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
Before
After
Before
After
Before
AfterHow Much Does Duct Repair & Sealing Cost in Tarzana?
Duct repair and sealing in Tarzana typically runs $450 to $1,850 for most homes, with the average project landing around $850. A single reconnected run or a small patch-and-seal job can be done for a few hundred dollars, while a full attic system with multiple leaks, sagging flex runs, and a failing plenum can push past $2,500. The number that matters is how many leaks we find and how hard they are to reach, and a free estimate tells you that in under an hour.
We’re a duct and vent specialist, not a general HVAC shop that treats this as a sideline. But the thing most people don’t realize: cleaning and sealing in the same visit usually costs less than doing them separately. We run Rotobrush and Nikro professional systems, contain the work with Abatement Technologies negative-air equipment, then seal what needs sealing. We clean it. If it’s broken, we fix it.
Key Takeaways
- Most Tarzana duct repair and sealing jobs land between $450 and $1,850, with a typical project near $850.
- Leaks, disconnected sections, and damaged liners are repair problems. Cleaning alone can’t fix them.
- Bundling cleaning and sealing in one visit is usually cheaper than two separate appointments.
- An attic system in a 1950s ranch near Reseda Boulevard costs more to access than a newer build off Ventura Boulevard.
- Estimates are free. Call (866) 472-7239 and we’ll scope the system before quoting a dollar figure.
Duct Repair & Sealing Cost Breakdown (2026)
Here’s how the pricing breaks out line by line. These ranges reflect what we see across Tarzana homes, from mid-century ranches in the hills to newer construction near the 101.
| Service or Fix | Typical Cost Range | What’s Involved |
|---|---|---|
| Leak inspection & pressure test | $150 – $350 | Full walk of the system, airflow and static pressure check, leak mapping |
| Low-cost sealing (foil tape + mastic on accessible joints) | $250 – $550 | Sealing joints and boots you can reach without cutting into walls |
| Full duct sealing (mastic + mesh on attic/crawl runs) | $650 – $1,400 | Systematic seal of joints, boots, plenum, and penetrations |
| Reconnect a disconnected duct run | $200 – $450 per run | Re-securing separated flex or hard pipe, taping and mastic sealing |
| Replace damaged flex duct section | $300 – $700 per section | Cutting out crushed or torn flex and fitting a new run |
| Repair damaged liner inside hard duct | $400 – $900 | Repairing or relining the interior liner so debris stops shedding |
| Seal/repair plenum at the air handler | $350 – $800 | Closing the biggest leak in most systems, right above the unit |
| Duct cleaning + sealing bundle | $850 – $1,800 | Rotobrush/Nikro cleaning followed by full sealing in one visit |
Prices climb when access is tight, when the problem spans more than one run, or when the system sits in a low attic that requires extra care with containment. They drop when the repair is confined to the plenum and the first accessible length of duct, which is often the case in homes where the air handler is in a hall closet. If you’re comparing this page against a one-line quote from a generalist, ask whether their number includes the pressure test and whether it includes sealing the plenum. Those two items add the most real value and are the easiest to leave out.
One more distinction worth stating plainly: sealing is not the same as repairing. Sealing closes gaps. Repair fixes structure. A crushed flex run in a hillside home near Vanalden Avenue won’t seal well because the duct itself is damaged, and tape over a crushed run fails fast. That’s why we scope both. To see the full range of what we handle, look at Duct Repair & Sealing in Tarzana, or start at our home page for the broader picture.
What Affects Duct Repair & Sealing Pricing in Tarzana
Five things move the number up or down. We walk every system before quoting because two houses on the same street can price very differently.
- Attic access and how tight the space is. A good chunk of Tarzana’s housing stock dates to the late 1940s through the 1960s, and many of those attics are low, hot, and crossed with older framing. Working in a shallow attic with Abatement Technologies containment takes more time than a tall, open space, and that shows up in labor.
- Flex duct versus rigid metal. Long runs of flexible duct that sag or kink are common in additions and remodels around Tarzana. Flex is faster to seal at the joints but easier to crush, and crushed runs need replacement, not tape.
- How many leaks the pressure test finds. Return-side leaks near the air handler often leak more than supply joints, because the negative pressure pulls in attic air. If the return plenum is open, that’s a big leak and a bigger repair.
- Whether you bundle cleaning with sealing. Doing both in one visit saves the second trip and the second setup. We run Rotobrush and Nikro cleaning systems with containment, then seal the same day. One visit, one mobilization.
- Number of system zones. Two-story homes and homes with two air handlers double the work. A zoned house in the hills above Ventura Boulevard might have two separate attic systems, each scoped on its own.
- Containment and debris control. We use Abatement Technologies negative-air and containment equipment so loosened debris doesn’t drift back into living space. That setup takes time, and it’s the step most low-cost crews skip. It’s also the reason the work area stays clean.
How to Save on Duct Repair & Sealing
You don’t need to chase the lowest quote to save money. You need to avoid paying twice for the same problem. A few practical ways to keep the bill down:
- Bundle cleaning and sealing into one visit. One trip, one containment setup, one mobilization. The combined price is lower than two separate appointments, and the seal job lasts longer because the ducts are clean first.
- Fix leaks before they turn into replacements. A disconnected joint that runs for a season can crush or tear the flex behind it. Sealing early costs a fraction of replacing the whole run.
- Ask for the pressure-test result in writing. A before-and-after reading shows exactly what the seal job changed. If a quote skips the test, the price may look lower, but you won’t know if the leaks actually closed.
- Address the plenum first. On most systems, the largest single leak is the connection right above the air handler. Sealing that one spot often recovers more airflow than sealing several small joints elsewhere.
- Get a free, itemized estimate. We quote per line item so you can see what’s essential and what can wait. Call (866) 472-7239 and we’ll scope the system before you decide anything.
Estimates are free, and we’re happy to compare the cost of repair against the cost of a whole-system reseal in plain dollars. If you’ve already had a cleaning-only quote from another company and want to know whether sealing is worth adding, tell us what they found and we’ll tell you honestly.
FAQs – Duct Repair & Sealing Cost
How much does duct repair and sealing cost in Tarzana?
Most jobs here cost between $450 and $1,850, with the typical project near $850. A single reconnected run is often a few hundred dollars; a full attic reseal with multiple repairs runs toward the top of the range. Call (866) 472-7239 for a free, itemized estimate.
Is it cheaper to repair or replace ducts?
Repair is almost always cheaper. Sealing leaks and replacing a few damaged sections typically costs $450 to $1,850, versus several thousand dollars for a full system replacement. Replacement only wins when most of the ductwork is crushed, torn, or lined with damaged material throughout. A pressure test tells you which situation you’re in.
How much does duct sealing alone cost?
Sealing on its own runs $250 to $1,400, depending on how much of the system is accessible and how many joints need closing. A small, accessible job sits near the bottom; a full attic with mastic and mesh on every joint and penetration sits near the top. Call (866) 472-7239 for an exact number.
Do I really need duct cleaning before sealing?
Yes, and doing them together costs less than doing them separately. Sealing over dirty joints traps debris against the mastic, and loosened material can recirculate. We run Rotobrush and Nikro cleaning with Abatement Technologies containment first, then seal the cleaned system the same day.
Why does my Tarzana home lose so much cooled air?
Leaky return and supply ducts are the usual cause, and older hillside homes with long runs through a hot attic lose the most. Sealing the plenum and accessible joints often recovers a meaningful share of that loss. A pressure test measures how much before and after, so you see the difference in actual numbers, not just a promise.
What Else to Know Before You Book
A few local realities shape how we scope a Tarzana job:
- Hillside access. Homes off Vanalden and in the canyons have slopes, stairs, and sometimes limited access to the attic. We plan access and containment up front so the estimate reflects real conditions, not a best-case guess.
- Older building stock. Many mid-century homes have duct systems that were retrofitted into attics later. Those runs are often shorter, tighter, and more prone to disconnection at the boot.
- Dryer vent as a separate, dedicated service. Lint buildup is a fire-safety issue, and we treat dryer vent cleaning as its own specialty using the same equipment-first approach we apply to HVAC ducts. It’s not a quick upsell bolted onto an HVAC call, and pricing depends on run length and how many elbows the vent has to clear.
- Related IAQ work beyond the ducts. When a repair recommendation touches filters, purifiers, or humidifiers, we’re fluent across Honeywell, Aprilaire, and Guardsman product lines. That means we can advise on the whole air-quality picture without pretending it’s an HVAC install job.
Check out our related work across the area if it helps you plan. We handle duct and vent services across the San Fernando Valley, including air duct cleaning in Northridge, air duct cleaning in Woodland Hills, air duct cleaning in Encino, air duct cleaning in Tarzana, dryer vent cleaning in Tarzana, air duct repair in Northridge, dryer vent cleaning in Woodland Hills, air duct cleaning in Sherman Oaks, and dryer vent cleaning in Encino. If you have questions about how a cleaning-and-sealing visit works, our air duct cleaning cost guide explains the cleaning side in the same detail.
We specialize in duct repair, sealing, cleaning, and dryer vent work, and that’s the entire business. Not a generalist treating air-quality work as an afterthought. If you want a straight, itemized number for your Tarzana home, call (866) 472-7239. Estimates are free, we’ll walk the system with you, and you’ll know exactly what you’re paying for before anyone touches a duct.
Pricing reflects the Tarzana market as of 2026. Air Duct Cleaning Tarzana offers free estimates – call (866) 472-7239.
Written by the team at Air Duct Cleaning Tarzana, serving Tarzana and the San Fernando Valley with dedicated duct repair, sealing, cleaning, and dryer vent services.
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."
- Marisol Mendoza"They photographed every return and supply before starting and sent me the file afterward. No upsell to a sanitizing treatment I didn't need."
- Marco Herrera"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."
- Paul Doyle