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.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
See the difference
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After
Before
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Before
AfterHow Much Does Duct Repair & Sealing Cost in Mountain View?
Duct repair and sealing in Mountain View typically runs $350 to $1,850, with most single-family homes landing between $550 and $950 for sealing and moderate repairs. Small patch jobs and single-joint seals start around $250 to $400, while full duct replacement or major re-routing in older downtown and Rex Manor homes can climb past $2,500. The final number depends on how much of the system is leaking, what it’s made of, and how hard it is to reach.
We’re a duct specialist, not a general HVAC company, so we quote this work every week in Mountain View. Below is what the 2026 market actually looks like, line by line, so you can budget before anyone shows up at your door.
Key Takeaways
- Most Mountain View duct sealing jobs fall in the $550 to $950 range.
- Leaky ducts in a typical Bay Area home waste roughly 20 to 30 percent of the air your system moves.
- Repair costs more than cleaning because we’re fixing structure, not just removing debris.
- Older homes near downtown and the Rex Manor area often need partial duct replacement, not just sealing.
- Free estimates are available – call (866) 528-3938.
Duct Repair & Sealing Cost Breakdown (2026)
Here’s how the line items price out in Mountain View this year. These are real ranges we work with locally, not national averages pulled from a directory.
| Service | Typical Price Range |
|---|---|
| Diagnostic inspection / leak test | $95 – $175 (often credited toward repair) |
| Sealing individual joints and seams | $250 – $450 |
| Whole-system sealing (mastic + foil tape) | $450 – $1,100 |
| Sealing with duct sealant and protective finish (Guardsman products) | $550 – $1,250 |
| Flex duct section replacement (per run) | $180 – $350 |
| Sheet metal duct repair / reconnection | $300 – $750 |
| Full duct replacement (per run, including labor) | $400 – $900 |
| Registers, boots, and takeoff repairs | $150 – $400 each |
| Dryer vent repair (crushed or disconnected) | $175 – $425 |
| Post-repair air balancing / pressurization check | $120 – $280 |
What pushes a quote up? Attic and crawlspace access is the biggest factor in Mountain View. A single-story ranch home with a wide, clear attic is fast to work in. A two-story with tight knee walls, a low-pitch roof, and duct runs buried under blown-in insulation takes longer and costs more. Duct material matters too: sheet metal repairs run higher than flex, and older galvanized systems in pre-1960s homes sometimes need sections cut out and rebuilt rather than patched. Add in a few weeks of hot, dry Silicon Valley summer and the system has been working hard, which usually means more than one leak point.
We use professional air duct services built around Rotobrush and Nikro equipment. When we’re making repairs, our Abatement Technologies HEPA filtration keeps dislodged dust and insulation particles contained instead of blowing them through your living room.
What Affects Duct Repair & Sealing Pricing in Mountain View
- Duct material and age. Homes built before 1970 in the downtown and Old Mountain View neighborhoods often have original sheet metal or early flex duct. Aging foil-backed flex gets brittle in our dry summers and tears at the joints, so repairs turn into replacement runs.
- Attic and crawlspace access. Mountain View has a mix of single-story Eichlers, two-story builds, and older bungalows. Low-clearance attics and cramped crawlspaces slow work and raise the labor portion of any quote.
- Number of leak points. A single failed joint takes an hour. Twenty leaks scattered across the system take a day. Sealing costs scale with how many locations we have to reach and treat.
- Rodent or pest damage. Raccoons and roof rats get into attic ductwork more than people realize, especially in older neighborhoods near Stevens Creek and the greenbelt corridors. Torn flex and chewed insulation mean we’re replacing sections, not just sealing them.
- Whether cleaning is needed first. You can’t seal a dirty duct effectively. If your system hasn’t been cleaned in years, we often bundle air duct cleaning in Mountain View with the repair, which usually saves you money over booking both separately.
- System size and layout. A 3-bedroom home with 8 or 9 supply runs costs less than a 4-bedroom with a zoned system and 14 runs. Larger systems mean more joints, more registers, and more labor.
How to Save on Duct Repair & Sealing
There’s no way to make this work free, but a few practical moves keep the bill reasonable.
- Get a leak test before agreeing to anything. A technician who quotes you a big number without showing you where the leaks are is guessing. Ask to see the test results and the actual problem spots.
- Bundle cleaning and repair. Handling both in one visit usually costs less than two separate appointments, and there’s no point sealing a duct that’s still full of debris.
- Fix leaks now, not after they spread. A leaking joint that goes ignored can soak insulation, warp sheet metal, and eventually push cool air into the attic all summer. Small repairs are cheaper than replacements.
- Check whether a protective finish is worth it. We incorporate Guardsman-brand products into some finishing steps, which can extend the life of a repaired section and sometimes reduces repeat visits.
- Ask about air quality add-ons if you already have them. If you run a Honeywell or Aprilaire filter or humidifier, mention it. Sealing around those components is part of the job and we can confirm compatibility during the estimate.
Estimates are free, and we’ll tell you plainly whether you’re looking at a $400 seal job or a $1,500 replacement. Call (866) 528-3938 to schedule.
Why Duct Repair Costs What It Does
People ask us all the time why a “simple” duct fix costs a few hundred dollars when a roll of foil tape is ten bucks at the hardware store. The tape is cheap. The labor, equipment, and safe access are not.
A real repair involves more than taping a seam. We run a diagnostic to find where the system is leaking (many leaks aren’t visible from the access panel), pull the section or access it from the attic, clean and prep the surface, seal the joint with mastic or contractor-grade foil tape, and check airflow afterward to confirm the fix held. That’s before anyone climbs back out. Add the HEPA containment we run during the work, the care needed around electrical and gas lines in tight attic spaces, and the fact that we don’t send one technician when the job needs two, and you start to see where the cost comes from.
We cover air ducts, dryer vents, and duct repair as separate services because they fail in different ways. A dryer vent that’s crushed or disconnected is a different repair than a leaking supply run. Pricing them together as one “HVAC service” obscures what’s actually being done.
Does Duct Sealing Pay for Itself in Mountain View?
Often, yes – and for a measurable reason. Across the Bay Area, leaky ducts waste somewhere in the range of 20 to 30 percent of the conditioned air your system produces. In a Mountain View summer where the AC runs from June through October, that’s real money on your PG&E bill. Sealing a leaky system usually pays back within a few cooling seasons, especially in older homes with aging ductwork.
The other payoff is comfort. Sealed ducts mean the room at the end of the house stops being five degrees warmer than the rest of it. That complaint is one of the most common we hear, and it’s almost always a duct problem, not a thermostat or equipment problem.
When Repair Makes More Sense Than Replacement
If the ducts are structurally sound and the leaks are localized – a torn flex section, a failed joint, a damaged register boot – repair is the right call and costs a fraction of replacement. If the system is 25 or more years old, running original flex that’s brittle and collapsing, or if you’re finding multiple rodent-chewed runs, repair starts to look like throwing money at a problem that will keep coming back. We’ll tell you which situation you’re in before you commit to either.
For the full scope of what repair involves, see our Duct Repair & Sealing in Mountain View page.
FAQs About Duct Repair & Sealing Cost in Mountain View
How much does duct sealing cost in Mountain View?
Whole-system duct sealing in Mountain View typically runs $450 to $1,100, with most homes landing around $700. Sealing individual joints starts at roughly $250. Call (866) 528-3938 for an exact quote – estimates are free.
Is it cheaper to repair or replace ductwork?
Repair is almost always cheaper up front – typically $300 to $900 per problem area versus $400 to $900 per run for full replacement. But if more than a few runs need work, replacement may cost less over time. The break-even usually sits around 25 to 30 percent of the system needing repair. Call (866) 528-3938 and we’ll give you an honest read.
Can you repair ducts and clean them in the same visit?
Yes – and we recommend it. Bundling cleaning and repair usually saves you money over two appointments, and a duct has to be clean before it can be sealed properly. Most combined jobs in Mountain View run $650 to $1,300 depending on the home.
How long does duct repair and sealing take?
Most residential sealing and minor repair jobs take 3 to 6 hours in a single-family Mountain View home. Full run replacements or jobs with attic access issues can take a full day. We tell you up front so you can plan around it.
Will sealing leaky ducts actually lower my energy bill?
Usually 10 to 20 percent, because sealed ducts stop losing the air you already paid to cool. In older Mountain View homes with aging ductwork, the savings tend to be at the higher end. Call (866) 528-3938 to schedule a leak test and see where your system stands.
How Much Does Duct Repair & Sealing Cost in Nearby Cities?
Pricing shifts a little depending on the city because of home age, attic access, and permit requirements. We also publish current pricing for Palo Alto, Sunnyvale, Los Altos, Cupertino, and Santa Clara if you want to compare. If you’re a property manager covering multiple sites across the service area, call and ask about multi-property pricing.
What to Expect When We Show Up
Our technicians arrive with Rotobrush and Nikro cleaning systems and Abatement Technologies HEPA filtration on the truck, not a shop vacuum. We inspect the system, show you what we find, and quote the repair before any work begins. No surprise line items. If you have questions about Honeywell or Aprilaire equipment already in the home, we’ll take a look while we’re there.
Get a Free Estimate in Mountain View
Duct repair pricing in Mountain View doesn’t have to be a mystery. We’ll test the system, find the leaks, and give you a written number before we touch anything. Call (866) 528-3938 for a free estimate, whether you’re facing a $400 seal job or a bigger repair. Our team will walk you through the options and tell you plainly what’s needed and what can wait.
Pricing reflects the Mountain View market as of 2026. Duct Cleaning Mountain View offers free estimates – call (866) 528-3938.
What Our Customers Say
"They photographed every return and supply before starting and sent me the file afterward. No upsell to a sanitizing treatment I didn't need."
- Tim Ziegler"Quoted per system rather than the bait and switch per vent pricing everybody else in town uses. The number I was told on the phone was the number on the invoice."
- Carmen Delgado"Two guys, about three hours, plastic down at every register, and they wiped the vent covers before putting them back."
- Maria Salazar