Duct Repair & Replacement in San Antonio
Your ductwork is the part of your comfort system you never see — and it's often where the problem hides. Leaky, damaged, or poorly designed ducts can waste a large share of the air you've paid to heat and cool before it ever reaches your rooms, leaving some spaces uncomfortable no matter how hard your system works. We inspect, seal, repair, and replace ductwork across San Antonio, Schertz, and Cibolo, so the comfort you're paying for actually reaches you.
Dust and Air Quality
Strain on Your Equipment
Wasted Air, Higher Bills
Air escaping through leaky ducts is air you paid to condition and never got to use. Sealing and repairing those losses means more of your system's output reaches your rooms — and less of your money leaks into the attic.
Leaky return ducts pull air from attics and wall cavities — along with the dust and debris that live there — and push it into your home. Sealing the system properly keeps that unfiltered air out of what you breathe.
Why Ductwork Matters More Than Most People Think
The Hidden Half of Your Comfort System
Rooms That Never Get Comfortable
If one room always runs hot or cold while the rest of the house is fine, the ductwork feeding that space is often the reason — a disconnected run, a crushed section, or a duct that was never sized right to begin with.
When ducts leak or restrict airflow, your AC or furnace runs longer to make up the difference. That extra runtime means more wear on equipment you've already paid for, and a shorter service life.
If your ducts are dirty but sound, that's a duct cleaning question — but if they're leaking, crushed, or disconnected, no amount of cleaning fixes that. That's what this page is about.
Testing & Verification
Before we consider the job done, we confirm the system is delivering air the way it should — checking airflow and verifying that the losses we set out to fix are actually gone. You get a comfort improvement you can feel, not just a promise that the work was done.
Before we consider the job done, we confirm the system is delivering air the way it should — checking airflow and verifying that the losses we set out to fix are actually gone. You get a comfort improvement you can feel, not just a promise that the work was done.
Your Options and an Upfront Price
How It Works
Our Ductwork Process
1
Inspection & Assessment
We start by evaluating your entire duct system — checking for leaks, disconnected or crushed runs, poor connections, undersized returns, and insulation problems. We identify not just where air is being lost, but why, so the work we recommend actually solves the underlying issue rather than treating a symptom.
2
Once we know what's going on, we walk you through what we found in plain language and lay out your options — sealing and repairing what's there, replacing damaged sections, or redesigning the system where it was never right to begin with. You'll have a clear, upfront price before any work starts, and the choice of how far to take it stays yours.
3
Sealing & Repair
For most duct problems, the fix is sealing the leaks and repairing the damaged connections. We seal joints, boots, and connections properly — at the source, by hand — and reconnect or replace the sections that have failed, so the system holds the air it's supposed to move.
4
Replacement & Redesign
5
Your Options and an Upfront Price
When ductwork is too damaged, deteriorated, or poorly designed to repair, replacement is the honest answer. We remove the old ducting and install a properly sized, properly routed system built around how your home actually uses air — which is often the single biggest comfort improvement an older home can get.
Testing &
Verification
Before we consider the job done, we confirm the system is delivering air the way it should — checking airflow and verifying that the losses we set out to fix are actually gone. You get a comfort improvement you can feel, not just a promise that the work was done.
Damaged Ducts and Duct Cleaning
If you were quoted duct cleaning but your ducts are actually damaged or deteriorated, cleaning can do more harm than good. We'll tell you honestly whether cleaning, sealing, or replacement is the right call.
Duct Replacement & Redesign
When ductwork is too far gone or was never designed right, we replace it with a properly sized, properly routed system. For many older homes, this is the single biggest comfort upgrade available.
Duct System Installation
Duct Repair & Sealing
Leaks, disconnected runs, crushed sections, and bad connections — we find where your system is losing air and seal and repair it at the source, so more of your conditioned air reaches your rooms.
Designed, Not Guessed
We Size Ducts to Manual D — Not to Whatever Was There Before
A lot of duct problems trace back to a system that was never designed properly in the first place — ducts sized by habit or by copying whatever the last installer left behind. When we design or replace a duct system, we follow Manual D, the industry standard for duct design. Starting from a Manual J load calculation of what your home actually needs, we size and route each run so the right amount of air reaches every room. The result is a system that's balanced by design rather than by luck — which is why a properly designed duct system often solves comfort problems that no amount of adjusting the thermostat ever could.
When ducts are replaced alongside a new system installation, we design the whole airflow path together.
Signs Your Ductwork Needs Attention
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Some rooms are always hotter or colder than the rest of the house.
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Your energy bills are high for the comfort you're actually getting.
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Certain rooms have weak airflow from the vents no matter the setting.
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Your home is unusually dusty, or dust returns quickly after cleaning.
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You can see disconnected, crushed, or sagging ducts in the attic or crawlspace.
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The ductwork is old, and the flex duct looks torn, brittle, or compressed.
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Your system runs constantly but never quite keeps up.
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You've added rooms or renovated, and the original ductwork was never adjusted.
Leaky ducts also pull in dust and attic air, which is why duct problems and indoor air quality so often go hand in hand.
Q: How do I know if my ducts are leaking?
A: The usual signs are uneven room temperatures, high energy bills for the comfort you're getting, weak airflow at some vents, and excess dust. During our inspection we identify exactly where and why air is being lost, so you're not guessing.
Q: Can leaky ducts be sealed, or do they need to be replaced?
A: It depends on the condition. Many duct problems can be solved by sealing leaks and repairing connections at the source. When ductwork is too damaged, deteriorated, or poorly designed, replacement is the more lasting fix — and we'll tell you which situation you're in.
Q: How much air are leaky ducts actually wasting?
A: In many homes, poorly sealed or damaged ductwork loses a significant share of the conditioned air the system produces before it ever reaches the rooms. That's air you paid to heat or cool, escaping into the attic. Sealing and repairing it is one of the more cost-effective comfort improvements available.
Q: Will fixing my ductwork really lower my energy bills?
A: When your ducts are losing a meaningful amount of air, sealing and repairing them means your system doesn't have to run as long to reach the same comfort — which shows up on your bill and reduces wear on your equipment.
Ductwork Questions
Related Air & Comfort Services in San Antonio
Dirty ducts, not damaged ones?
If your ducts are intact but dusty, cleaning may be all you need — and honestly, most homes never do.
We'll tell you straight whether cleaning makes sense for your home or whether it's money better left
in your pocket.
Chasing better air, not just better airflow?
Sealed, properly sized ducts are the foundation, but filtration and purification finish the job. If
dust or allergies are the real problem, we'll walk you through your indoor air quality options.
Paying to cool rooms that never get comfortable? Let's find out why.
An honest inspection, upfront pricing, and ductwork sealed, repaired, or replaced the right way.
We repair and replace ductwork in your area.