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.
Fast, Reliable Air Duct Cleaning Across Los Altos Hills
Air duct cleaning in Los Altos Hills typically runs $450 – $950 for a full system on a standard hillside home, and the work is scheduled, not rushed. If you’re noticing dust settling back on surfaces within days of wiping them, a musty smell when the HVAC kicks on, or debris near your return grilles, the problem is usually deeper than the registers you can see. Our Air Duct Cleaning team knows exactly what those long attic and crawlspace duct runs collect over time in this specific terrain. Call (737) 727-2314 and we’ll give you a written price before a single duct is touched.
Why Cardinal Air Duct Cleaning Is Los Altos Hills’s Preferred Air Duct Cleaning Company
We work on homes along Page Mill Road, up toward the Foothills Park boundary, and across the winding lanes around Stonebrook Drive where attics get hot and duct runs stretch long. Los Altos Hills parcels are large, the setbacks are deep, and the mechanical systems are often zoned for square footage that surprises people. That means a few things for duct cleaning. First, the work takes real time if it’s done properly, not a 45-minute walkthrough. Second, the return side and air handler matter just as much as the supply registers. Most homeowners in Los Altos Hills have never seen the inside of their return ducts, and honestly, neither had we until we started camera-inspecting them regularly.
We don’t ask you to trust a vague promise. We hand you a written price before any work begins, and our techs arrive in uniform with their name on the booking. Omar Haddad built this operation around one idea: nobody in Los Altos Hills should hand over money for duct work they can’t verify. That’s the Relay Standard. You get a live trackable arrival window, before-and-after photos of your actual ducts, and a digital invoice you can pay from your phone. If the work isn’t done right within 365 days, we come back and correct it at no charge. That’s the 365-Day Done Right Promise. It applies to every booking.
Local homeowners tell us the same things. They’ve had quotes that doubled at the door. They’ve had techs who never touched the return side. They’ve had per-vent pricing that made no sense on a 5,000-square-foot hillside home with three zones. We price per system, not per vent. That alone changes the conversation.
Vent Cleaning in Los Altos Hills
Vent cleaning in Los Altos Hills means going after the debris that settles in the low points of long attic and crawlspace duct runs, not just wiping register covers with a rag. Most of our calls here start with a homeowner noticing dust on furniture, or a return grille that looks like it’s growing a gray beard. The real work happens inside the duct system, where years of construction dust, rodent debris, and fine particulate from Santa Cruz Mountain foothill air settle and compact. On a hillside property, the return static climbs as that debris accumulates, and the blower motor starts working against resistance it was never designed for.
A full vent cleaning in Los Altos Hills runs $450 – $950 depending on system size and zone count. We don’t quote per vent. We quote per system, and the written price covers the supply runs, the return runs, the air handler interface, and a camera inspection of what we actually removed.
Supply and Return Runs
Supply ducts push conditioned air out. Return ducts pull it back. Both matter, but returns are where the filth collects first because negative pressure draws air, dust, and anything airborne straight into them. In Los Altos Hills, return runs often pull from hallways and open living areas near hillside doors, so they collect more than the supplies do. We clean both sides every time.
What a Real Cleaning Removes
We use Rotobrush agitation tools under negative pressure so loosened debris goes into a Nikro HEPA vacuum, not back into your living room. That is the difference between source removal and a surface wipe. We camera-inspect the runs before and after and photograph the results. You see what we saw.
Air Duct Repair in Los Altos Hills
Air duct repair in Los Altos Hills usually involves flex-duct joints that have torn, sagged, or separated in hot attic spaces, which is common on hillside homes where the roofline catches full afternoon sun. A routine cleaning can turn into a repair job fast if the tech spins a brush past a failing joint and tears it open. That’s a failure mode we’ve seen from other companies in this area. We check run integrity before we start, not after. If a run fails during cleaning, we flag it, show you the photo, and give you a written repair price before any fix is made.
Duct repair pricing in Los Altos Hills typically falls between $180 and $650 for a single failing joint or section, depending on accessibility and the run’s location. Crawlspace runs cost more than attic runs because access is tighter and work is slower. We never bury a repair fee in a cleaning invoice. Separate price, written in advance.
Detached and Separated Runs
Older hillside homes in Los Altos Hills often have duct systems that were installed decades ago and modified during remodels. Runs get disconnected, kinked, or crushed. A disconnected run means conditioned air spills into the attic instead of the bedroom. Fixing it is straightforward once we find it, and our camera inspection does exactly that.
Air Handler Interface Issues
The transition between the duct system and the air handler is where static pressure problems show up first. If the Aprilaire filter is clogged and the return plenum is pulling hard, debris collects right at the coil and blower. We clean that interface during every full system cleaning and repair it if the flex connector has torn or slipped off.
Trusted Brands We Service in Los Altos Hills
We service and work alongside the equipment Los Altos Hills homeowners actually have. Aprilaire filters and media cabinets are common in the larger custom systems up here, and they do a good job when they’re not fighting a return restriction. Abatement Technologies containment units are part of our fleet because hillside homes often have tight mechanical closets where we need to manage airflow during cleaning. Guardsman filtration products come up on the post-cleaning side when a homeowner wants better ongoing particulate control. We stock replacement filters and common repair parts for these brands locally, which means we’re not scheduling a second trip just to fetch a component from a supply house across the Bay.
Common Air Duct Cleaning Problems We See in Los Altos Hills Homes
- Long attic runs with debris in the low points. On a sloped hillside lot, ducts run parallel to the grade, so dust settles in the dips and stays there. A quick brush job never touches it, and the debris just re-settles within weeks.
- Return side neglect. We see this constantly: supplies look clean, returns are full. If the blower motor keeps pulling debris from a dirty return, you haven’t fixed anything.
- Rodent debris in crawlspace runs. Hillside crawlspaces with open vents and deep setbacks are rodent highways. Droppings and nesting material in the ducts are a real issue up here, and they require HEPA extraction, not a shop vac.
- Torn flex-duct joints from careless cleaning. We’ve followed other companies’s work on Los Altos Hills properties and found runs torn open at the joints. A routine cleaning turns into a hidden repair, and the homeowner never knew. We inspect before we spin.
Pricing for Air Duct Cleaning in Los Altos Hills, CA
A standard full-system air duct cleaning in Los Altos Hills runs $450 – $950 for a single-zone home with typical duct runs. Two- and three-zone systems, which are common on larger hillside parcels, push toward the upper end or slightly beyond depending on square footage and access. The price is per system, not per vent. That’s the critical distinction. A company quoting per vent on a home with 25 registers will almost always end up near or above our flat price by the time they finish, and you’re doing arithmetic at the door instead of knowing the number up front. Our written price covers supply runs, return runs, the air handler interface, camera inspection, and before-and-after photos. If the work isn’t right within 365 days, we return and correct it at no charge. Call (737) 727-2314 and get a straight number in writing before anything starts.
We Also Serve Cities Near Los Altos Hills
While this page is focused on Air Duct Cleaning in Los Altos Hills, our crews also cover nearby markets throughout the Bay Area and beyond. If you’re in San Jose, San Francisco, Los Angeles, or San Diego, you can reach us at the same number and we’ll route you to the right crew for your area. The pricing model is the same everywhere: one flat rate per system, written before we start.
Serving Los Altos Hills, CA - Our Local Coverage Area
We’re based in the Los Altos Hills 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 Los Altos Hills
Flat rate, always. We price the full system: supply runs, return runs, the air handler interface, and the camera inspection. You get one written number before we start, and it doesn’t change at the door. Per-vent pricing on a hillside home with multiple zones usually ends up higher than a flat per-system quote once all the runs are counted. Call (737) 727-2314 for an exact quote on your Los Altos Hills home.
For most homes here, every 4 – 7 years is reasonable. That’s not a sales line; it’s the honest interval for a system that runs seasonal heating and cooling with moderate use. If you’ve just finished a major remodel, if you had rodent activity in the crawlspace, or if your return grilles are visibly coated, you’re likely due sooner. We’ll tell you straight if the system doesn’t need cleaning yet. That’s part of the deal.
We agitate the duct walls with Rotobrush tools under negative pressure, which means the loosened debris goes directly into a Nikro HEPA vacuum rather than back into your rooms. We clean both supply and return sides, clear the air handler interface, and then camera-inspect the runs. You receive before-and-after photos of your own ducts before we leave. On hillside homes with long runs, this takes real time, not a quick pass.
Yes, if the smell and debris are coming from the duct system or the air handler interface. We pulled a system off a hillside property near Arastradero Road where the return static was so high the Aprilaire filter and blower motor were fighting a mat of accumulated debris. Rotobrush agitation under HEPA-filtered negative pressure cleared it, and we photographed every run before and after. If the smell persists after a genuine cleaning, the source is elsewhere, and we’ll tell you that too.
No, and we won’t promise it. A proper duct cleaning on a Los Altos Hills home with long attic and crawlspace runs is a scheduled job. Rushing it means skipping the return side or missing a failing flex joint. We’ll get you on the calendar quickly, and you’ll have a live trackable arrival window so you’re not waiting around for a four-hour block. Call (737) 727-2314 to schedule and we’ll confirm the written price before any work begins.
Ready for clean ducts in Los Altos Hills? Call Cardinal Air Duct Cleaning at (737) 727-2314 for a free estimate and a written price before any work starts. You’ll get a live trackable arrival time, before-and-after photos of your actual ducts, and the 365-Day Done Right Promise backing every job.
Written by Omar Haddad, Owner at Cardinal Air Duct Cleaning, part of the Relay Home Co. family serving Los Altos Hills and the surrounding Bay Area since 2005.




Before
After
Before
After
Before
After