Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Fast, Reliable Air Duct Cleaning Across San Lorenzo
Air duct cleaning in San Lorenzo typically costs $390 – $780 for a full single-family system, with most jobs completed in four to six hours. If your home sits in the San Lorenzo Village core or off Hesperian Boulevard and still runs its original 1950s galvanized ductwork, the work takes longer and costs toward the higher end because the metal needs careful handling, not aggressive agitation. Our crews know the difference. We drive into San Lorenzo from Union City, and we’ve worked these post-war tract homes enough to know what’s behind the hallway grille before we even pull it. Call (877) 824-3121 for a straight answer and a free estimate.
Why Duct Cleaning Union City Is San Lorenzo’s Preferred Air Duct Cleaning Company
San Lorenzo is a specific place. It’s not Hayward, it’s not Castro Valley, and it’s sure not the new-build subdivisions further east. The housing stock here is dominated by late 1940s and 1950s tract homes, Eichler-influenced ranches and conventional single-story layouts, sitting on flat lots between Hesperian and the bay. That means the ductwork we clean here is almost never modern flex duct. It’s original galvanized steel trunk lines, often with asbestos-wrapped joints, running to floor registers fed by a central gravity or early forced-air furnace closet. Our team, led by Nelson Abreu, has built this business around knowing how to clean those systems without damaging them. We get called back to San Lorenzo because we don’t treat a seventy-year-old metal plenum like it’s a plastic tube in a 2010 townhouse.
San Lorenzo homeowners tell us the same thing after we finish: the airflow at the floor registers finally matches what the original system was designed to deliver. That’s the outcome that matters here. Not a coupon price, not a 45-minute blow-and-go. We use Rotobrush and Nikro professional duct cleaning equipment, set up negative pressure with HEPA filtration, and inspect what we’re touching before we touch it. That sequence matters on original 1950s ductwork. If you want the full picture of how we work across the area, start with our Air Duct Cleaning team page. For local specifics, this San Lorenzo page covers exactly what we see in this town.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
Ductwork Cleaning in San Lorenzo
Ductwork Cleaning in San Lorenzo means something different from what it means in a newer city. Most homes here were built between the late 1940s and the mid-1950s, and the ductwork is typically original galvanized steel. The job isn’t a quick vacuum pass. It’s a careful, sequenced process: inspect the trunk lines and joints first, flag any asbestos-wrapped connections, set up negative pressure, agitate the interior surfaces with the right tools for aged metal, then clean the supply runs, the return runs, the plenum behind the hallway grille, and finally the blower motor and registers. In San Lorenzo, a full ductwork cleaning on a 1,200-square-foot ranch typically runs $450 – $700. Larger homes or systems with heavy pest debris or decades of matted dust push toward $800.
Supply and Return Duct Cleaning
On a 1950s San Lorenzo system, the supply ducts carry heated air from the furnace closet out to the floor registers in each room. The return ducts pull air back through the hallway grille and into the plenum behind it. Both sides need attention. We clean the supply runs first, then the return side, because the return plenum in these older homes is almost always the dirtiest part of the system.
Full System Cleaning With Video Inspection
A full system cleaning includes every part of the duct path: the trunk lines, the branch runs, the return plenum, the air handler, and the registers. We camera-inspect before and after. If you’re in the San Lorenzo Village area and you’ve never had the original ducts cleaned, the before footage is usually the proof you need that the job was worth doing.
Air Duct Inspection in San Lorenzo
Air Duct Inspection in San Lorenzo is the service we recommend before any cleaning on a 1940s or 1950s system. The inspection is not a sales pitch. It’s a camera run through the supply and return ducts, a look at the trunk line joints for asbestos wrap or separation, and a check of the return-air plenum behind the hallway grille. We do this because original galvanized systems can’t take rough treatment. If we find damaged sections, the inspection tells us what needs repair before cleaning starts, or whether cleaning should proceed with extra care around wrapped joints. A standalone inspection in San Lorenzo runs $150 – $250, and we credit that amount toward the cleaning if you book both.
Return Plenum and Grille Check
This is the step most San Lorenzo duct cleaners skip. The return grille in the hallway usually hides a plenum that hasn’t been opened since the furnace was installed. In these homes, that’s where decades of dust matting and occasional rodent debris collect. We open it, inspect it, and show you what’s there before we clean it.
Pre-Purchase Duct Inspection
If you’re buying a home in San Lorenzo, especially one that’s never been remodeled, get the ducts inspected before you close. A camera run will tell you if the original galvanized trunk lines are still intact, whether any joints are wrapped with asbestos material, and whether the system has been cleaned at any point in the last seventy years. The findings give you a negotiating position or at least a clear plan for what the system needs.
Trusted Brands We Service in San Lorenzo
Most San Lorenzo homes still have whatever furnace and duct system the original builder installed, but the ones that have been upgraded usually carry equipment from Honeywell or Aprilaire, and we also provide San Lorenzo Trane service for systems with that brand. We work around both. When a homeowner has added an Aprilaire media filter to an old gravity-era air handler, we check that the blower can actually pull air through it. When a Honeywell electronic air cleaner is installed, we make sure the ducts downstream aren’t recontaminating the air the cleaner already treated. We also work with Abatement Technologies equipment on the filtration side, which matters on systems where the dust load is heavy. When a San Lorenzo system needs a repair during cleaning, we handle it on the spot through our Air Duct Repair service. You don’t need a second contractor, and you don’t need to wait a week.
See the difference
Before
After
Before
After
Before
AfterCommon Air Duct Cleaning Problems We See in San Lorenzo Homes
- Asbestos-wrapped joints on original trunk lines. Many 1950s San Lorenzo systems used asbestos tape or wrap at the duct connections. Aggressive agitation cracks those joints open and releases fibers. We flag them first and clean around them with controlled methods.
- Packed return plenums behind the hallway grille. The return-air plenum in these tract homes is a dust trap. We’ve pulled grilles off on Via Del Rey and found the plenum packed with matted dust and rodent debris. Skipping this area means the worst contamination stays in the system.
- Gravity-furnace-era airflow problems. These systems were designed for low resistance and simple filters. When a homeowner adds a modern high-MERV filter without upgrading the blower, airflow drops at the registers. Cleaning helps, but we’ll tell you honestly if the problem is the filter, not the dust.
- Floor registers sealed over by carpet or flooring. Decades of remodeling in San Lorenzo ranches means some supply registers get covered. We find them during inspection and mark them so airflow can be restored before or after cleaning.
Pricing for Air Duct Cleaning in San Lorenzo, CA
Here’s the honest range for San Lorenzo. A typical 1,100 to 1,600-square-foot ranch with original ductwork runs $450 – $700 for a full system cleaning. A larger home or one with a heavily contaminated return plenum, pest debris, or multiple additions runs $700 – $900. If your home has never been cleaned and the system is original, expect the higher end. We give one flat price per system before work starts. No per-vent pricing, and no surprise add-on invoice when the van is parked in your driveway. Call (877) 824-3121 and we’ll give you a real number based on what you describe, then confirm it with the inspection.
We Also Serve Cities Near San Lorenzo
Our service area includes Air Duct Cleaning work throughout the East Bay, and we regularly take calls from San Lorenzo, Ashland, Cherryland, Fairview, and Union City. Each area has its own housing stock, but the 1940s and 1950s tract homes in San Lorenzo and Cherryland share the same ductwork issues. We plan routes that get us to your door without a week-long wait.
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
Yes, if the cleaning is done by a crew that knows what they’re looking at. We inspect every original galvanized trunk line before we run agitation tools, and we flag asbestos-wrapped joints so they’re handled with care, not force. The sequence is negative pressure first, controlled agitation second, and camera inspection of the supply and return sides before we touch the air handler. Call (877) 824-3121 to schedule an inspection first so we can tell you exactly what your system needs.
Almost certainly. In San Lorenzo tract homes, the return plenum behind the hallway grille is the most common source of musty odors. It collects decades of dust matting and sometimes pest debris, and when the furnace fan runs, that smell moves through the house. We open the grille, inspect the plenum, and clean it as part of a full system cleaning. If you’re smelling it now, call (877) 824-3121 and we’ll take a look.
Every four to six years is typical for a 1950s system in San Lorenzo, but the first cleaning after decades of neglect should happen sooner. These original systems were never designed for modern filtration, so dust accumulates faster than in newer sealed ductwork. After the first thorough cleaning, a four-to-five-year interval keeps airflow steady and the return plenum from packing up again. Call us for a free estimate and we’ll check your system’s condition.
It’s possible. Many original 1950s systems in this area used asbestos tape or wrap at the trunk line joints. We don’t test for asbestos, but we visually identify wrapped joints and treat them as if they contain it, which means we avoid disturbing them and clean around them with controlled methods. If the wrap is damaged, we’ll tell you before we start and recommend how to handle it. Don’t let a generalist blow through those joints without looking.
Our inspection includes a camera run through the supply and return ducts, a look at the trunk line joints and any wrap material, a check of the return plenum behind the hallway grille, and an assessment of the air handler and filters. It runs $150 – $250 in San Lorenzo, and there’s no obligation to book cleaning afterward. If you do book cleaning, we credit the inspection fee toward the job. Call (877) 824-3121 for an exact quote.
Written by Nelson Abreu, Owner at Duct Cleaning Union City, serving San Lorenzo and the surrounding East Bay.