Air Duct Cleaning in Los Altos, CA
Air duct cleaning in Los Altos typically costs $450-$950 for a full residential system, with most jobs completed in a single visit by our background-checked, uniformed technicians. We’re familiar with the ranch-style homes that define this city, and we know the crawl spaces beneath them. If you’re in 94022, 94023, or 94024, call (855) 401-6006 and we’ll give you an honest price before we start.
Why Los Altos Homes Are Different
Los Altos is almost entirely single-family residential, dominated by 1950s-1970s ranch-style homes whose ductwork runs through unconditioned crawl spaces beneath the slab or raised foundation. These crawl spaces accumulate winter moisture, rodent debris, and decades of biological growth that feeds directly into living areas. The city’s extreme property values have fueled constant high-end renovations that blast construction dust into those same aging duct systems.
The mild but damp winters push crawl-space humidity above 70%, promoting mold colonization on duct exteriors and insulation that homeowners rarely inspect. The 2018 Camp Fire and 2020 fire season forced weeks of recirculated HVAC operation, driving fine particulate deep into duct systems where standard filters never reached it. Ranch homes along Loyola Corners and South Los Altos corridors face additional pressure from the Rancho San Antonio preserve, where mice and rats push toward foundations and nest inside flex-duct runs, voiding manufacturer warranties on recently replaced systems.
Air Duct Cleaning in Los Altos
Most Los Altos homeowners who call us haven’t had their ducts cleaned in fifteen years or more. They’re noticing dust reappearing on furniture within a day of wiping, allergy symptoms that worsen when the furnace kicks on, or a musty smell every time the system cycles. Our Air Duct Cleaning service starts with a camera inspection of the full duct run, because the age and construction of Los Altos housing stock creates too many variables to clean blindly.
Residential Duct Cleaning
Most Los Altos homes were built between 1950 and 1975 as low-slung ranch-style tract developments, and many still have original ductwork. Our residential cleaning starts with a full video inspection, then we use Rotobrush agitation equipment to dislodge debris from the entire run, from supply registers to return plenum. We serviced a 1960s ranch on Loyola Corners where decades of rodent nesting in flex-duct runs had voided the system’s warranty. A full system cleaning with Rotobrush agitation ran $650-$950, and we recommended a retrofit to sealed metal ductwork to prevent future intrusion.
Supply Duct Cleaning
Supply ducts push conditioned air into your rooms, and in Los Altos ranch homes these runs often travel through crawl spaces where humidity exceeds 70% in winter. We clean the full supply trunk and branch lines, then check for external condensation or biological growth that would re-contaminate the system. If we find deteriorating fiberglass liner, we’ll tell you before we proceed. Some liner can be cleaned safely for $350-$550. Some can’t. The camera decides.
Return Duct Cleaning
Return ducts pull air back to your HVAC unit, and they collect the most debris. In Los Altos, where wildfire smoke from the 2018 Camp Fire and 2020 season forced residents to run HVAC on recirculate for weeks, return ducts often harbor fine particulate that standard filters never captured. We clean the full return path using negative-air containment so nothing escapes into your home. Most return duct cleaning in Los Altos runs $350-$550 as a standalone service.
How much does air duct cleaning cost in Los Altos?
Full residential system cleaning in Los Altos typically runs $450-$950, depending on system size, accessibility, and whether we find conditions like deteriorated liner or active rodent infestation that need addressing first. We disclose everything before we lift a tool. Call (855) 401-6006 for a free estimate - the number we give on the phone is the number on your invoice.
Can you clean ducts in older Los Altos homes without damaging them?
Yes, but not with one-size-fits-all methods. Deteriorating fiberglass liner in 1950s-1970s ranch homes releases harmful particulates when brushed at full speed. We camera-inspect first, then adjust our Rotobrush speed or switch to gentler Nikro pneumatic methods for fragile liner. We’ve made this call in hundreds of Los Altos homes. The camera footage lets you see exactly what we’re working with before we start.
Dryer Vent Cleaning in Los Altos
Dryer vent cleaning in Los Altos typically costs $149-$289 for a standard single-family home, and most appointments are completed in under two hours. If your dryer is taking longer than one cycle to dry towels, or if you notice a burnt-lint smell near the laundry room, the vent line is likely obstructed. Our Dryer Vent Cleaning service addresses the salt air, crawl-space humidity, and rodent pressure that make Los Altos vent jobs different from inland work.
Vent Cleaning and Lint Removal
A standard Los Altos home builds up 2-3 pounds of lint annually in the vent line, even with regular trap cleaning. In the 94022 and 94024 ZIP codes, we see worse accumulation when salt-corroded dampers seize partially shut, trapping humid exhaust air that mats lint against duct walls. Our Rotobrush system scrubs the full diameter, then our Nikro high-velocity vacuum extracts it. Standard dryer vent cleaning runs $149-$189 for a single-family ranch with ground-floor laundry.
Vent Rerouting
Many Los Altos ranch homes were built with dryer vents running through unconditioned crawl spaces beneath the slab or raised foundation. These spaces hit 70% humidity in winter, and metal duct connections rust through. We’ve rerouted dozens of vent lines in South Los Altos to shorter, straighter exterior paths that eliminate crawl-space exposure entirely. Most reroutes run $350-$550 and solve the root problem permanently.
Vent Cap Replacement
The standard builder-grade vent hood has a thin galvanized damper that corrodes solid within 3-5 years of coastal fog exposure. We stock stainless-steel replacement caps with low-profile hoods that shed water and resist salt crystallization. We cleaned a dryer vent on Loyola Corners where the exterior hood was rusted solid, trapping lint behind the damper. Replacement with a stainless-steel Guardsman hood and installation ran $89-$149.
How often should I have my dryer vent cleaned in Los Altos?
Every 12-18 months for most Los Altos homes, and every 9-12 months if you dry more than five loads weekly or have pets that shed. The salt air here accelerates vent cap corrosion, so we recommend an annual inspection of the exterior hood even if the vent line itself is clear. Call (855) 401-6006 to schedule - estimates are free.
Why does my dryer still take long to dry after I cleaned the lint trap?
The lint trap catches roughly 60% of lint; the remaining 40% passes through and accumulates in the vent line, exterior hood, or damper mechanism. In Los Altos, we frequently find the trap is clean but the exterior cap is salt-seized shut. A full vent cleaning with camera inspection finds the real obstruction. Call (855) 401-6006 for a free estimate.
HVAC Cleaning in Los Altos
HVAC cleaning in Los Altos typically costs $380-$720 for a full system, with most jobs completed in a single visit. Our technicians know the area: the 1950s-1970s tract homes along El Monte Road, the original air handlers that were never designed for modern MERV-13 filters, and the wildfire particulate still embedded from 2018 and 2020. Our HVAC Cleaning service treats the full system, not just the ducts.
Evaporator Coil Cleaning
The evaporator coil is where moisture collects and where construction dust from that kitchen renovation three years ago probably still circulates. In our experience, this is the most overlooked component in mid-century ranch systems. We clean the coil with low-pressure foaming agents and soft brushes, then apply an antimicrobial treatment that inhibits regrowth through damp winter months. Evaporator coil cleaning alone runs $180-$290.
Blower Wheel Cleaning
In Los Altos, blower wheels are particularly contaminated in homes that ran on recirculate during the 2020 wildfire smoke event - fine particulate bypasses standard filters and adheres to blower blades. We use compressed air and soft brushes, never aggressive scraping that could imbalance the wheel. An unbalanced blower vibrates, wears bearings, and makes the rumbling noise that prompts so many Los Altos service calls. Blower wheel and air handler cleaning runs $150-$240.
Condenser Coil Cleaning
Your outdoor condenser coil battles pollen from the mature oak canopy, dust from dry summer hills, and cottonwood fluff in late spring. We fin-comb damaged coils, apply foaming cleaner, and rinse with low-pressure water - never high-pressure, which folds aluminum fins and reduces heat transfer. For properties with condensers tucked against redwood privacy screens, we clear vegetation debris that traps moisture. Condenser cleaning runs $120-$195.
Why do Los Altos ranch homes have rodent intrusion in their ducts?
The mature landscaping and adjacent open-space foothills of the Rancho San Antonio preserve create natural corridors that direct mice and rats toward foundations. In the Loyola Corners and South Los Altos corridors especially, these rodents enter crawl spaces and nest inside flex-duct runs, shredding material for bedding and blocking airflow. We see this pattern on roughly one in three Los Altos jobs. Call (855) 401-6006 if you’re hearing scratching or smelling must during HVAC operation.
Will duct cleaning fix the musty smell from my crawl space?
Duct cleaning alone often won’t eliminate musty odors if the source is mold on duct exteriors or standing moisture in the crawl space itself. We address this with our full-system approach: cleaning the evaporator coil and air handler, applying antimicrobial coil treatment, and identifying crawl-space moisture sources that need separate remediation. In Los Altos’s damp winters, we regularly find humidity exceeding 70% beneath raised foundations. We’ll tell you honestly whether cleaning alone will solve it.
Duct Repair & Sealing in Los Altos
Duct repair and sealing in Los Altos typically costs $280-$650 for most residential jobs, with work available throughout the 94022, 94023, and 94024 ZIP codes. Our team reaches homes from North Los Altos to South Los Altos and the Loyola Corners area, and we’re familiar with the crawl-space configurations and original ductwork found in the city’s 1950s-1970s ranch stock. Our Duct Repair & Sealing service fixes what’s broken and seals what leaks.
Duct Sealing
Los Altos homes lose 20-30% of conditioned air through leaks on average, and in older ranch homes with original sheet-metal systems, that number climbs higher. We seal with mastic sealant and metal-backed tape, not duct tape, because seasonal humidity swings in Los Altos crawl spaces - regularly exceeding 70% in winter - degrade lesser materials within a season. Basic duct sealing with mastic, up to 10 joints, runs $280-$420.
Flex Duct Repair
Flex duct in Los Altos crawl spaces faces a specific threat: rodents from the Rancho San Antonio preserve push toward foundations, especially in the Loyola Corners and South Los Altos corridors. We repaired a flex-duct run near Loyola Corners where rodent intrusion had chewed through the duct lining, causing 30% airflow loss. Using mastic sealant and matched components, we restored performance. Flex duct repair or section replacement runs $340-$580.
Metal Duct Repair
The original galvanized sheet-metal ductwork in Los Altos’s 1950s-1970s homes was built to last, but the fiberglass liner inside wasn’t. As that liner disintegrates - accelerated by renovation dust events - it releases fibers and accumulated debris into living spaces. We repair metal ducts by removing degraded liner, sealing the metal shell properly, and relining or replacing sections as needed. This specialized work typically runs $450-$650.
How does the rodent intrusion pattern in Los Altos affect duct repair?
Rodents from the Rancho San Antonio preserve push toward Los Altos foundations, especially in Loyola Corners and South Los Altos, where they nest inside flex-duct runs and chew through lining. This damage voids manufacturer warranties on standard flex duct and requires replacement with rodent-resistant materials plus protective sleeving - repairs that run $340-$580 in this market. Call (855) 401-6006 for a camera inspection if you suspect intrusion.
What’s the best sealing approach for Los Altos’s original 1950s sheet-metal ducts?
A two-part mastic sealant process is necessary because Los Altos’s unconditioned crawl spaces experience humidity swings above 70% in winter, which cracks single-coat applications. We remove any degraded fiberglass liner first, then seal joints with mastic and metal-backed tape rated for damp conditions. The full process typically runs $450-$650. We show you the before-and-after camera footage so you understand what was done.
Air Quality & Sanitizing in Los Altos
Air quality and sanitizing service in Los Altos typically runs $350-$950 depending on home size and contamination level, with most jobs completed in a single visit. Our team arrives with Rotobrush and Abatement Technologies equipment ready to treat ranch-style homes from Loyola Corners to South Los Altos without a return trip. Our Air Quality & Sanitizing service addresses mold, bacteria, and persistent odors at their source.
Mold Treatment
Los Altos’s mild, damp winters create ideal conditions for mold colonization on duct exteriors and insulation in crawl spaces. We’ve treated homes near Rancho San Antonio where crawl-space humidity exceeded 70% for months, spreading mold through fiberglass duct liner original to a 1967 build. Our mold treatment uses EPA-registered products applied after mechanical agitation and HEPA vacuuming. Mold treatment with mechanical cleaning runs $600-$950.
Bacteria Sanitizing
After rodent intrusion - common in Loyola Corners and South Los Altos ranches adjacent to open space - bacteria sanitizing is non-negotiable. We use professional-grade application equipment from Nikro to distribute sanitizing agents throughout the duct system, including branch lines that standard cleaning misses. This isn’t a surface spray. It’s a calculated treatment based on duct layout, contamination level, and airflow patterns specific to your home’s original design. Bacteria sanitizing after rodent intrusion runs $450-$700.
UV Light Installation
UV light installation is particularly effective in Los Altos’s ranch homes with crawl-space ductwork. Germicidal lamps mount at the air handler or in strategic duct locations, continuously suppressing mold and bacterial growth on coils and duct surfaces. For homes near the Rancho San Antonio Preserve or along Foothill Expressway where rodent and moisture issues recur, UV lights provide ongoing protection between professional cleanings. We specify Honeywell and Aprilaire units. Installation runs $400-$650.
Is UV light installation effective after rodent or mold contamination?
Yes, UV light installation is particularly effective in Los Altos’s crawl-space ranch homes where moisture and biological growth recur. The germicidal lamps continuously suppress mold and bacterial regrowth on coils and duct surfaces between professional cleanings. We typically recommend UV installation following mold treatment or post-rodent sanitizing in homes near the foothills or with chronically damp crawl spaces. Call (855) 401-6006 for a free assessment of your system’s configuration.
Can you treat my ducts after a recent renovation in Los Altos?
Yes, post-renovation sanitizing is one of our most common Los Altos services. High-end gut renovations throughout the 94022 and 94024 ZIP codes frequently blast construction dust into aging duct systems that haven’t been cleaned in decades. We perform full mechanical cleaning, HEPA vacuuming, and sanitizing to remove drywall dust, insulation particles, and VOC residue. Camera verification before and after documents the improvement. Schedule a free estimate at (855) 401-6006.
Brands We Service in Los Altos
We stock parts and specify equipment from Rotobrush, Abatement Technologies, Honeywell, and Aprilaire - the same brands serious HVAC contractors use. Most repairs that require a part we don’t carry on the van are sourced within 24 hours through our San Francisco Bay Area office. See our brands for full details.
Pricing for Air Duct Cleaning in Los Altos, CA
| Service | Typical range in Los Altos |
|---|---|
| Video inspection only | $149 (waived with cleaning) |
| Supply or return duct cleaning (single system) | $350-$550 |
| Full residential system cleaning | $450-$950 |
| Commercial system cleaning | $800-$1,400 |
| Duct repair/sealing (per hour, if needed) | $185-$225 |
| Standard dryer vent cleaning | $149-$189 |
| Dryer vent rerouting (crawl-space to exterior) | $350-$550 |
| Evaporator coil cleaning | $180-$290 |
| Full HVAC system cleaning | $380-$720 |
| Basic duct sealing (mastic, up to 10 joints) | $280-$420 |
| Metal duct repair with liner removal | $450-$650 |
| Mold treatment with mechanical cleaning | $600-$950 |
Prices move toward the higher end in Los Altos when crawl-space access is limited, when rodent damage requires protective materials, or when original fiberglass liner from the 1950s-1970s must be handled with extended labor time. We disclose your exact price before we lift a single tool - the number we quote on the phone is the number on your invoice.
Neighborhoods We Serve in Los Altos
We work throughout Los Altos, from the tree-lined streets of Old Los Altos near downtown to the hillside properties approaching Los Altos Hills. Most appointments are scheduled within two business days. Our technicians know the specific crawl-space configurations, original duct materials, and rodent pressure patterns that vary by area.
- Old Los Altos (near downtown, Foothill Expressway corridor)
- South Los Altos (94024, near Loyola Corners)
- North Los Altos (94022, Grant Road and El Monte Avenue area)
- Rancho (adjacent to Rancho San Antonio preserve)
- Loyola Corners (mature landscaping, elevated rodent activity)
Service Area - Cities Near Los Altos
Our crews serve Los Altos locally, with dispatch and scheduling coordinated from our San Francisco Bay Area office. We also work in Los Altos Hills, CA, Mountain View, CA, Stanford, CA, Sunnyvale, CA, and Cupertino, CA. If you’re unsure whether your address falls within our service area, call (855) 401-6006 and we’ll confirm directly.
Serving Los Altos, CA - Our Local Coverage Area
Bellows Air Duct & Vent Co. of California crews serve Los Altos and the communities around it; dispatch is coordinated from our San Francisco Bay Area office. The map shows the Los Altos coverage area; if your address is on it, we can help.
Also serving nearby: Los Altos, CA, Los Altos Hills, CA, Mountain View, CA, Stanford, CA, Sunnyvale, CA, Cupertino, CA.
FAQs About Air Duct Cleaning in Los Altos
Most residential duct cleaning and sealing does not require a permit in Los Altos, but significant duct replacement or modifications to the HVAC plenum may need Santa Clara County review. We handle permit research as part of our estimate process when structural changes are involved, and we’ll tell you upfront if your job requires one. Call (855) 401-6006 to discuss your specific project.
We camera-inspect before and after every job, and you receive the video file for your records. In Los Altos’s older ranch homes, this documentation is especially valuable because it shows liner condition, rodent damage, and construction debris that visual inspection alone would miss. No claim without proof - that’s our standard on every job.
Most Los Altos homes benefit from professional duct cleaning every three to five years. Homes with original fiberglass duct liner, recent renovations, or recurring rodent issues may need more frequent service - every two to three years. After wildfire seasons with prolonged unhealthy-air events, we recommend inspection even if you’re not on a standard cycle. Our $89 Seasonal Tune-Up includes a camera inspection that tells you where you stand.
Ready to get your ducts handled right? Call Bellows Air Duct & Vent Co. at (855) 401-6006 for a free estimate. A live person answers the phone 24 hours a day, and we’ll be there when we say. One honest price, shown before we start. Camera-verified results. And our 90-Day Done Right Promise in writing - if it’s not right, we make it right, no paperwork, no arguing.
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 Los Altos Customers Say
"The allergies in this house had been bad since we moved in. It has been a couple of months since they did the ducts and it is noticeably better. Not a miracle, but real."
- Vikram Rao"Two guys, about three hours, plastic down at every register, and they wiped the vent covers before putting them back."
- Grace Chen"The job was done well and the house smells better. There was some dust knocked loose around a couple of the registers that I had to wipe down afterward."
- Jodi Ackerman