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 San Lorenzo
Air duct cleaning in San Lorenzo typically runs $350 – $650 for a full residential system, with most jobs completed in a single visit. We’re familiar with the specific challenges here: the fog belt’s damp summers, the Eichler tracts off Via Alamitos with their original 1950s ductwork, and the ranch homes near Lewelling Boulevard where wildfire ash from East Bay hills settles in attic runs. Our Air Duct Cleaning crews dispatch from the San Francisco Bay Area office and carry containment gear for asbestos tape, HEPA filtration for mold spores, and rotary systems built for tight attic clearances. 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.
Why Hollis Air Duct Cleaning Is San Lorenzo’s Preferred Air Duct Cleaning Company
We’ve been serving San Lorenzo since 2004 as part of the Garrison Partners family, and our reputation here is built on showing up when we said we would. Roy Castellanos leads this operation, and The Garrison Standard means our technicians arrive inside the quoted window, price the job in writing before touching anything, and leave the site clean.
San Lorenzo homeowners call us back because the price at the door matches the price on the phone. No per-vent add-ons, no “discovered problems” once the van is in the 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. Background-checked, uniformed technicians. Phones answered by a live person, 24 hours a day, 7 days a week. That’s the standard we hold ourselves to on every San Lorenzo job.
Air Duct Inspection in San Lorenzo
Air Duct Inspection in San Lorenzo starts with a camera run through the full system, because the housing stock here hides problems that a visual register check won’t catch. Original 1950s flex duct in Eichler tracts off Via Alamitos often sags in uninsulated attics, creating low spots where fog-belt condensation pools and mold colonies grow behind the walls. A typical inspection in San Lorenzo runs $150 – $250 and includes video documentation of every trunk line, branch run, and air handler connection.
What We Look For in Older Systems
We flag asbestos tape wrapping, duct separation at sheet-metal joints, and filter bypass where original systems lack MERV-rated housings. The camera doesn’t lie, and the footage belongs to you.
When to Schedule an Inspection
Book an inspection if you smell must when the furnace kicks on, if dust resets within days of cleaning, or if your home was built before 1975 and the ducts have never been scoped. In San Lorenzo’s fog belt, we recommend a camera inspection every two to three years for homes with uninsulated attic runs.
Residential Air Duct Cleaning in San Lorenzo
Residential Air Duct Cleaning in San Lorenzo requires a different protocol than newer cities with sealed duct systems and modern filtration. Our crews use Rotobrush rotary systems for standard metal trunk lines, but in Eichler neighborhoods with shallow-pitch roofs and tight attic clearances, we switch to manual agitation tools to avoid fraying asbestos tape wraps. A full residential cleaning in San Lorenzo typically costs $350 – $650 for a single-system home, with multi-zone homes running $550 – $850.
Containment Before Agitation
In the Eichler tracts off Via Alamitos, we seal registers with Abatement Technologies HEPA filtration running under negative pressure before any brush enters the duct for Duct Sealing in San Lorenzo. This isn’t optional here. It’s the step that keeps asbestos fibers and mold spores from circulating through your living space during cleaning.
Source Removal for Fog and Ash
San Lorenzo’s marine layer drives mold spores into uninsulated attic ducts; dry fall winds carry wildfire ash from the East Bay hills. We pull both out with source removal, not chemical masking. The negative-air method extracts debris to a sealed containment unit outside your home.
Trusted Brands We Service in San Lorenzo
We run professional-grade equipment on every San Lorenzo job: Rotobrush rotary brush systems for metal trunk lines, Nikro negative-air machines for source removal in containment situations, and filtration upgrades from Honeywell and Aprilaire for homes ready to move beyond original 1950s filter slots. We stock Aprilaire and Honeywell media locally, so if your Eichler or ranch home needs a filter housing retrofit after cleaning, we’re not ordering parts and making you wait. The same goes for Abatement Technologies HEPA containment gear, which we keep on every truck serving the San Lorenzo area because fog-belt mold and asbestos tape wraps aren’t surprises here. They’re conditions we plan for.
Common Air Duct Cleaning Problems We See in San Lorenzo Homes
- Asbestos tape degradation in Eichler tracts. Original 1950s ductwork off Via Alamitos was wrapped in asbestos tape that frays when standard rotary brushes contact it. We use manual agitation and HEPA containment instead.
- Mold colonies in sagging flex duct low spots. San Lorenzo’s fog belt keeps uninsulated attic ducts damp for months. Condensation pools where 1960s flex duct sags between rafters, and a standard brush-and-vacuum misses these hidden reservoirs.
- Wildfire ash accumulation in return runs. Dry fall winds pull fine ash from East Bay hills fires into attic vents and through unsealed return plenums. The ash cakes on blower motors and recirculates until source removal pulls it out.
- Filter bypass in original sheet-metal systems. Many San Lorenzo ranch homes were built without MERV-rated filter housings. Debris from winter storms and unpaved road dust near rural property edges passes straight to the coil and blower, shortening equipment life and loading the ducts.
Pricing for Air Duct Cleaning in San Lorenzo, CA
Here’s what air duct cleaning costs in San Lorenzo’s market, with ranges based on actual jobs we’ve priced and completed:
| Service | Typical Range in San Lorenzo |
|---|---|
| Air Duct Inspection with video | $150 – $250 |
| Residential Duct Cleaning (single system) | $350 – $650 |
| Residential Duct Cleaning (multi-zone) | $550 – $850 |
| Dryer Vent Cleaning (add-on) | $125 – $200 |
| Duct Sealing with mastic (per system) | $400 – $700 |
Three factors move San Lorenzo jobs toward the higher end: asbestos tape containment requirements in Eichler homes, multi-zone systems with access panels in tight attic spaces, and heavy debris loading from rural properties near unpaved roads. We give one flat price per system, agreed in writing before work starts. No per-vent pricing. No add-ons at the door. Call (361) 326-5060 for a free estimate. We’ll inspect your system and hand you a written quote you can compare without pressure.
We Also Serve Cities Near San Lorenzo
Our crews work throughout the East Bay, including San Lorenzo and neighboring Castro Valley, San Leandro, Union City, and Oakland. Each community has its own housing stock and duct conditions, from Castro Valley’s hillside homes with long vertical runs to Oakland’s mixed-era inventory. We adjust our approach to what the house requires, not what fits a template.
Serving San Lorenzo, CA - Our Local Coverage Area
We’re based in the San Lorenzo 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 Lorenzo
Every 18 to 24 months, not the standard 3- to 5-year interval recommended for newer sealed systems. The combination of asbestos tape wraps, uninsulated attic runs, and fog-belt condensation creates debris loading that accelerates faster than in modern tracts. Call (361) 326-5060 and we’ll assess your specific duct condition and usage.
Yes. Our crews are trained in abatement-aware containment and use Abatement Technologies HEPA filtration under negative pressure before any agitation begins. We do not use standard rotary brushes on asbestos tape wraps. The tape is encapsulated in place, not removed, and the debris around it is extracted without disturbing the wrap.
San Lorenzo’s marine layer keeps uninsulated attic ducts damp through summer, promoting mold and mildew growth that inland cities with drier summers don’t see at the same rate. The fog also swells any existing duct tape adhesives and accelerates flex duct degradation. Inland systems dry out faster and typically show dust loading rather than biological growth.
Yes, but only as part of a broader approach. Source removal pulls accumulated dust and pollen from the duct walls, but if the home lacks a proper filter housing, new debris enters immediately. We often recommend a Honeywell or Aprilaire filter upgrade during cleaning to break the cycle on rural San Lorenzo properties near open land or unpaved roads.
We feed hoses through carefully chosen access points, often from the garage or a closet ceiling rather than the main attic hatch. Manual agitation tools replace rotary brushes where clearances are under 24 inches. The work takes longer than standard jobs, but it protects the asbestos tape and reaches debris that rigid shafts would miss. We price this upfront, in writing, before starting.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving San Lorenzo since 2004.