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
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AfterHow Much Does Duct Repair & Sealing Cost in Santa Clara?
Duct repair and sealing in Santa Clara typically runs $350 to $1,200 for most homes, with whole-house sealing projects landing around $1,800 to $3,500. A single disconnected joint or small leak usually gets fixed for under $400, while a larger repair involving crushed flex runs, torn insulation, or attic reconnection pushes toward the upper end. If your ducts were installed during the original build and have never been touched, expect to find more than one problem once we open things up.
Santa Clara homes face a specific set of challenges. The combination of hot, dry summers and moderate winters means ductwork flexes through thousands of thermal cycles over a decade, and the seals that were tight when the house was built tend to loosen. Add the region’s clay-heavy soil and the settling that comes with it, and you get a housing stock where return plenums and attic trunk lines are frequently the weak links. We’ve been called out to hundreds of homes across the South Bay and the pattern is consistent: the leak is rarely where the homeowner thinks it is.
We always start with an inspection. Whether you’re dealing with high utility bills, uneven room temperatures, or a home inspection report flagging duct concerns, the diagnosis shapes the quote. Our home page covers the full scope of what we handle. For the service itself, see our Duct Repair & Sealing in Santa Clara page.
Duct Repair & Sealing Cost Breakdown (2026)
Here’s what the line items actually look like in Santa Clara for 2026. These are practical ranges typical of the local market, not the lowest bid on a coupon flyer.
| Service | Typical Price Range (Santa Clara) |
|---|---|
| Full duct inspection and diagnostic (with camera) | $150 – $300 (often credited toward repair) |
| Sealing a single disconnected or leaking joint | $175 – $350 |
| Mastic + mesh sealing (per accessible joint) | $25 – $60 |
| Aeroseal-style whole-house duct sealing | $1,800 – $3,500 |
| Replacing a crushed or torn flex duct run | $250 – $550 per run |
| Sheet metal trunk repair or section replacement | $400 – $900 |
| Reconnecting a duct in the attic or crawlspace | $300 – $700 |
| Insulation repair or re-wrapping on duct runs | $200 – $600 |
| Return plenum repair | $350 – $800 |
| Full duct replacement (per zone / partial replacement) | $1,500 – $4,500 |
What pushes the number up? Accessibility is the big one. A duct that runs through a finished ceiling or a tight attic with limited clearance takes more labor than one in an open crawlspace. Material matters too: sheet metal lasts longer but costs more to repair than flex. And whether you go with manual mastic-and-mesh sealing or a duct-sealing process like Aeroseal comes down to how widespread the leaks are. Old 1970s and 1980s construction common in parts of Santa Clara often still has bare-metal truck lines that have been leaking for decades. Those projects run higher, but they’re also the ones with the biggest energy savings afterward.
What Affects Duct Repair & Sealing Pricing in Santa Clara
Every quote comes down to five or six moving parts. Here’s the practical version.
- Age and construction era of the home. Homes built in the 1960s and 1970s often have bare sheet-metal ducts with minimal insulation and taped joints that have long since failed. Homes from the 2000s onward more often use R-6 or R-8 flex, which can crush or disconnect but tends to cost less per run to fix.
- Attic vs. crawlspace vs. finished ceiling. This is a huge cost driver. Ducts in a wide-open attic or a properly lit crawlspace are fast to access. Ducts buried under attic insulation, in a low-clearance soffit, or behind drywall add hours of careful work to any repair.
- Yardsticks from the South Bay climate. Santa Clara sits in one of the driest microclimates in the region, with summer attic temperatures that routinely climb above 130°F. That heat ages duct tape and mastic fast, and it’s why we routinely see failures on south- and west-facing attic runs that look fine on the north side of the same house.
- Type of sealant or repair method. A few tubes of UL 181-approved mastic and mesh costs very little in materials; a full Aeroseal-type project costs several times more but seals the entire network, including runs the technician can’t physically reach.
- Number of problem areas. One leak is a service call. Six leaks across three returns is a project. A thorough inspection tells you which one you have before you commit to the price.
- Whether cleaning is also needed. If ducts are heavily contaminated with dust, drywall dust from a recent remodel, or rodent debris, cleaning needs to happen before repair so the sealant doesn’t trap the debris in place. That’s a separate line item.
Honeywell and Aprilaire components come up frequently on homes in this area since both brands are common in Santa Clara installs, and a leaky duct system paired with a properly running quality air handling system is a frustrating combination – the equipment is doing its job while the ducts leak the investment away.
How to Save on Duct Repair & Sealing
There are real ways to keep the bill down without cutting corners. A few practical ones:
- Get a proper diagnostic first. The cheapest repair is the one done right the first time. A technician with a camera can pinpoint the actual leaks instead of guessing, which avoids the trap of paying twice for the same problem.
- Bundle repair with cleaning. If the ducts need cleaning anyway, doing both in one visit saves the second trip charge and lets the technician repair and seal in a single pass.
- Ask about the sealing method. Mastic and mesh on accessible joints is far less expensive than whole-house Aeroseal, and it’s perfectly effective when the leaks are accessible. That decision alone can swing the bill by more than $1,000.
- Fix it before it spreads. A disconnected flex run in a Santa Clara attic will pump conditioned air and moisture into the attic, and the insulation damage from that can be five figures. Catch it early.
- Get the free estimate. We quote the job based on what we actually find, not a coupon price. Call (855) 550-3778 and we’ll walk through it with you.
Almost everyone asks about rebates. There are utility and state programs that sometimes apply to duct sealing because it’s a measurable energy efficiency improvement, and we’re happy to tell you what we know about what’s currently available. We don’t overpromise on rebates – they change, and eligibility depends on your home – but we’ll point you in the right direction.
FAQs – Duct Repair & Sealing Cost
How much does duct sealing cost in Santa Clara?
Duct sealing typically costs $350 to $1,200 for targeted repairs, and $1,800 to $3,500 for whole-house sealing. The lower end covers accessible joints sealed with mastic and mesh; the upper end covers a full Aeroseal-type project that seals the entire duct network. Call (855) 550-3778 for an exact quote – estimates are free.
Is it cheaper to repair or replace my ducts?
Repair is almost always cheaper when the ducts themselves are structurally sound – $350 to $1,200 versus $1,500 to $4,500 for replacement, or more for a full system. Repair only loses out when the ductwork is crushed throughout, made of obsolete materials, or so deteriorated that patch fixes won’t hold. The inspection tells you which situation you’re in. Call (855) 550-3778 if you want a straight answer on your particular house.
Can you fix duct leaks the same day?
Many single-leak repairs can be addressed the same day – typically $175 to $350 if the duct is accessible. Larger work like whole-house sealing or replacing several flex runs is usually a scheduled job, often within a few business days. We’ll give you a clear timeline when we quote. Call (855) 550-3778 to check current availability.
Why are my Santa Clara utility bills so high?
A leaky duct system can add 20% to 30% to your HVAC bill, which on a typical Santa Clara home works out to hundreds of dollars a year. If your bills have crept up without an equipment change, leaky ducts are one of the first things to check. Call (855) 550-3778 to schedule a diagnostic.
Do I need duct cleaning before or after repair?
Cleaning comes first when there’s heavy contamination, drywall dust, or debris. Otherwise, sealing traps debris behind the seal and starts a new problem. Cleaning generally runs $300 to $600 in Santa Clara, and bundling the two in one visit saves a trip charge. Call (855) 550-3778 to book both together.
What Duct Repair and Sealing Actually Involves
It’s fair to know what you’re paying for. A duct repair and sealing visit has a specific sequence, and the quality of each step affects how long the fix lasts.
We start by mapping the system. That means walking the accessible duct runs, checking the air handler, plenum, and return connections, and running a camera inside the ductwork when needed. Commercial-grade gear here matters – a camera tells you where the leaks are rather than where you guess they are. Once the problem is mapped, the technician scores a severity ranking for each leak and shares the findings with you before any work starts. You approve the scope, and the price is confirmed before tools come out.
For mastic and mesh sealing, the technician removes old failed tape, cleans the mating surface, applies UL 181-rated mastic over a reinforcing mesh, and presses the joint flush. This is the repair method trusted for decades in commercial restoration work. Aeroseal goes further: a misted sealant is pumped through a sealed duct system, and particles accumulate at leaks until they close. Then we verify. A final pressure test or visual review confirms the seals hold before we pack up.
If duct cleaning is part of the visit, we bring the Rotobrush and Nikro systems we use on restoration jobs. Abatement Technologies equipment is on the truck for the jobs that need remediation-level capability. Insulation damaged during a leak repair gets re-wrapped with a code-rated material. The whole point is diagnosis-to-repair in a single visit rather than the “we’ll come back for the actual fix” pattern that homeowners get burned by elsewhere.
And to be clear about what this isn’t: it’s not a step-by-step procedure. If you suspect a disconnected run or torn flex line, the safest thing is a trained technician with the right tools. Duct systems involve potentially dangerous conditions most homeowners don’t account for – high voltage inside air handlers, hot surfaces, loose insulation that can cut skin, and confined attic spaces. We’d rather be the ones in the attic. For the full details on what we do, see the Duct Repair & Sealing in Santa Clara page or visit our home page.
What to Ask Before You Hire a Duct Repair Contractor in Santa Clara
Prices range widely for a reason – not every duct repair company offers the same level of service. A few things worth clarifying before you sign:
- Ask what equipment they’ll bring. A shop vac is a cleaning tool, not a diagnostic tool. Ask specifically whether the company uses commercial-grade systems on repair jobs – Rotobrush, Nikro, and Abatement Technologies systems are standard in professional restoration work and indicate the tier of equipment. If they can’t name their gear, that tells you something.
- Ask whether the quote includes the diagnostic. A firm estimate is based on what’s actually in the ductwork. If the quote is “starting at $199” without an inspection, that number is likely to change once they climb into the attic.
- Ask which sealing method they’ll use and why. Mastic and mesh for accessible joints. Aeroseal-type sealing for widespread leaks. A good contractor can explain when to choose which.
- Ask about the products. Guardsman-grade sealants and materials reflect a professional standard. Cheap tapes and generic sealants are the reason duct leaks come back a year later.
- Ask if they know Honeywell and Aprilaire equipment. If your home runs either brand (common in this area), the technician should understand your full air pathway, not just the ducts in isolation.
One more consideration specific to Santa Clara: homes near the Valley Fair and Santana Row corridors and older neighborhoods around the university frequently have ductwork that dates to the original construction, sometimes 40 or 50 years old. Inspections there routinely turn up problems that were there long before the current owner arrived. Knowing the age of your ductwork before you call saves time and makes the quote more accurate.
Final Word
Duct repair and sealing in Santa Clara usually lands between $350 and $1,200 for targeted work, with whole-house projects in the $1,800 to $3,500 range. The right fix depends on what’s actually leaking, how accessible it is, and whether you’re repairing one joint or the entire system. Because we bring commercial-grade equipment and diagnostic tools on every visit, we can give you a firm price before we touch a tool, and we can close the loop from inspection to repair in a single visit.
If your utility bills are climbing, your rooms are uneven, or a home inspection flagged your ductwork, the best next step is a free estimate. Call (855) 550-3778 and we’ll tell you exactly what it will cost.
Pricing reflects the Santa Clara market as of 2026. Heritage Duct Cleaning offers free estimates – call (855) 550-3778.
What Our Customers Say
"Told me straight that our ducts were in decent shape and didn't need doing every year like the mailer companies claim."
- Stephanie Sutton"They photographed every return and supply before starting and sent me the file afterward. No upsell to a sanitizing treatment I didn't need."
- Elena Flores"Did the dryer vent while they were here for a small add on price. The dryer now finishes a load in one cycle instead of two."
- Carlos Vargas