Duct Repair & Sealing Cost - We Measure the Leak Before We Quote

Every visit starts with

Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents

Worth knowing

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.

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Before & after – our own jobs

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How Much Does Duct Repair & Sealing Cost in Chandler?

Our Duct Repair & Sealing services in Chandler, AZ typically cost between $350 and $1,200 for a standard single-story home, with most jobs landing in the $450-$750 range. Two-story homes with longer duct runs, older flex-duct systems, or significant blowout damage at the plenum can push totals toward $1,500-$2,800. At CleanRun, every price is written down before any work starts – no exceptions, no “call for a quote.”

Duct Repair & Sealing Cost Breakdown (2026)

The table below reflects what CleanRun quotes in the Chandler market as of 2026. These are real ranges based on what we actually find in local homes – not national averages padded with qualifiers.

What’s inside these numbers

Every CleanRun quote includes the inspection camera work, the written scope of repairs, the labor, and the materials – mastic, foil tape, flex-duct sections, couplings, or sealant, depending on what the camera actually shows. There is no separate “diagnostic fee” added after the fact. The written price is the price.

The biggest cost variable in Chandler is attic access and temperature. Chandler’s summer attic temperatures routinely exceed 150°F, which accelerates flex-duct degradation. We find detached connections, split vapor barriers, and collapsed inner liners in homes as young as 12 years old – particularly in the Fulton Ranch, Ocotillo, and Seville neighborhoods where tract construction used lighter-gauge flex. Jobs in those homes often require more section replacements than a comparable square-footage home in a cooler climate would. That’s a Chandler-specific cost driver that national pricing guides don’t account for.

What Affects Duct Repair & Sealing Pricing in Chandler

• Attic vs. crawl-space vs. slab layout: Most Chandler homes are slab-on-grade with ductwork routed through the attic. Attic access in a Chandler summer means heat exposure and working in confined space – both of which affect the time required. A 2,200-square-foot home with a single pull-down attic access takes longer to stage safely than the same home with two dedicated attic hatches. Time is reflected in the written quote, not added as a surprise at the end.
• Flex-duct vs. sheet-metal construction: Flex-duct is cheaper to install and widely used across Chandler’s post-1990 construction. It degrades faster in extreme heat and is more prone to kinking, tearing, and connection failure. Sheet-metal duct is more durable but harder to patch cleanly – repairs require fitting custom couplings and re-sealing with mastic. The material type changes both the labor method and the materials cost.
• Number of leakage points found: Duct leakage is measured as a percentage of total system airflow. A system leaking 15% of conditioned air at the supply side is a fundamentally different repair scope than a system leaking 30%+. Camera inspection – which CleanRun performs on every job – identifies each leakage point before the quote is written. You’ll see the photos before deciding anything.
• Plenum condition: The supply plenum (the sheet-metal box connecting the air handler to the duct branches) is a high-priority repair location. Cracks, loose connections, or missing sealant at the plenum affect every room the system serves. Plenum repairs are priced separately in the quote because the scope varies significantly – from a simple resealing job to partial fabrication and reattachment.
• System age and prior repair history: Homes in older Chandler neighborhoods like Dobson Ranch or portions of the Hamilton area frequently have ductwork that was repaired once or twice with household foil tape – which is not rated for HVAC use and fails within a few years. Re-doing a prior patch job correctly costs more than doing it right the first time, because the failed material has to be removed before proper mastic or mechanical coupling can be applied.
• Whether sealing alone is sufficient or replacement is needed: Sealing is appropriate when the duct structure is sound but leaking at joints and connections. When the inner liner of flex-duct has collapsed, when a sheet-metal run has a physical breach, or when the duct system has been modified incorrectly by a prior contractor, section replacement is the correct repair. CleanRun’s written quote will tell you which applies to your system – and why – before any work starts.

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Chandler-Specific Cost Factors Worth Knowing

Chandler operates under Maricopa County mechanical code, which follows the International Mechanical Code (IMC) with Arizona amendments. Duct repair work that involves modifying, replacing, or extending ductwork connected to the air-handling system may require a permit depending on scope. CleanRun handles the permit question upfront – if your repair scope requires one, that’s stated in the written quote, not discovered when the job is already open.

In neighborhoods like Pecos Ranch and portions of south Chandler near the Price Corridor, we see a higher rate of attic bypass leakage – conditioned air escaping around recessed light penetrations and dropped-ceiling chases before it ever reaches the register. That’s technically an air-sealing issue rather than a duct-sealing issue, and it affects how much benefit you’ll get from duct repairs alone. When our camera inspection picks this up, we flag it in the written scope so you know what you’re paying for and what you’re not.

The Gilbert Road corridor and older Chandler Heights-area homes built in the late 1970s and 1980s sometimes still have galvanized steel ductwork with insulation wrapped on the exterior. Interior mastic sealing on these systems requires different prep than on wrapped flex-duct, which affects labor time. If your home was built before 1988, mention it when you call – it helps us bring the right materials on the first visit.

How to Save on Duct Repair & Sealing

Get an inspection before assuming you need full replacement

A lot of Chandler homeowners call us after getting a quote from an HVAC contractor that includes full duct replacement at $4,000-$8,000. Sometimes that’s the right call. Often it isn’t. A camera inspection of the actual duct runs – not just a visual at the register – frequently shows that 70% of the system is sound and only specific sections or connection points need repair. The repair scope is documented before the quote is written. You’ll know what needs to happen and what doesn’t before spending anything.

Use CleanRun’s free second opinion

If you have a written estimate from another company, bring it. CleanRun will put our own number next to it in writing, with a line-by-line breakdown. That’s not a sales tactic – it’s how we demonstrate that our pricing reflects actual scope, not markup on ambiguity. Call (520) 464-6297 and mention you have an existing estimate; we’ll schedule the comparison at no cost.

Combine repair with cleaning in the same visit

If your duct system needs both cleaning and sealing, scheduling them together saves on mobilization cost. The camera work and access setup are shared across both scopes, which reduces the total quote compared to two separate visits. Our Duct Repair & Sealing in Chandler page outlines how we handle combined-scope jobs, including how the photo documentation works when both services are performed together.

Don’t let small leaks become large ones

A 3/8-inch separation at a duct-to-boot connection – the kind of gap that shows clearly on a camera but is invisible from the register – typically costs $40-$90 to seal correctly. If the attic heat and normal pressure cycling work on that connection for another two seasons, the flex section may separate entirely, costing $85-$175 to replace. The repair cost curve is not linear; small leaks caught early are significantly cheaper than the same damage caught late.

Ask about what the quote actually covers

The $79 duct cleaning coupon that most Chandler homeowners have seen circulating online typically does not include any inspection camera work, any sealing, or any repair. The $79 gets a truck in the driveway; the actual work is quoted after arrival, often at multiples of the advertised price. A written quote before arrival – Haven Standard Clause 1 – removes that risk entirely. You know the full number before any panel comes off.

Duct Repair vs. Duct Sealing: What’s the Difference in Cost?

These two terms are often used interchangeably but they describe different scopes of work, and the distinction affects pricing directly.

Duct repair addresses physical damage: a disconnected flex section, a cracked plenum wall, a collapsed inner liner, or a boot that has pulled away from the drywall. The work involves cutting out and replacing material, fabricating new connections, or mechanically re-attaching separated sections. Labor is higher because the repair requires physical access to the damaged point – often in an attic, behind a wall, or under a return-air cabinet.

Duct sealing addresses leakage at joints and connections where the structure is intact but conditioned air is escaping. The most common method is mastic sealant – a water-based, brush-applied compound that dries flexible and airtight. For systems with widespread small leaks, Aeroseal is an alternative: a pressurized polymer mist is introduced into the pressurized duct system and adheres to leakage points from the inside. Aeroseal costs more upfront ($900-$1,800 in Chandler) but can seal dozens of small leaks simultaneously that would take hours to address individually with mastic.

Most Chandler homes need some of both – a few physical repairs at specific points, and mastic sealing at joints throughout. The camera inspection separates the two before the quote is written.

What the CleanRun Photo Documentation Actually Shows You

This is worth explaining specifically because it changes what you’re paying for.

Before any repair starts, a CleanRun technician runs a camera through every duct run – supply and return – and photographs each joint, connection, elbow, and boot. The photos show the inside surface of the ductwork: debris accumulation, separation at joints, liner condition, mastic coverage (or absence of it), and any visible mechanical damage. You see the before photo. After the repair and sealing is complete, the same camera runs the same path, and the after photos are taken at the same points.

Both sets of photos are delivered to you as part of the standard job record – not as an optional add-on, and not as a PDF that disappears into an email. This practice has been part of every CleanRun job since 2013, because the documentation is the proof. “Your ducts are better now” means nothing. A side-by-side photo of an open joint sealed with correctly applied mastic means something you can hold onto.

The 365-Day Done Right Promise is backed by this documentation. If a repair doesn’t hold or a sealed joint re-opens within 365 days, the photo record shows the condition at the time of the job – and CleanRun makes it right. That promise is in writing on every job, under the H.A.V.E.N. Standard.

Signs Your Chandler Home Needs Duct Repair or Sealing

• Rooms that don’t cool evenly in summer: If the bedroom at the end of the hall is consistently 4-6°F warmer than the thermostat setting while the living room hits temperature easily, leakage in the supply run serving that room is a likely cause. Chandler summers make this symptom hard to ignore.
• Utility bills that climbed without explanation: APS and SRP customers in Chandler frequently see bill increases in the $40-$120/month range attributed to duct leakage. When conditioned air escapes into a 150°F attic before reaching the living space, the system runs longer to compensate. Sealing the leaks reduces the run time.
• Dust around registers shortly after cleaning: If you’re wiping dust from register covers within a few days of cleaning, air is likely bypassing the filter through a return-side leak and pulling attic particulates directly into the duct stream.
• A musty or stale smell from vents: Attic air in Chandler carries dust, fiberglass particles, and occasionally rodent debris. A return-side duct leak draws this air into the system and distributes it through the living space. Camera inspection will show the source.
• An HVAC system that short-cycles or runs constantly: Extreme duct leakage can cause the system to lose enough supply pressure that it can’t satisfy the thermostat setpoint, leading to extended run cycles or short-cycling at the air handler. This wears mechanical components faster and shows up on the utility bill.

FAQs – Duct Repair & Sealing Cost in Chandler

How much does duct sealing cost in Chandler, AZ?

Duct sealing in Chandler typically costs $350-$900 for mastic application on a standard home, depending on the number of runs and leakage points found. Aeroseal whole-house sealing runs $900-$1,800. The specific number for your home depends on what the camera inspection finds – and CleanRun puts that number in writing before starting. Call (520) 464-6297 for a written estimate; there’s no charge for the quote.

Is duct sealing worth it in a Chandler home?

For most Chandler homes, yes – the payback period on duct sealing is typically 2-4 years in energy savings alone, based on what APS and SRP data shows for systems losing 15-25% of conditioned air to attic leakage. In a climate where the air conditioner may run 10-14 hours a day in July, reducing that run time by even 12-18% produces measurable bill reductions. The repair cost ($350-$900 for most homes) is recovered well within the equipment’s remaining service life.

How long does duct repair take in a Chandler home?

A focused duct sealing job on a 1,800-2,200 square-foot Chandler home typically takes 3-5 hours from setup to final camera documentation. Homes requiring section replacement or plenum repair may take 5-8 hours depending on attic access and how many repair points are involved. We schedule jobs with enough time to do the camera work before and after – not just the repair in between.

Can I seal my ducts myself to save money?

Accessible joints at visible register boots can be resealed with foil-backed HVAC tape or mastic – but standard household duct tape is not rated for HVAC use and will fail within one to two seasons in Chandler’s attic temperatures. The deeper problem is that most duct leakage occurs at interior joints inside the attic runs, which aren’t accessible without camera equipment. DIY sealing at registers while leaks persist at mid-run joints produces partial results at real cost. If you want to tackle the accessible points yourself, use UL 181-rated foil tape or mastic from a HVAC supply house – not hardware-store duct tape.

What’s the difference between duct cleaning and duct sealing – do I need both?

Duct cleaning removes debris from the interior surfaces of the ductwork using negative-pressure extraction equipment. Duct sealing closes leaks at joints and connections to prevent conditioned air from escaping into unconditioned space. They address different problems. Some homes need cleaning more urgently; some need sealing. Some need both. The camera inspection tells you which applies to your system. If you need both, combining them in one visit reduces the total cost compared to two separate jobs. CleanRun’s free estimate will show you both scopes and the combined price, in writing, before work starts – call (520) 464-6297.

Does duct repair require a permit in Chandler?

Most duct sealing and minor repair work in Chandler does not require a permit. Duct work that involves extending, modifying, or replacing a significant portion of the duct system connected to the air handler may fall under Maricopa County mechanical permit requirements. CleanRun determines permit applicability based on scope during the inspection phase and states it in the written quote – not as a surprise after work has started.

Key Takeaways

• Duct repair and sealing in Chandler costs $350-$2,800 depending on home size, duct material, and the number of leakage points found.
• Most single-story Chandler homes (1,600-2,400 sq ft) fall in the $450-$900 range for mastic sealing and targeted repairs.
• Chandler’s attic temperatures accelerate flex-duct degradation – homes built between 1985 and 2005 in Ocotillo, Fulton Ranch, and Dobson Ranch often need more section replacements than their square footage alone would suggest.
• Every CleanRun quote is written before work starts and includes camera inspection documentation – before and after photos of every duct run, delivered as a standard job record.
• The 365-Day Done Right Promise is in writing on every job. If a repair doesn’t hold, CleanRun makes it right.
• Free second opinion on any written estimate from a competitor – call (520) 464-6297.

Get a Written Duct Repair Estimate for Your Chandler Home

If your home is losing conditioned air to attic leakage, running warm rooms in summer, or showing any of the signs described above, the starting point is a camera inspection and a written price – not a ballpark, not a range, a specific number for your specific system before anyone picks up a tool. That’s how CleanRun has operated across all 52,000+ homes served since 2013, and it’s what Haven Standard Clause 1 requires on every job.

CleanRun serves Chandler and the surrounding area, and all calls are answered by a live person. You can learn more about what a full repair scope looks like on our Duct Repair & Sealing in Chandler page, or return to our home page for the full list of services we offer.

To schedule a written estimate or get a free second opinion on an existing quote, call (520) 464-6297. Tomas Reyes and the CleanRun team are ready to put the price in writing before any work begins.

Pricing reflects the Chandler market as of 2026. CleanRun Air Duct Cleaning Chandler offers free estimates – call (520) 464-6297.

Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Chandler, serving Chandler, AZ since 2013.