Fast, Reliable Air Duct Cleaning Across Los Altos
Air duct cleaning in Los Altos typically runs $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.
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. We’ve been driving to Los Altos since 1984, and we know the difference between a home off El Camino Real and one tucked up near the Rancho San Antonio preserve. That local knowledge changes what we bring, what we check, and how we protect your home while we work.
Why Bellows Air Duct & Vent Co. of California Is Los Altos’s Preferred Air Duct Cleaning Company
We’ve served the Santa Clara Valley for over 42 years, and Los Altos has been part of our route since the beginning. Roger Castañeda and our team have cleaned ducts in the original ranch tracts near Loyola Corners, in the hillside homes off Magdalena Avenue, and throughout South Los Altos where the mature oak canopy meets the open-space foothills. Homeowners here don’t want a coupon technician who changes the price at the door. They want someone who shows up when promised, explains what they found, and leaves a written guarantee.
Our 90-Day Done Right Promise is stamped on every job. If it’s not right, we make it right. No paperwork, no arguing. We also answer calls with a live person, 24 hours a day. Not a voicemail tree, not an app. When your ducts smell musty after the first winter rain, you want to talk to someone who can dispatch a technician, not leave a message and hope.
Every clean includes camera inspection before and after. You see what we see. That matters in Los Altos, where many homes have original sheet-metal or early flex-duct systems with deteriorating fiberglass duct liner from the 1960s and 1970s. A camera shows whether standard cleaning is safe or whether the liner has degraded to the point where agitation would release harmful particulates into your living areas. We don’t guess. We look.
Our Air Duct Cleaning Services in Los Altos
Residential Duct Cleaning
Most Los Altos homes were built between 1950 and 1975 as low-slung ranch-style tract developments. 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. We performed a full system cleaning with Rotobrush agitation, then recommended a retrofit to sealed metal ductwork to prevent future intrusion, preserving the home’s air quality during a $400k renovation. That’s the kind of situation we see regularly in Los Altos, and it’s why we don’t quote over the phone without asking about your home’s age and duct material.
Commercial Duct Cleaning
While Los Altos is predominantly residential, we do clean ductwork for the professional offices along San Antonio Road and the retail spaces near the Village. Commercial systems typically use heavier-gauge metal and different access points, but the same principle applies: inspect first, clean with the right equipment, verify after. Our Nikro and Abatement Technologies commercial-grade vacuums handle larger CFM requirements, and we schedule around your business hours to avoid disrupting patients, clients, or staff.
Supply Duct Cleaning
Supply ducts push conditioned air into your rooms. In Los Altos ranch homes, these runs often travel through crawl spaces where humidity regularly exceeds 70% in winter, promoting mold colonization on duct exteriors and insulation. 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 with any agitation. Some liner can be cleaned safely. 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 fire 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, including the grille, boot, and plenum connection, using negative-air containment so nothing escapes into your home during the process.
Full System Cleaning
This is our most thorough service, and it’s what most Los Altos homes need. Full system cleaning covers supply ducts, return ducts, trunk lines, plenums, and the air handler cabinet. We bring in our Rotobrush and Nikro equipment, establish containment, and run the full job with before-and-after camera documentation. Most full system cleans in Los Altos take 4-6 hours and are completed in a single visit. The typical range is $650-$950, depending on system size and accessibility.
Video Inspection
We won’t clean what we haven’t seen. Our video inspection service uses a self-leveling camera head that travels the full duct run, recording in 1080p. In Los Altos, this step has caught hidden mold colonies behind deteriorating liner, rodent carcasses in flex-duct voids, and construction debris from recent renovations that homeowners didn’t realize had entered the system. The inspection fee is $149 if you choose not to proceed with cleaning, but it’s waived when you book the full service. You receive the video file for your records.
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.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Los Altos
We clean and maintain duct systems connected to all major HVAC brands, and we stock common fittings and access panels for faster turnaround on Los Altos jobs. Our equipment comes from Rotobrush, Nikro, and Abatement Technologies, the same brands serious HVAC contractors specify when they install new systems. For air quality upgrades after cleaning, we install Aprilaire and Honeywell media filters and whole-home purifiers. We don’t sell what we wouldn’t use in our own homes. If your Los Altos ranch has an aging Carrier, Trane, or original Lennox system, we’ve likely serviced its ductwork before and know the access points.
Common Air Duct Cleaning Problems We See in Los Altos Homes
- Crawl-space rodent debris re-contaminating cleaned ducts. Ranch homes along the Loyola Corners and South Los Altos corridors frequently show rodent intrusion in crawl-space ductwork. Mice and rats from the Rancho San Antonio preserve nest inside flex-duct runs and void manufacturer warranties on recently replaced systems. We always inspect for entry points and recommend sealing before or alongside cleaning.
- Fiberglass liner deterioration releasing particulates during standard cleaning. The vast majority of Los Altos homes have original sheet-metal or early flex-duct systems with deteriorating fiberglass duct liner from the 1950s-1970s era. Using standard vacuum-only cleaning on aging fiberglass-lined ducts releases harmful particulates into living areas. We check liner condition with our camera first and adjust our method or recommend replacement when needed.
- Hidden mold colonies missed without video inspection. Los Altos’s mild but damp winters mean crawl-space humidity regularly exceeds 70%, promoting mold colonization on duct exteriors and insulation. Failing to conduct a video inspection before cleaning means missing these colonies, which require specialized remediation beyond standard cleaning.
- Wildfire smoke particulate deep in duct systems. Los Altos sits in the interior Santa Clara Valley, where dry northerly winds during fall fire season funnel Bay Area wildfire smoke. The 2018 Camp Fire and 2020 fire season were particularly severe, forcing fine particulate deep into duct systems during prolonged unhealthy-air events. Standard filters don’t capture PM2.5, and recirculate mode just redistributes it.
Pricing for Air Duct Cleaning in Los Altos, CA
Here’s what air duct cleaning costs in the Los Altos market. These are the ranges we quote before we start, and they’re the numbers on your invoice.
| 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 | $650-$950 |
| Commercial System Cleaning | $800-$1,400 |
| Duct Sealing/ Repair (per hour, if needed) | $185-$225 |
What moves you within these ranges? System size, number of registers, crawl-space accessibility, and whether we find conditions that need addressing before safe cleaning, like deteriorated liner or active rodent infestation. We disclose everything before we lift a tool. No bait coupons, no price changes at the door. Call (855) 401-6006 for a free estimate tailored to your Los Altos home.
We also honor a permanent 5% Senior and Veteran discount, and we offer a $50 discount on any repair over $250. If you have a written estimate from another company, we’ll give you a free second opinion.
We Also Serve Cities Near Los Altos
Our technicians regularly work in Los Altos Hills, Mountain View, Stanford, and Sunnyvale. If you’re in one of these neighboring communities and your home shares the same ranch-style construction and crawl-space duct challenges, we bring the same equipment and the same upfront pricing. The drive from our dispatch point to Los Altos is familiar, and we schedule to minimize transit time so we arrive when we say we will.
Serving Los Altos, CA - Our Local Coverage Area
We’re based in the Los Altos 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 - Air Duct Cleaning in Los Altos
Your crawl space is holding moisture. Los Altos’s mild but damp winters push humidity above 70% in unconditioned crawl spaces, where mold colonizes duct exteriors and insulation. When your HVAC cycles, it pulls that musty air through any gaps or deteriorating liner. We find this in ranch homes throughout 94022 and 94024 every January through March. Call (855) 401-6006 and we’ll camera-inspect to locate the source before we clean, so the smell doesn’t return.
Don’t run your HVAC. Rodent carcasses release bacteria and attract insects, and the airflow will distribute both through your home. Call us. We remove the remains with containment protocols, clean and sanitize the affected duct runs with Rotobrush agitation and HEPA extraction, then inspect the full system for entry points. We see this pattern frequently near the Rancho San Antonio preserve and in mature neighborhoods like Loyola Corners. Estimates are free.
Sometimes, but not with standard agitation. Deteriorating fiberglass liner releases harmful particulates when brushed or air-whipped. We camera-inspect first to assess liner condition. If it’s intact but dirty, we use controlled low-pressure methods. If it’s breaking down, we recommend liner replacement or duct retrofit before cleaning. We’ve made this call in hundreds of Los Altos ranch homes built between 1950 and 1975. The camera footage lets you see exactly what we see.
Los Altos’s position in the interior Santa Clara Valley makes it a collection point for northerly wildfire smoke during fall fire season. The 2018 Camp Fire and 2020 season forced weeks of recirculated HVAC operation, driving PM2.5 deep into duct systems where standard filters never reached it. Homes in coastal cities with ocean breezes don’t see this concentration. We find residual wildfire particulate in Los Altos ducts years later, especially in return systems. Full cleaning with HEPA containment removes it.
Yes, and we include it in every job. The age and construction of Los Altos housing stock, original duct materials, and crawl-space conditions create too many variables to clean blindly. Our camera has found construction debris from recent renovations, hidden mold, and rodent damage that would have been made worse by proceeding without knowing. The inspection takes 20-30 minutes and gives you a permanent record. If you choose not to clean after seeing the video, the $149 inspection fee stands. Most homeowners book the full service once they see what’s inside.
Ready to see what’s in your ducts? Call Bellows Air Duct & Vent Co. of California at (855) 401-6006 for a free estimate. We’ll give you one honest price before we start, show you camera proof when we’re done, and stand behind our work for 90 days in writing. That’s how we’ve operated since 1984.
Written by Roger Castañeda, Owner at Bellows Air Duct & Vent Co. of California, serving Los Altos since 1984.