Ductwork Replacement Cost in Texas: What to Expect

Published June 30, 2026   Boling-Iago, TX

If your energy bills keep climbing, some rooms never cool off, and the system runs longer than it should, the problem often is not the air conditioner at all. It is the duct system hidden in your attic and walls. Understanding ductwork replacement cost in Texas starts with understanding what actually goes into a duct system and why one home's quote looks nothing like the next.

Hunter's Air & Heat has an advantage most Wharton County contractors do not: we fabricate sheet metal in-house. Instead of ordering pre-made fittings and hoping they match your home, our team builds plenums, transitions, and metal duct runs sized to your system. That control over fabrication is one of the biggest factors in both the quality and the price of a duct replacement, and it is worth knowing how it fits into the overall cost picture before you request a quote.

What Determines Duct Replacement Cost

No two duct systems cost the same to replace because no two homes are built the same. The single largest driver is the total length of duct run your home needs. A compact single-story home with the air handler centered in the attic needs far less material than a sprawling ranch where supply runs have to reach distant bedrooms. Every additional linear foot of ductwork adds material and labor.

Material type matters just as much. Rigid sheet-metal trunk lines, insulated flexible duct branches, and fiberglass ductboard each carry different costs and different lifespans. The insulation value, measured as an R-value, also moves the number: higher R-value duct holds conditioned air temperature better across a hot Texas attic, but it costs more up front. The count of supply registers and return-air grilles factors in too, since each opening means another boot, another connection, and more balancing work.

Existing duct leakage and how your current system was built affect the scope. A system riddled with disconnected joints and crushed sections takes more labor to tear out and correct. Finally, accessibility drives labor hours. Ducts in a tight crawlspace or a low, cramped attic take longer to reach and replace than ducts in a walk-in attic. Because we handle our own ductwork and sheet-metal services, we can often build a cleaner, tighter system in fewer trips, which keeps labor predictable.

How the Cost Is Calculated

Most reputable contractors calculate duct replacement cost one of two ways: by the linear foot of duct run, or by the size of the HVAC system the ducts have to serve. Pricing by linear foot works well when only part of the system is being replaced, such as a few damaged runs. Pricing by system size, expressed in tons of cooling capacity, works better for a whole-home replacement because the duct has to be engineered to match the airflow the equipment produces.

The table below shows the relative factors that push a quote up or down. It does not list dollar amounts because your home's specifics decide the real number, and the only honest figure comes from an on-site measurement.

Cost Factor	Lower Cost	Higher Cost
Total duct length	Short, centralized runs	Long runs to distant rooms
System size	Smaller 2-ton system	Larger 4-to-5-ton system
Duct material	Insulated flex branches	Custom sheet-metal trunk lines
Insulation R-value	Standard R-value	High R-value for hot attics
Registers and returns	Reusing existing openings	Adding new supplies or returns
Accessibility	Walk-in attic	Tight crawlspace or low attic

Because Hunter's fabricates its own sheet metal, the trunk-and-plenum portion of your system is built to fit rather than forced to fit. That reduces the guesswork and the change orders that often inflate a duct quote midway through the job. When you request a free written quote from us, the number reflects the actual measured system, not a rough per-foot estimate.

Signs You Need New Ductwork

Ducts do not last forever, and in Southeast Texas the heat, humidity, and pests in an attic wear them out faster than in many parts of the country. Watch for these signs that your ductwork may be due for replacement rather than another patch:

• Uneven temperatures room to room. When one bedroom is always warmer than the rest of the house, undersized or leaking ducts are usually failing to deliver airflow where it is needed.
• Rising energy bills with no other explanation. Leaky ducts dump conditioned air into the attic. The U.S. Department of Energy notes that duct losses can account for a meaningful share of conditioned air, so the meter keeps running while comfort drops.
• Excess dust throughout the home. Gaps and disconnected joints pull attic dust and insulation fibers into the airstream and blow them out your registers.
• Ducts 15 years old or older. Flexible duct in particular degrades over time. Insulation compresses, inner liners tear, and connections loosen with age.
• Visible leaks or crushed sections. If you can see kinked flex duct, separated joints, or sections crushed by storage or foot traffic in the attic, those runs are no longer carrying the airflow the system was designed to move.

Repair vs. Replace, and Alternatives to Full Replacement

Full ductwork replacement is not always the right call. If the duct system is fundamentally sound and only a few joints have come loose, targeted repair and sealing can restore performance for far less than a complete rebuild. The decision comes down to the age, layout, and overall condition of what you already have.

Duct sealing is the most common alternative. A technician seals accessible joints and seams with mastic, a thick paste that stays flexible and airtight over time and outlasts ordinary duct tape by many years. For systems where the leaks are spread across hard-to-reach connections, aerosol-based duct sealing pushes a sealant through the system that finds and closes small leaks from the inside. Both approaches can recover a good deal of lost airflow when the ducts themselves are still in serviceable shape.

Sealing also pairs naturally with an air-quality upgrade. Once a duct system is tight, the air moving through it is only as clean as what enters it, so many homeowners add better filtration at the same time. Our air filtration options work best on a sealed, correctly sized duct system. When the ducts are too old, too undersized, or too damaged to seal effectively, replacement becomes the more economical long-term choice, and we will tell you plainly which situation you are in.

How to Save on Ductwork

There are legitimate ways to keep ductwork replacement cost reasonable without cutting corners. The biggest is timing: replacing ducts at the same time as a system installation shares the labor and the attic access, so you avoid paying twice to open up the same space. If you are already planning a new air conditioner or heat pump, that is the moment to address the ducts.

Replacing only the sections that need it, rather than the entire system, is another way to control cost when the rest of the duct is sound. Choosing the right insulation R-value for your attic instead of over-specifying also helps. Finally, getting a free written quote that itemizes materials and labor lets you compare fairly and avoid surprises. Ask about our maintenance options too, since keeping the system clean and sealed protects the investment you just made.

Frequently Asked Questions

Whether your ducts need a full rebuild or just a good seal, Hunter's Air & Heat will measure the system, explain your options, and put an honest number in writing. Call (979) 532-1707 or request a free written quote and let our in-house sheet-metal team show you what a properly built duct system can do.