AIR DUCT REPLACEMENT IN SAN ANTONIO, TX

Most air duct systems last 15–25 years. After that, the same flex ducts that were quietly doing their job begin to develop cracks, tears from critters, collapse in sections, come disconnected at joints, or
accumulate mold contamination so deep in the lining material that no amount of cleaning resolves it. At that point, you're not dealing with a dirty system, you're dealing with a failing one, and replacement is the right answer.
At NextGen, we replace air duct systems throughout San Antonio and Austin. We're also the company that will honestly tell you when you don't need replacement, when cleaning is sufficient, we say so and perform the cleaning. We don't recommend the higher cost service unless it's genuinely warranted. 


Why San Antonio Homes Are Seeing More Duct Replacement

San Antonio's dramatic building boom of the 1990s and 2000s produced a huge stock of homes now reaching the age where original air ducts is beginning to fail. Flex ducts, the flexible, corrugated duct used in the vast majority of San Antonio residential systems has a practical lifespan of 15–25 years under normal conditions. Many of those homes built in 1995–2005 are now 20–30 years old and showing the signs of duct aging: sagging sections,
cracked outer jackets, tears, disconnected joints where flex has pulled away from registers, and inner liners that are beginning to deteriorate or are full of mold.
San Antonio's attic heat also accelerates aging. Flex duct outer shells that repeatedly expand and contract between 180°F summer attic temperatures and 30°F winter nights experience material fatigue faster than ducts in more moderate climates. Proper attic insulation and attic fan slows this aging significantly. It's one of the reasons we recommend insulation assessment alongside any duct replacement project.


Signs You Need Air Duct Replacement (Not Just Cleaning)

Visible damage to flex duct - agging, wear & tear, collapse, or disconnection.
Flex duct that has partially collapsed or separated from registers at junction points cannot be effectively cleaned. Airflow has already been compromised, and the physical damage prevents the duct from performing its function regardless of how clean it is.

Mold contamination in air ducts.
When mold starts growing and spearding inside of the air ducts, it can be treated but sometimes the growth is to far to clean. The EPA's guidance on duct mold indicates that duct replacement is the appropriate response when mold growth extends beyond accessible surfaces. 
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Air ducts older than 20 years.
If you've purchased an older San Antonio or Austin home and have no documentation of duct cleaning or maintenance, a full assessment is needed. We will tell you what condition the ducts are in and give you an
honest recommendation. Sometimes cleaning is sufficient, sometimes partial replacement
addresses the problem areas, and sometimes full replacement is the wisest investment.
 
Chronic performance problems.
rooms that don't cool properly, high energy bills, excessive dust despite the fact that the HVAC unit runs with no issues. If your HVAC equipment is in good condition but the system still doesn't perform well, the ductwork is often the culprit. Leaky duct joints lose 20–30% of conditioned air before it reaches its destination. That is air you
paid to cool that is dumped into your attic instead of your living room.


Our Duct Replacement Process

Full duct system assessment first.
We inspect your existing ductwork from the air handler through to each register. We identify which sections are failing, which are ok, and whether partial or full replacement is appropriate. We photograph everything so you can
see what we are working with.

Written scope and firm price.
We provide a detailed description of the replacement work. Which ducts, what materials, what timeline and a firm price. 

Removal of old ductwork.
We remove failing ducts and dispose of them. 

New duct installation.
We install new flex duct for residential homes and light commercial buildings and offices,  or sheet metal systems for large commercial buildings. Using proper support hangers, insulated sections, and sealed connections at every junction. All duct connections are sealed.

Post installation testing.
We verify airflow at every register after installation. We check that each zone of your home/office/building receives proper airflow and that there are no disconnected or
leaking connections in the new system.


Related Services That Work With Duct Replacement

Duct replacement is the ideal time to also address attic insulation and attic fan. Since our crew is already accessing the attic, adding or upgrading insulation at the same time is more efficient and less disruptive than a separate project. New ducts in a well insulated, well ventilated attic perform dramatically better than new ducts in attic not enough insulated. We also offer air duct cleaning when partial replacement leaves older sections in the system that benefit from cleaning.
Have questions about whether you need replacement or cleaning? Visit our FAQ page.


We Tell You When You Don't Need Replacement
We encounter homeowners regularly who have been told they need full duct replacement when what they actually need is a thorough cleaning or targeted repair of a specific failed section. We assess honestly, recommend specifically, and give you the full cost before any work begins. If cleaning is the right answer, that is what we
recommend even though replacement is a higher ticket job. Our business is built on trust, and that means telling you what you need, not what earns us the most.


Common Questions About Air Duct Replacement in San Antonio

How do I know if I need duct replacement or just cleaning?
The key indicators for replacement over cleaning are: physical damage (collapsed sections, disconnected joints), mold contamination in the duct liner material, ductwork older than 20 years showing deterioration, and performance problems that persist despite a functioning HVAC unit. An inspection will tell you clearly which situation you're in. We offer assessments and will give you an honest recommendation, cleaning if that is appropriate, replacement if that is what is needed.

How much does air duct replacement cost in San Antonio?
Depending on duct size, number of zones, duct material, and attic accessibility, price to repalce the air ducts is about $300-$450 per duct. We provide a firm quote after our inspection. Call 210-744-0079 to schedule an assessment.

How long does air duct replacement take?
A full residential duct replacement typically takes 1–2 days for an average San Antonio home. You'll have no HVAC service during the installation, so we schedule carefully to minimize inconvenience. We try to avoid peak summer heat days for jobs that require a full day interruptions to AC service.

Will new ductwork lower my energy bills?
In homes with leaky, damaged, or significantly deteriorated ductwork, yes. Often substantially. Energy Star estimates that leaky duct systems lose 20–30% of conditioned air before it reaches living spaces. Replacing a poorly performing system with properly sealed new ductwork eliminates this loss, reducing the load on your HVAC equipment and cutting the energy it consumes to condition your home.