Duct Repair in San Francisco
Air Duct Repair in San Francisco almost always involves moisture-damaged flex duct in crawl spaces that never fully dry out. We find crushed runs, disconnected joints at the trunk line, and liner separation caused by years of condensation cycling. A typical repair runs $280-$520 for single-run replacement and resealing, with multi-run jobs in larger flats reaching $680-$940.
Collapsed Flex Duct Under Raised Floors
The 1990s flex duct retrofitted through San Francisco’s tight crawl spaces was never meant to bear weight. We regularly find sections flattened by foot traffic during maintenance or sagging until they pinch closed. Our crew pulls the damaged run, sizes replacement flex with proper support straps, and seals all trunk connections with mastic, not duct tape.
Shared Duct Runs in Multi-Unit Buildings
Edwardian flats on avenues like Irving or Noriega often have supply ducts that feed two units from a single trunk. Repairing these requires isolating each unit’s airflow path, sometimes adding manual dampers where none existed. We map the system with a camera before cutting, so you don’t pay for work that leaves your neighbor’s air handler tied to yours.
Ductwork Cleaning in San Francisco
Ductwork Cleaning in San Francisco is fundamentally different from the dry-climate particulate removal most companies advertise. The marine layer pulls through crawl-space flex duct by the stack effect, so ducts can sit condensation-wet even when the furnace hasn’t run in weeks. Every clean here starts with a microbial assessment, not a dust count. Residential systems typically run $380-$620; full-system cleaning with video inspection and sealing work in larger homes runs $580-$720.
Negative-Air Extraction with HEPA Containment
We connect a Nikro negative-pressure unit to your trunk line, creating suction that pulls loosened debris toward the collection vessel rather than letting it escape into your rooms. Abatement Technologies HEPA filtration on the exhaust captures particles down to 0.3 microns. This matters in San Francisco’s tight construction, where there’s nowhere for fugitive dust to go but your bedroom.
Rotary Brush Agitation and Camera Verification
Rotobrush rotary brush systems spin a bristled cable through each run, scrubbing the duct wall where moisture has bonded dust into a paste. After agitation, we run a camera to verify the surface is clean and intact, not just “looked okay from the vent opening.” You see the footage. We explain what it means. Then we put the 365-Day Done Right Promise in writing.
Trusted Brands We Service in San Francisco
We clean and maintain systems using Honeywell, Aprilaire, and Guardsman filtration components, and we stock replacement media for San Francisco customers who want to maintain clean air between service visits. Aprilaire whole-home purifiers pair well with the mild run-time schedules here, filtering on low speed continuously rather than slamming high when heat finally kicks on. If your system needs a MERV upgrade after we see what’s actually living in your ductwork, we’ll recommend the right rating for your air handler’s capacity, not oversell you on filtration your fan motor can’t handle.
Common Air Duct Cleaning Problems We See in San Francisco Homes
- Mold-darkened flex duct in the Outer Sunset and Outer Richmond. Technicians routinely pull sections where the interior liner is visibly blackened, a pattern tied directly to Karl the Fog condensing on cold duct walls. Homeowners almost never run heat long enough to notice reduced airflow, so the damage goes unseen until inspection.
- Disconnected joints at the trunk line in 1990s retrofits. The flex duct installed when central air was added to Edwardian flats often pulls free at the collar, dumping conditioned air into the crawl space and pulling musty crawl air into bedrooms through return pathways.
- Cross-connected runs between floors in multi-unit buildings. A “clean” that treats these as one system undercounts scope and leaves your air mixed with the neighbor’s. We map before we quote.
- Moisture-wet duct cleaned without negative pressure. A brush run through damp Sunset flex duct without containment spreads mold spores through every room. We assess moisture first, dry or replace wet sections, then clean with HEPA-contained extraction.
Pricing for Air Duct Cleaning in San Francisco, CA
A typical residential duct cleaning in San Francisco runs $380-$620 for a single-system home with 8-12 vents. Full-system cleaning with supply and return ductwork, plus video inspection, runs $580-$720. Larger Edwardian flats with 15+ vents or shared multi-unit systems typically fall in the $680-$940 range. Air Duct Repair adds $280-$520 per run for replacement and resealing.
What moves you within these ranges: vent count, accessibility of crawl-space runs, whether we find moisture damage requiring section replacement, and whether the system needs sealing work after cleaning. We put one flat price per system in writing before any work begins. No per-vent add-ons. No door-step revisions. Free estimates, and we show you the camera footage so you understand what drove the scope.
Call (469) 972-3151 for your exact quote.
We Also Serve Cities Near San Francisco
Our crews regularly work San Francisco and the surrounding communities: Daly City to the south, Brisbane along the Bayshore, Sausalito across the Golden Gate, and South San Francisco on the peninsula side. Same Kingswell Guarantee, same written price before work starts, same live-answer scheduling at (469) 972-3151.
Serving San Francisco, CA - Our Local Coverage Area
We’re based in the San Francisco 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 Francisco
The marine layer pulls through crawl-space flex duct by the stack effect, so ducts stay wet from fog condensation even when your furnace sits idle for months. In the Outer Sunset and Outer Richmond, we routinely find mold-darkened liner in systems that haven’t run heat since last winter. Call (469) 972-3151 and we’ll show you the camera footage from your own ducts.
Yes, but we map the system with a camera first to identify cross-connections and isolate each unit’s airflow path. Cleaning without this step undercounts scope and leaves your air handler tied to your neighbor’s. We price shared systems as separate duct networks once mapped. Call (469) 972-3151 for a free estimate.
Our crew pulled a collapsed run of 1990s flex duct out of a raised-floor Edwardian on 34th Avenue in the Outer Sunset and found the interior liner black with mildew and three joints disconnected at the trunk. After running a camera inspection through the remaining supply and return ducts, we removed the failed section, sealed the trunk connections, and left the homeowner with a MERV rating recommendation and photos of what came out. That’s typical of what we find in this housing stock.
A higher MERV filter only helps if your fan runs enough to move air through it. In San Francisco’s mild climate, we often recommend Aprilaire media cleaners with moderate MERV ratings paired with continuous low-speed operation, rather than oversizing filtration that chokes a system that already runs infrequently. We assess your actual run-time patterns before recommending.
We provide before-and-after photos of your own ducts, camera footage showing the full run length, and a written completion checklist documenting each vent cleaned, each trunk line inspected, and any repairs made. The 365-Day Done Right Promise covers return visits at no charge if you find residual debris or smell. Call (469) 972-3151 if you have concerns within the guarantee period.
Written by Dale Whitmore, Owner at Kestrel Air Duct Cleaning, serving San Francisco since 2004 under the Kingswell Guarantee.