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
AfterAir Duct Cleaning in San Lorenzo, CA
Dryer vent cleaning in San Lorenzo regularly uncovers lint packed into 65-year-old galvanized runs, and the call usually comes after a dryer takes two cycles to finish a load. The housing stock here is almost entirely David Bohannon tract homes built between 1944 and 1955, which means vent routes share the same short, low-clearance crawl-space paths. If your dryer is struggling, call (806) 606-6902 for a written price before any work begins.
Why San Lorenzo Homes Are Different
San Lorenzo is one of California’s first large-scale planned postwar suburbs, built almost entirely in a single construction campaign that ended by 1955. That means the CDP’s residential ductwork is nearly uniformly 65 to 75 years old, originally routed into low crawl spaces never engineered for central forced-air. Sheet-metal trunk lines and early flex-duct branches sit close to bare soil, and decades of settling, rodent activity, and moisture have left disconnected joints and collapsed flex sections as near-universal conditions in pre-1956 homes.
The climate compounds it. Marine air funnels inland through the Hayward hills gaps and deposits seasonal fog moisture into those crawl spaces through the mild but persistently damp winters. Original sheet-metal ducts were never vapor-sealed, so that ground-level dampness accelerates mold colonization and dust-mite proliferation inside the system. A technician working San Lorenzo quickly learns the Bohannon floor plan by heart: the same trunk-line path, the same undersized return-air box, the same vulnerable register-boot connections appear house after house across the grid streets. Inspection routes become predictable before the van door opens, which means a cleaner can get straight to the problem.
Our Main San Lorenzo Services
Most San Lorenzo homeowners call us first about the two jobs below, and each has its own detailed page with local pricing and what to expect.
Air Duct Cleaning in San Lorenzo
Whole-system cleaning in San Lorenzo means working through crawl-space access points that haven’t been opened since the Bohannon build era. We run a camera down every duct run before and after, so the deliverable is a documented photo record, not a vague promise. Pricing is written before any panel comes off, per Haven Standard Clause 1. Full details are on the Air Duct Cleaning in San Lorenzo page.
HVAC Cleaning in San Lorenzo
HVAC cleaning here goes beyond the ducts: the blower wheel, evaporator coil, and plenum in these original systems have typically accumulated decades of particulate. We photograph each component before and after, and the written scope itemizes every part of the system that gets cleaned. The full breakdown is on the HVAC Cleaning in San Lorenzo page.
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.
BeforeAfterDryer Vent Cleaning in San Lorenzo
Dryer vent cleaning in San Lorenzo almost always comes down to the same picture: a short metal run from a utility-room dryer through a crawl space, packed with lint and often partially crushed where the Bohannon-era floor framing settled. The damp marine air that filters through the Hayward hills gaps in winter turns that lint into a dense, matted plug that holds moisture against the vent walls. Lint burns at over 400°F, and a restricted vent turns every drying cycle into a heat source the original builders never accounted for. Our crews clean and photograph every run before and after, and the written price comes before the work. See how we handle it on the Dryer Vent Cleaning page.
Dryer Vent Inspection
Signs you need it
Clothes take two cycles to dry, the dryer exterior runs hotter than normal, or the laundry room smells musty when the machine is on.
What it costs in San Lorenzo
Dryer vent inspection in San Lorenzo costs between $89 and $145 when booked as a standalone visit.
How we do it
We run a camera from the dryer connection to the exterior termination, checking for crushed sections, lint accumulation, rodent entry points, and disconnected joints.
Lint Removal
Signs you need it
Visible lint around the exterior vent cap, longer drying times, or a dryer that shuts off mid-cycle from its thermal overload switch.
What it costs in San Lorenzo
Lint removal in San Lorenzo typically runs $115 to $210 depending on run length and how packed the vent has become.
How we do it
We use a Rotobrush rotary system with negative-pressure extraction to pull compacted lint out of the entire run, then camera-verify no blockage remains.
What Dryer Vent Cleaning Costs in San Lorenzo
| Item | Typical range in San Lorenzo |
|---|---|
| Dryer vent inspection | $89 - $145 |
| Lint removal | $115 - $210 |
| Vent rerouting | $240 - $390 |
How often should a dryer vent be cleaned in San Lorenzo?
Every year, and more often if your vent runs through a crawl space. The fog-season moisture and aged metal runs in San Lorenzo homes mean lint packs faster here than in newer construction.
Can a clogged dryer vent really start a fire?
Yes. Lint ignites at over 400°F, and a restricted San Lorenzo vent turns every cycle into a heat source. Cleaning removes the fuel and restores airflow. Call (806) 606-6902 for a written quote.
Duct Repair & Sealing in San Lorenzo
Duct repair and sealing in San Lorenzo means reaching into pier-and-beam crawl spaces where 70-year-old sheet metal has rusted at the seams and early flex duct has collapsed under its own weight. The damp ground-level environment that defines Alameda County plain housing stock corrodes joints, invites rodents to nest at boot connections, and leaves return-air boxes drawing unconditioned crawl-space air. Sealing those leaks is the difference between a system that heats the living room and one that heats the dirt below the floorboards. Our approach is documented and priced in writing before the first panel opens. Details are on the Duct Repair & Sealing page.
Duct Sealing
Signs you need it
Rooms that never reach the thermostat setting, dust accumulating faster than normal, or utility bills that climb without a change in usage.
What it costs in San Lorenzo
Duct sealing in San Lorenzo typically costs $350 to $700 per system depending on accessible duct length and how many joints need mastic.
How we do it
We pressure-test the duct system, locate leaks with a smoke or aerosol tracer, and seal every joint with mastic sealant applied over the metal or flex collar.
Flex Duct Repair
Signs you need it
A section of flex duct has detached from a register boot, is crushed flat under debris, or has been chewed through by rodents in the crawl space.
What it costs in San Lorenzo
Flex duct repair in San Lorenzo runs $180 to $340 per section, including reconnection, support strapping, and joint sealing.
How we do it
We remove the damaged section, install new R-6 or R-8 flex duct to match the original sizing, reconnect with proper clamps, and seal both ends with mastic.
What Duct Repair & Sealing Costs in San Lorenzo
| Item | Typical range in San Lorenzo |
|---|---|
| Duct sealing per system | $350 - $700 |
| Flex duct repair per section | $180 - $340 |
| Metal duct repair per section | $220 - $420 |
How do I know if my ducts are leaking in San Lorenzo?
Dust accumulating within days of cleaning, rooms that never match the thermostat, and a crawl space that smells like the living area are reliable indicators in San Lorenzo homes.
Is duct sealing worth the cost for an older Bohannon home?
Yes, because the original sheet-metal runs in San Lorenzo were never vapor-sealed, and every leaking joint pulls damp crawl-space air into the living area. Call (806) 606-6902 for a written scope.
Air Quality & Sanitizing in San Lorenzo
Air quality and sanitizing in San Lorenzo addresses what the fog-season marine layer leaves behind: mold colonization and bacteria inside original sheet-metal ducts that sit inches above damp soil in pier-and-beam crawl spaces. Those ducts pull ground-level moisture into the return path every time the blower runs, and the result is a persistent musty smell that no amount of filter changes resolves. We treat the duct surfaces, not just the air. Every job ends with a documented photo record of the treated runs, so the work is visible. See the full process on the Air Quality & Sanitizing page.
Mold Treatment
Signs you need it
Visible microbial growth inside the ducts, a persistent earthy or musty odor from the registers, or allergy symptoms that improve when you leave home.
What it costs in San Lorenzo
Mold treatment in San Lorenzo ranges from $450 to $900 depending on the number of affected duct runs and whether the plenum is involved.
How we do it
We apply an EPA-registered antimicrobial to all accessible interior duct surfaces using a fogging process, then run a HEPA-filtered air scrubber to capture airborne spores.
Odor Removal
Signs you need it
A smell that returns within days of cleaning, especially when the system switches from heating to cooling, points to absorbed odor in the duct lining or fiberglass insulation.
What it costs in San Lorenzo
Odor removal in San Lorenzo falls between $200 and $380 per system, depending on duct length and odor source.
How we do it
We use a thermal fogging system to neutralize absorbed odors at the source inside the ductwork, followed by an Abatement Technologies HEPA air scrubber to clear residual particulates.
What Air Quality & Sanitizing Costs in San Lorenzo
| Item | Typical range in San Lorenzo |
|---|---|
| Mold treatment | $450 - $900 |
| Odor removal per system | $200 - $380 |
| Bacteria sanitizing per system | $280 - $520 |
Does sanitizing get rid of the musty smell in San Lorenzo homes?
Yes, when the odor is microbial and the source is inside the ductwork. If duct insulation has absorbed moisture, replacement may be needed. A camera inspection gives us the answer.
Can I just clean the ducts instead of sanitizing?
Cleaning removes debris; sanitizing addresses the microbial layer that causes odor and allergy reactions. Older San Lorenzo ducts often need both. Call (806) 606-6902 for a written plan.
Brands We Service in San Lorenzo
We service and clean all major duct and HVAC equipment brands, with common replacement parts for Rotobrush and Nikro equipment stocked locally on our service vans. For a full list of supported manufacturers, see our brands page.
Pricing for Air Duct Cleaning in San Lorenzo, CA
| Service | Typical range in San Lorenzo |
|---|---|
| Dryer vent inspection | $89 - $145 |
| Lint removal | $115 - $210 |
| Vent rerouting | $240 - $390 |
| Duct sealing per system | $350 - $700 |
| Flex duct repair per section | $180 - $340 |
| Metal duct repair per section | $220 - $420 |
| Mold treatment | $450 - $900 |
| Odor removal per system | $200 - $380 |
| Bacteria sanitizing per system | $280 - $520 |
Prices in San Lorenzo run higher than in newer nearby construction because the work happens in tight crawl spaces with 70-year-old duct runs that frequently need sealing before cleaning can begin. Every job is priced in writing before work starts, so the number you approve is the number you pay.
Neighborhoods We Serve in San Lorenzo
We serve the entire San Lorenzo CDP, including its distinct grid-street neighborhoods. The Bohannon-era tract sections all share similar duct layouts, so our crews move efficiently between stops.
- San Lorenzo Village
- Del Rey
- Bayview
- Upper San Lorenzo
- Meadowbrook
Service Area - Cities Near San Lorenzo
If you’re in a neighboring community, we also serve Castro Valley, CA, San Leandro, CA, Union City, CA, and Oakland, CA. Crews are dispatched from our San Francisco Bay Area office, and scheduling covers the entire Alameda County plain.
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
We schedule San Lorenzo jobs Monday through Saturday, and most homeowners book within three to five business days. The written photo record and pricing are prepared on site. Call (806) 606-6902 for the next available slot.
No permit is required for routine cleaning, sanitizing, or sealing work in San Lorenzo. If a repair involves replacing duct runs, it typically falls under standard work that does not need a building permit in Alameda County.
Yes. Most San Lorenzo ductwork is accessible only through crawl-space entry points, and our technicians work in those conditions regularly. We photograph every run from inside so you can see the result
If your San Lorenzo home needs air duct cleaning, dryer vent work, duct repair, or sanitizing, call (806) 606-6902 for a written price before any work begins. Every job ends with a documented photo record of the work.
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
"The before and after photographs of each run are the reason I used them. You cannot argue with what came out of the return."
- Marguerite O."Flat price agreed up front, no per-vent add-ons at the end. That was the whole reason I did not call the coupon company."
- Suzanne B."The dryer vent was almost completely blocked with lint. They showed me the photograph and I understood immediately why the dryer had been running twice."
- Lucia M.