How Aeroseal HVAC Duct Sealing Works

The Aeroseal process works from inside the duct system rather than outside, which is what separates it from traditional mastic sealing. We don’t pull back insulation or try to access every duct section to track down each leak. Instead, we pressurize the system and release a water-based aerosol polymer. As air pushes through each leak point, the particles collect and bond there, building up until the gap is closed.

Once we’re done, our equipment measures your duct leakage rate again and generates the computerized report. You’ll see the exact percentage improvement. In our experience, that number does more for confidence in the work than any verbal guarantee we could give.

Most whole-home Aeroseal jobs wrap up in a single visit, with no drywall work and nothing to clean up when we leave.

Why Deltona Homes Are Especially Vulnerable to Duct Leakage

Deltona grew fast during the 1990s and early 2000s, and a lot of the homes built in that era share the same mechanical reality: flex duct systems installed under production-build timelines. A flex duct isn’t inherently inferior, but it’s sensitive to installation quality and it doesn’t get more forgiving with age. Over time, joints separate and the material degrades, and in Central Florida’s attic environment, where temperatures can exceed 130°F in summer, that happens faster than it would almost anywhere else in the country.

We’ve worked in enough Deltona homes to recognize the pattern: the system runs, the thermostat reads the right temperature, but two bedrooms at the far end of the house never quite cool off. That’s usually a duct problem, not an equipment problem. Replacing the HVAC unit won’t fix a leaking duct system — it’ll just put a new machine to work losing air through the same gaps.

Leaking ducts also pull in unconditioned attic air and push it through your home, which hits indoor air quality as hard as it hits your energy bill. In a Florida attic in July, that’s not air you want mixing with what your family breathes.

What Sets Our HVAC Air Duct Sealing Company Apart in Deltona

We don’t think of ourselves as a contractor that visits and leaves. In our experience, the homeowners we serve in Deltona and across Volusia County want to understand what we found, what we did, and what changed. The Aeroseal computerized report makes that possible. It’s a diagnostic record that belongs to you, not something we wave around at the door and take with us when we go.

Our team is licensed through Florida DBPR, and our license is verifiable at MyFloridaLicense.com. We carry that accountability into every job, because homeowners who invest in aeroseal hvac duct sealing services in Deltona deserve a company they can actually check up on.

If you want a second opinion before committing, we welcome it. Honest advice from neighbors who happen to do this work for a living is still the most useful kind we know how to give.

“In my years working on HVAC systems throughout Deltona, the homes that struggle most with cooling aren’t the ones with aging equipment — they’re the ones where a quarter or more of the conditioned air never makes it past the attic because the ducts haven’t been sealed. Aeroseal closes those gaps and gives homeowners a report that shows them exactly what changed.”

7 Resources Every Deltona Homeowner Should Read Before Scheduling Air Duct Sealing

These resources cover the full decision — from understanding the problem and the technology to choosing the right contractor, verifying their license, and finding rebates that can offset what you spend.

1. Understand Why Your Ducts Are Probably Costing You More Than You Realize

Source: U.S. Department of Energy — energy.gov/energysaver/minimizing-energy-losses-ducts

The DOE explains how duct leakage adds hundreds of dollars a year to heating and cooling bills and why professional sealing is almost always more cost-effective than replacing equipment. Read this first so you understand the actual problem before you evaluate any solution.

2. See the Efficiency Numbers: What Sealed Ducts Actually Give You Back

Source: ENERGY STAR (U.S. EPA & DOE) — energystar.gov/saveathome/heating-cooling/duct-sealing/benefits

ENERGY STAR documents that leaky ducts can reduce system efficiency by as much as 20 percent, and that sealing them often pays for itself in energy savings. For Deltona homeowners running air conditioning most of the year, this page puts a real number on the return before you commit to the service.

3. The Contractor Checklist: What a Qualified Duct Pro Should Do on Every Job

Source: ENERGY STAR (U.S. EPA & DOE) — energystar.gov/saveathome/heating-cooling/duct-sealing/professional-duct-contractor

ENERGY STAR outlines exactly what a qualified duct contractor should inspect, seal, insulate, and verify on every service call — including full system inspection, supply and return air balance evaluation, and post-repair airflow testing. Use this as a benchmark before you book anyone; if a contractor's scope doesn't match this list, that's worth knowing upfront.

4. Know the Difference Between Duct Sealing and Duct Cleaning Before You Call

Source: U.S. Environmental Protection Agency — epa.gov/indoor-air-quality-iaq/should-you-have-air-ducts-your-home-cleaned

The EPA's consumer guide covers what any duct service provider should and shouldn't do, how to collect estimates, and what to ask before work begins. It's also the clearest explanation of how duct sealing and duct cleaning differ — two services that frequently get conflated when homeowners start researching.

5. Run This 60-Second License Check Before Any HVAC Contractor Enters Your Home

Source: Florida DBPR — myfloridalicense.com

Florida law requires HVAC contractors to hold an active state license, and MyFloridaLicense.com lets you verify any company by name or license number in under a minute. This step costs nothing and confirms you're working with a legally operating contractor before the job starts.

6. Deltona Homeowners May Qualify for Up to $3,800 in Duct and HVAC Rebates

Source: Duke Energy Florida — duke-energy.com/home/products/home-energy-improvement

Duke Energy Florida's Home Energy Improvement program covers duct testing and repair, HVAC replacement, attic insulation, and energy-efficient windows for eligible residential customers in the Deltona service area. Completing a free Home Energy Check is the required first step to unlock any rebate — which is what the next resource covers.

7. Start Here: The Free Assessment That Qualifies You for Duct Repair Rebates

Source: Duke Energy Florida — duke-energy.com/home/products/home-energy-check

Duke Energy's free Home Energy Check — available by phone or online in under 30 minutes — is the required prerequisite for accessing any rebate in their Home Energy Improvement program, including duct test and repair coverage. Complete it before you schedule duct sealing and you may offset a meaningful portion of the total cost.

The Numbers Behind Duct Leakage in Florida Homes

Federal research backs what we see in Deltona homes every week. Three statistics every homeowner should know before scheduling any HVAC service.

1. Leaky ducts cut your system's efficiency by as much as 20 percent.

Efficiency lost to duct leakage — even in systems that are otherwise functioning normally.

• Your HVAC runs. Conditioned air escapes through gaps before it reaches you.

• Your system compensates by running longer — and your bill reflects it.

• In Deltona's year-round cooling climate, that 20 percent loss compounds with every cycle.

• Aeroseal seals those gaps from inside the duct system and documents the improvement.

Source: ENERGY STAR — Benefits of Duct Sealing — energystar.gov/saveathome/heating-cooling/duct-sealing/benefits

2. Duct leaks can add hundreds of dollars a year to your cooling bill.

Annual cost added to heating and cooling bills when ducts leak into unconditioned spaces.

• In Deltona, "unconditioned space" usually means the attic.

• Attic temperatures regularly exceed 130°F in Central Florida summers.

• Air leaking into that environment absorbs heat before reaching your living areas.

• Most homes built before 2005 in Volusia County carry this risk with their original flex duct systems.

Source: U.S. Department of Energy — Minimizing Energy Losses in Ducts — energy.gov/energysaver/minimizing-energy-losses-ducts

3. Americans spend 90 percent of their time indoors — air quality follows duct performance.

Of time Americans spend indoors, making what's circulating through your ducts a daily health variable.

• Leaking ducts don't just lose air. They pull in whatever surrounds them.

• In Florida attics: dust, humidity, insulation particles, and mold-friendly moisture.

• That air then circulates through every room your system serves.

• For families spending most of the day indoors with the AC running, the air quality case is as strong as the efficiency case.

Source: U.S. Environmental Protection Agency — Indoor Air Quality (IAQ) — epa.gov/indoor-air-quality-iaq

Final Thoughts

The diagnostics keep showing the same thing in homes with original flex duct systems from the 1990s and early 2000s, which is most of what we work on in Deltona. Duct leakage is common here. And it’s fixable, usually in a single visit.

Aeroseal gives you a computerized report that documents the measured leakage rate before we started and after we finished. That’s the kind of transparency we’d want if we were the homeowner writing the check, and it’s the standard we hold ourselves to on every job.

If your HVAC runs harder than it should, or you’ve got rooms that won’t cool down no matter where the thermostat’s set, that’s worth a conversation. We’re your neighbors out here, and we think you deserve to know what your ducts are actually doing.

Frequently Asked Questions

What is Aeroseal HVAC air duct sealing?

Aeroseal is a patented duct sealing process that works from inside the system, with no wall access or ceiling work required. We pressurize the ducts, release a non-toxic aerosol polymer, and as air tries to push through each leak point, the particles collect and bond there. The process ends with a computerized report showing your measured leakage rates before and after. Most homeowners are surprised by how contained the whole thing is compared to what they expected.

How long does the Aeroseal process take?

For most single-family homes in Deltona, the Aeroseal process runs four to eight hours from setup through completion. That covers the pre-service leakage measurement, the sealing application, and the final test that produces your computerized report. You’ll want to be home for the visit, but there’s no construction noise or drywall dust. It’s one of the cleaner jobs we do.

How do I know if my ducts are leaking?

The most consistent signs in Deltona homes: rooms that don’t respond well to the thermostat, especially bedrooms at the far end of the house; energy bills that seem high relative to the home’s size; dust that builds up quickly near vents; and an HVAC system that runs almost continuously during summer. In homes from the early 1990s through mid-2000s with original flex duct systems, we typically find at least two or three of those symptoms together. A leakage test puts a measured number on it.

Is Aeroseal duct sealing worth it for Deltona homes?

For homes with meaningful duct leakage, the answer is usually yes, and the ENERGY STAR data on why is straightforward: leaky ducts can cut heating and cooling efficiency by as much as 20 percent. That’s a real cost, amplified by Deltona’s year-round cooling demands. Aeroseal addresses the root cause rather than working around it. We’ve seen homeowners replace perfectly functional HVAC equipment and still have the same comfort problems, because the duct issue underneath was never fixed.

Will Aeroseal work on older flex duct systems common in Deltona?

Yes, and it’s actually where we tend to see the sharpest improvement numbers. Older flex duct systems develop leakage at end connections, joints, and sections stressed by years of heat cycling inside a Florida attic. Aeroseal seals those leaks from the inside regardless of where they sit along the duct run, which makes it more effective on aging systems than surface-applied sealants that can only reach exterior access points. If your ducts date from the 1990s or early 2000s, they’re worth having evaluated.

Improve Your Home's Efficiency With One Call to Our Deltona Team

We'll measure your duct leakage, seal what's losing you money, and hand you a computerized report showing exactly how much improved — all in a single visit. Schedule your free estimate and let's find out what your ducts are actually costing you.