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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AfterAir Duct Cleaning Company in San Lorenzo, CA
Air duct cleaning in San Lorenzo typically runs $400 – $700 for a whole-home system, with most jobs completed in a single visit. We’re Hollis Air Duct Cleaning, and we’ve built our work around what San Lorenzo homes actually need: original 1950s – 1970s ductwork that wasn’t designed for modern filtration, marine-layer dampness that breeds mold, and wildfire ash that finds its way into attic runs. Our crews arrive uniformed, background-checked, and equipped with Rotobrush rotary systems and Nikro negative-air machines. Call (361) 326-5060 for a free written estimate.
Why San Lorenzo Homes Are Different
San Lorenzo sits in the fog belt off San Francisco Bay, where cool, damp summers and mild, wet winters create a one-two punch for ductwork. The marine layer keeps humidity high enough for mold and mildew to colonize inside metal ducts, especially in uninsulated attic runs. Then dry fall winds carry wildfire ash and dust from the East Bay hills fires, settling into those same ducts and circulating through living rooms.
The housing stock compounds this. Most homes here are 1950s – 1970s single-story ranches and Eichler tracts with shallow-pitch roofs. Original sheet-metal or early flex duct systems degrade, sag, and accumulate debris. Many ducts run through uninsulated attics, making them prone to pest intrusion and condensation. In the Eichler neighborhood off Via Alamitos, we regularly find original 1950s ductwork wrapped in asbestos tape that requires special handling, and the low roof clearances mean our hoses must thread through tight attic spaces with minimal room to maneuver.
Our Main San Lorenzo Services
San Lorenzo homeowners call us for three jobs, each handled on its own dedicated page:
Air Duct Cleaning in San Lorenzo
We clean supply and return ducts, registers, and the main trunk line using a rotary brush system that loosens debris and a negative-air machine that pulls it out of your home entirely. In San Lorenzo, we pay special attention to mold staining from marine-layer humidity and ash buildup from wildfire season. Every job gets a written price before we start and before-and-after photos of your own ducts. Air Duct Cleaning in San Lorenzo
Dryer Vent Cleaning in San Lorenzo
Lint accumulation in dryer vents is a leading cause of house fires, and older San Lorenzo homes with longer vent runs through uninsulated walls or attics are especially vulnerable. We clear the full run from appliance to exterior termination, check airflow with a meter, and verify the vent cap operates freely. If we find a damaged section in a hard-to-reach attic run, we’ll show you exactly where and quote a repair in writing. Dryer Vent Cleaning in San Lorenzo
Duct Sealing in San Lorenzo
Leaky ducts in San Lorenzo’s original 1960s systems can lose 20 – 30% of conditioned air into attics and crawl spaces. We seal joints and seams with mastic and mechanical fasteners, then pressure-test the system to verify results. This is especially valuable in Eichler homes with their characteristic slab foundations and limited access, where every cubic foot of cooled or heated air matters. Duct Sealing in San Lorenzo
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in San Lorenzo
We work on all major residential HVAC brands and stock filters and components from Honeywell, Aprilaire, and Abatement Technologies locally. Most replacement parts arrive within 24 hours; if we don’t have it on the truck, we’ll tell you exactly when it will be here before we schedule the return visit. See our brands for the full list.
Pricing for Air Duct Cleaning Company in San Lorenzo, CA
| Service | Typical range in San Lorenzo |
|---|---|
| Whole-home air duct cleaning (single system) | $400 – $700 |
| Whole-home air duct cleaning (two systems) | $650 – $1,100 |
| Dryer vent cleaning (standard run) | $150 – $250 |
| Dryer vent cleaning (long run or roof termination) | $200 – $350 |
| Duct sealing (whole system) | $800 – $1,500 |
| Duct sealing (partial, one zone) | $350 – $600 |
| Mold remediation add-on (light treatment) | $200 – $400 |
| Register/grille deep cleaning (per unit, add-on) | $15 – $25 |
| Asbestos tape encapsulation (where found) | $300 – $600 |
| HVAC filter upgrade (Honeywell/Aprilaire) | $75 – $200 |
Prices in San Lorenzo run toward the higher end when we encounter degraded flex duct that needs careful handling, asbestos tape requiring encapsulation, or significant mold staining from years of marine-layer exposure. The price we write down before any work starts is the price you pay. No per-vent add-ons, no equipment fees, no surprises when the job is done.
Neighborhoods We Serve in San Lorenzo
We cover all of San Lorenzo and the unincorporated areas nearby. Most appointments are scheduled within a few days, with dispatch coordinated from our Bay Area office.
- Via Alamitos Eichler tract
- San Lorenzo Village (original 1940s – 1950s development)
- Hesperian Boulevard corridor
- Lewelling Boulevard area
- Washington Manor and surrounding ranch tracts
Service Area – Cities Near San Lorenzo
Our crews work throughout the East Bay and surrounding communities. We regularly serve Castro Valley, CA to the north, San Leandro, CA to the west, and also travel to Union City, GA and Oakland, FL for scheduled appointments.
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 Company in San Lorenzo
Standard residential duct cleaning and dryer vent cleaning do not require permits in San Lorenzo. Duct sealing that involves modifying or replacing ductwork may need an Alameda County permit if structural changes are involved. We handle permit research on larger jobs and include any costs in your written estimate.
Most San Lorenzo appointments are available within 3 – 5 business days. We do not promise same-day dispatch, but our phones are answered by a live person 24/7, so you can book or ask questions whenever it’s convenient. Call (361) 326-5060 to check current availability.
Yes. We cover all of San Lorenzo proper plus the surrounding unincorporated Alameda County pockets, including homes near the San Leandro border and along the I-880 corridor. If you’re unsure whether your address falls in our service area, call us with your cross streets and we’ll confirm immediately.
What happens when you call
- 1A real person answersNo phone trees - talk to a local air duct cleaning pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What San Lorenzo Customers Say
"Sealed some leaking duct joints in the crawl space with mastic. Rooms that were always cold now get air."
- Ronald W."Dryer vent was packed with lint and took two hours to dry a load. Cleaned it out from the roof cap down. One cycle again."
- Paula Q."No sales pitch. Told me which parts of the system were fine and only cleaned what needed it."
- Ted L.