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.
Trusted Air Duct Repair for Mountain View Homeowners
Mountain View homes push conditioned air through ductwork for thousands of hours every year. When that ductwork leaks, collapses, or separates, you’re paying to heat and cool the attic, the crawlspace, and the space between your floors. Air duct repair in Mountain View is about restoring that closed system so every dollar you spend on HVAC actually reaches the rooms you live in. Duct Cleaning Mountain View has built its reputation on one thing: we show up with professional-grade equipment, we diagnose the actual problem, and we fix it without inventing work you don’t need. Call (866) 528-3938 to schedule an inspection.
Our Service Area Near Mountain View
We work throughout Mountain View and the surrounding Peninsula and South Bay communities, from Palo Alto to Cupertino. You’ll also find us regularly in Los Altos, Sunnyvale, Menlo Park, Redwood City, Campbell, and West San Jose. When you call, we’ll give you a straight answer on scheduling: our team routes jobs by neighborhood, so we’re not guessing at drive times or availability. Call (866) 528-3938 and we’ll tell you exactly when we can be there.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
HVAC Duct Installation
HVAC Duct Installation is the process of routing new ductwork from your furnace or air handler to the rooms of your home, sized and sealed so the system moves the right volume of air at the right static pressure. You need it when you’re adding square footage, converting a garage or attic, or replacing ductwork that’s beyond repair. We install rigid and flexible duct to manufacturer spec, seal every joint with mastic and foil tape (never duct tape, which fails within years), and verify airflow at each register before we call the job done. Whole-home installation in Mountain View typically runs $4,000-$9,000 depending on home size, duct length, and accessibility. A single branch run added to an existing trunk line runs $400-$1,200. Call (866) 528-3938 for an exact quote after we inspect your home.
New Construction and Additions
If you’re adding a room or finishing an attic in Mountain View, Air Duct Repair – Mountain View includes making sure the new space gets duct runs that match the existing system’s static pressure. Undersized or oversized branch lines throw the whole system out of balance, leaving the new room hot while the rest of the house runs cold. We calculate duct diameter and airflow requirements before cutting a single opening.
System Replacement Integration
When you replace a furnace or air handler, the new unit often has different airflow characteristics than the old one. Existing ducts may be too small, too leaky, or poorly laid out for the new equipment. We inspect the entire duct system during any HVAC changeover and replace or resize runs so the new unit performs to its rating.
Air Duct Replacement
Air Duct Replacement means removing damaged or deteriorated ductwork and installing new runs in its place, rather than patching the old material and hoping for the best. You need it when ducts are crushed, rusted through, saturated with moisture, or so full of mold and debris that cleaning can’t restore them. We cut out the failed section, install new duct sized to the room’s airflow requirement, seal it properly, and re-balance the system. Partial replacement in Mountain View typically runs $800-$2,500 per run depending on length, diameter, and how much of the run is accessible. Full-home replacement runs $4,000-$9,000. Call (866) 528-3938 after checking the signs below and we’ll give you an honest assessment of whether replacement is actually necessary.
When Replacement Beats Repair
Some duct damage is patchable: a separated joint, a small tear, a disconnected boot. But ductwork that’s been crushed by a contractor’s boot in the attic, or soaked by a roof leak, or chewed through by rodents isn’t coming back. We’ll always show you the damage before recommending replacement. If the duct’s integrity is gone, a patch is just scheduled failure.
Material Selection
We install rigid galvanized steel where code and your home’s layout call for it, and R-6 or R-8 insulated flex where runs need to bend through tight attic and crawlspace framing. Each material has a place. We’ll explain why we’re recommending one over the other for your specific run, and you’ll see the difference in our before-and-after documentation.
Ductwork Repair
Ductwork Repair is the targeted restoration of specific faults in your existing duct system: separated joints, disconnected boots, punctures, crushed sections, loose hangers, and failed seals. It’s the right call when your ducts are fundamentally sound but leaking air in specific places. We locate the failure with a combination of visual inspection and, where needed, a manometer to measure pressure loss. Targeted repairs in Mountain View typically run $250-$700 for a single fault like a separated joint or crushed run, and $600-$1,800 for multiple failures across a system. Call (866) 528-3938 if you suspect your ducts are leaking; the repair is almost always cheaper than the energy you’re losing.
Sealing Leaky Joints
This is the most common Air Duct Repair – Cupertino and Mountain View service we provide. Over years of heating and cooling cycles, the tape and mastic at duct joints crack, peel, and fail. Air escapes into unconditioned space. We re-seal with mastic and foil tape, not hardware-store duct tape, and test the repair with a smoke pencil or pressure reading to confirm the leak is closed.
Restoring Crushed or Collapsed Runs
Flexible ductwork is easily crushed when someone works in the attic or crawlspace, or when it wasn’t supported properly at installation. A crushed run restricts airflow, which strains your blower and starves the room it serves. We’ll either re-round the duct if the inner liner is intact, or replace the section if the damage is permanent.
Duct Replacement
Duct Replacement is the complete removal and reinstallation of all or most of the ductwork in your home, typically because the system has reached the end of its service life or was poorly installed originally. You need it when ducts are 20-30 years old, heavily damaged, or so leaky that the system is losing a significant portion of its conditioned air. We map your existing layout, identify the failures, and design a replacement that matches your HVAC equipment’s airflow requirements. Full-home duct replacement in Mountain View typically runs $4,000-$9,500, with cost driven by home size, number of runs, accessibility, and whether we’re working in a crawlspace or attic. Call (866) 528-3938 for an exact quote after we inspect your system.
Whole-System Rebuilds
When a duct system fails throughout, piecemeal repairs stop making sense. You’re chasing leaks and paying for return trips. A whole-system replacement gives you ductwork that’s sized correctly, sealed correctly, and balanced correctly from day one. We document the entire process so you can see exactly what was installed and where.
Upgrading Old or Undersized Ducts
Many Los Altos Air Duct Repair and Mountain View homes built before modern HVAC standards have ducts that were undersized from the start, or that have been added onto over decades without regard for airflow. If your system runs constantly, struggles to reach set temperature, or has rooms that never feel right, the ducts may simply be too small. Replacement with properly sized runs is the real fix.
Ductwork Installation
Ductwork Installation is the design and installation of a complete duct system, either for a new build or as part of a significant remodel where no existing ductwork serves the space. It’s different from replacement in that we’re working from nothing, or from a partial system that’s being extended. We start with a room-by-room load calculation, then design trunk and branch lines to deliver the right CFM to each register. Complete installation for a typical Mountain View home runs $4,500-$10,000 depending on square footage and system complexity. Call (866) 528-3938 and we’ll walk your space and give you a detailed, written estimate.
Design and Sizing
Duct sizing isn’t guesswork. Too small, and your blower works against resistance it wasn’t designed for. Too large, and air velocity drops to the point where rooms don’t get conditioned air. We calculate duct diameter, run length, and register placement from your HVAC system’s rated CFM and the room’s heat load. The design is saved with your job file.
Code-Compliant Installation
Mountain View’s building codes govern duct support spacing, sealing requirements, insulation R-value, and clearance from combustibles. We install to current code on every job, and we pull permits where the scope requires them. You shouldn’t have to ask whether the work meets code; it should be assumed, and with us, it is.
See the difference
Before
After
Before
After
Before
AfterBrands We Service
We work with Honeywell and Aprilaire air quality products regularly. Honeywell’s media air cleaners and Aprilaire’s whole-home purification systems integrate directly into your ductwork, and we understand how they interact with the rest of the system. If you’re installing new ducts or repairing existing runs, that’s the right moment to consider whether your filtration needs an upgrade too. We’ll tell you honestly whether your current setup is adequate, and what adding one of these systems would actually accomplish.
Whether you have Honeywell, Aprilaire, or any other make already installed, we can help. Our focus is the duct system itself; we approach these products as part of that system, not as an upsell we’re trying to attach to your invoice.
Signs You Need a Pro Right Now
- Dust re-appears within days of cleaning. If you dust on Sunday and it’s back by Wednesday, your ducts are leaking and pulling unfiltered air from the attic or crawlspace. That dust is what’s inside your walls and under your floor, and it’s being delivered to every room. The fix is sealing or replacing the failed duct, not dusting more often.
- Rooms that never reach temperature. When one bedroom runs hot and another runs cold no matter what you do to the thermostat, the problem isn’t the furnace. It’s almost always a crushed, disconnected, or poorly sized duct run. We find the restriction and fix it at the source.
- Energy bills climbing with no obvious reason. Leaky ducts bleed conditioned air. If your usage is up but nothing else has changed, you’re paying to condition air that never reaches a register. A duct inspection is cheap compared to another year of that.
- Sounds coming from the vents. Rattling, banging, or flapping noises when the system runs point to loose hanging straps, separated joints, or debris inside the duct. Ignoring it lets the damage spread; a separated joint under pressure gets worse every cycle.
- Moisture or musty odor near registers. Condensation inside a duct, or a crawlspace leak that’s found its way into the system, creates the conditions for mold. If the air smells off, stop running the system and call us. We’ll trace the source and tell you what needs repair versus what needs replacement.
Our Process, Step by Step
- Inspection and Diagnosis. We start by walking your system: registers, accessible duct runs, the air handler, and the attic or crawlspace. We’re looking for separated joints, crushed sections, failing tape, moisture, evidence of rodents, and pressure imbalances. We use a manometer to measure static pressure, which tells us whether the system is laboring against restrictions it shouldn’t have.
- Written Scope and Price. Before any work begins, you get a written scope of what we found, what we recommend, and exactly what it costs. No vague line items, no “we’ll see once we open it up.” If we find something unexpected during the work, we stop and call. You approve any change before we proceed.
- Targeted Repair or Replacement. We fix what’s broken: re-seal joints, re-hang loose sections, replace crushed runs, reconnect boots. We use mastic and foil tape on every joint. Replacement materials are cut and fitted on site, not pulled from a pile of pre-made scrap.
- Verification. After the repair, we re-test. Static pressure reading, smoke pencil at the suspect joints, or a simple register-by-register airflow check. If the numbers don’t confirm the fix, we’re not done.
- Documentation and Cleanup. You get photos of the before and after on every significant repair. We remove debris and old materials from the attic or crawlspace. And you get a clear explanation of what was done, why, and what to expect going forward.
How Much Does Air Duct Repair Cost in Mountain View?
A typical air duct repair in Mountain View runs $250-$700 for a single fault such as a separated joint, a crushed flex run, or a disconnected boot. Multiple failures across a system run $600-$1,800. If the damage is extensive enough that replacement makes more sense, partial replacement runs $800-$2,500 per run, and full-home replacement runs $4,000-$9,500. Three factors drive most of the price difference: accessibility (attic and crawlspace work takes longer than basement or garage work), the number of runs affected, and whether we’re repairing galvanized steel or replacing failed flex duct. The way to avoid overpaying is simple: get a written scope before the work starts. Our estimates are free, and they include the diagnosis, the exact scope of work, and a firm price. No per-vent pricing, no teaser number that becomes something else later. Call (866) 528-3938 and we’ll schedule the inspection.
Serving Mountain View, CA – Our Local Coverage Area
We’re based in the Mountain View area and also provide Air Duct Repair in Palo Alto, and we know this community well. Use the map below to see our service coverage – if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Air Duct Repair in Mountain View
Air duct repair is the restoration of a duct system’s integrity: sealing leaks, reconnecting separated joints, re-hanging sagging sections, and replacing crushed or damaged runs so conditioned air reaches the rooms it’s intended to serve. It’s a structural fix, not a cleaning service. At Duct Cleaning Mountain View, we handle both, so when we find damage during a cleaning, we can repair it on the spot instead of referring you elsewhere.
A single targeted repair like a separated joint or crushed flex run typically takes 1-2 hours on site. Multiple repairs across a system can take half a day. Full-home duct replacement takes 1-3 days depending on home size and accessibility. We’ll give you a realistic timeframe when we inspect the job.
Expect $250-$700 for a single fault and $600-$1,800 for multiple repairs. Partial replacement runs $800-$2,500 per run. Full replacement runs $4,000-$9,500. The best way to know your exact cost is an inspection, and our estimates are free. Call (866) 528-3938 and we’ll give you a firm written price before any work starts.
Yes. We work with Honeywell media air cleaners and Aprilaire whole-home purification systems regularly, and we understand how they integrate with ductwork. If your duct repair creates an opportunity to upgrade filtration, we’ll tell you. We won’t sell you one you don’t need.
Some situations genuinely can’t wait: a duct sucking crawlspace air into a baby’s room, moisture actively pooling in the system, or a collapsed run that’s starving your furnace. We prioritize these calls. If you’re uncertain whether your situation is urgent, call (866) 528-3938 and describe what you’re seeing. We’ll tell you straight whether it can wait for a normal appointment or needs immediate attention.
Our workmanship is backed by a warranty on the specific repairs we make. The scope and term are written into your job documentation before work begins. We don’t hide behind fine print; if our repair fails, we come back and make it right.
Clear a path to your HVAC equipment and any attic or crawlspace access points. If you have pets, secure them during the visit. We’ll bring drop cloths and shoe covers, and we’ll photograph everything before and after. You don’t need to move furniture; we work in the mechanical spaces, not the living room.
Schedule Your Air Duct Repair Service in Mountain View Today
Leaky, crushed, or disconnected ducts don’t fix themselves, and every week you wait is another week of paying to condition air you never feel. Call Duct Cleaning Mountain View at (866) 528-3938 for a free, no-obligation estimate. We’ll inspect your system, show you exactly what’s wrong, and give you a firm price before any work begins. Serving Mountain View and the surrounding Peninsula and South Bay communities.
Written by Dave Hanson, Owner at Duct Cleaning Mountain View, serving Mountain View and the surrounding Peninsula since day one.