Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
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.
Abatement Technologies Duct Sealing & Repair: The San Antonio Owner’s Guide
We stock and install Abatement Technologies-compatible duct sealing and repair components across San Antonio, with most sealing jobs running $325 to $680 installed depending on your system size and how much of the duct runs need addressing. If your Abatement Technologies containment unit or duct board is leaking air, showing joint separation, or your HEPA filtration is pulling contaminated air past the seals, we can usually get a technician to your home within one business day. Most San Antonio homeowners discover the failure the hard way: a spike in the electric bill during the summer, dust settling on furniture right after a cleaning, or a whistling sound near the mechanical room that was not there last spring.
Which Abatement Technologies Models This Applies To
Abatement Technologies builds negative-air containment systems and duct accessories across several product lines, and the sealing approach differs depending on what you own. If you have one of their HEPA-AIRE portable air scrubbers (the PAS and HEPA-AIRE series), you are mostly dealing with flex duct connections, inlet/outlet gaskets, and filter housing seals. If you have a Shieldex or HEPA-AIRE containment cart, the sealing points sit at the bag-out port, the inlet collar, and the panel seams. The quickest way to identify what you need is to check the metal data plate on the back or side of the unit. It will list a model number and manufacturing date. Write it down before calling us. It saves a trip back out. On the OEM versus aftermarket question: Abatement Technologies gaskets and seals are well made, but after 8 to 10 Texas summers, the foam and rubber degrade regardless of brand. We stock both OEM Abatement seals and a line of quality aftermarket equivalents that match or beat the factory spec. If your unit is still under warranty, we recommend OEM parts. If not, the aftermarket option usually saves you 20 to 30 percent without a performance difference we can measure.
Styles & brands we work with
Signs Your Abatement Technologies Duct Sealing & Repair Is Failing
- Air leaking around the filter housing. The gasket between the filter frame and the housing compresses over time and loses its grip. You will feel cold air escaping around the filter door even when the unit is running. This is the most common failure we replace in Abatement Technologies units in San Antonio homes.
- Dust accumulating in the mechanical room. When the negative pressure drops, the unit stops pulling contaminants into the filter and starts letting them recirculate. If you are seeing drywall dust or attic debris near the air handler, the containment seal is likely failing.
- The unit is louder than it used to be. Torn flex duct connections or cracked collars whistle and vibrate. A tight system is quieter. When owners tell us the unit “used to be quiet,” we almost always find a separated seam or a split duct connector.
- Your energy bills climbed without a change in usage. In San Antonio’s heat, a leaking duct system means conditioned air is spilling into unconditioned spaces. The Air Conditioning Contractors of America notes that duct leakage routinely accounts for 20 to 30 percent of system energy loss in typical homes. A failed seal on a containment unit makes that worse.
- Visible cracks or separation at the duct board joints. Duct board expands and contracts with our temperature swings. After several years, the foil tape and mastic peel back. If you can see daylight or feel air at a joint, the seal has failed and needs a proper re-seal, not a layer of hardware-store tape.
Replacement Cost & What’s Included
Most Abatement Technologies duct sealing and repair jobs in San Antonio run between $325 and $680 installed. The lower end covers replacing a single gasket or re-sealing one or two accessible joints. The higher end covers full containment-unit re-sealing, replacement of multiple flex duct connectors, and labor on units that sit in tight mechanical closets. You will receive a written price before any work starts. That price does not change at the door. Every Abatement Technologies repair includes our 365-Day Done Right Promise: if the work is not right within a full year, we return and correct it at no charge. This is also the kind of repair where we can pull the failed part off the unit and show it to you before we install the replacement. No hidden charges, no partial work.
See the difference
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AfterDIY or Call Us?
There is a safe middle path here, and we will be honest about it. You can inspect your Abatement Technologies unit yourself. Check the filter door gasket for brittleness. Look at the flex duct collars for visible gaps. Feel for air escaping around the seams while the unit runs. That is where DIY should end. The danger with duct sealing is not electrical or mechanical. The danger is doing a half-job and thinking you fixed it. A gasket that is “mostly” sealed is still leaking. A mismatched aftermarket seal from a big-box store will fail within a season. And in a San Antonio attic in July, working with mastic and duct board is not a weekend project. This is a repair where the right gasket, properly seated, does the job for years. The wrong one wastes a Saturday. If what you found during inspection makes you think the seal has failed, call us at (254) 347-3897. We will quote it flat before the work begins.
FAQs
In our experience, expect 8 to 10 years from the factory seals before the combination of heat and dry air starts breaking down the foam and rubber. After that, small leaks become visible at the gasket edges and flex duct collars. The extreme attic heat in San Antonio accelerates this, so units in unconditioned spaces tend to fail faster than those in garages or utility rooms. If your unit is past the decade mark, budget for a proactive re-seal before a hard failure. Call (254) 347-3897 and we can quote a full re-seal for your specific model.
It depends on the seal’s condition and location. A torn flex duct connector can sometimes be trimmed and re-attached if the remaining material is intact. A compressed gasket cannot be revived. Once a foam or rubber gasket hardens or takes a set, no amount of sealant will restore the original compression. We will tell you which applies to your unit after one look, and we will not recommend a repair that will not hold. Call us for an honest assessment.
A single gasket replacement or simple joint re-seal typically takes 45 to 90 minutes. A full containment unit re-seal with multiple duct connector replacements can run 2 to 3 hours. What slows the job down is access. Tight mechanical closets, attic installations, and units stacked with other equipment can add time, and we will factor that into the written estimate before we start. The estimate you get is the estimate you pay.
Our trucks carry the gaskets, collars, duct board, mastic, and flex connectors used on the most common Abatement Technologies units, including the HEPA-AIRE and Shieldex lines. We also stock parts for Lennox, Trane, and Carrier systems for when the sealing issue traces back to the main HVAC. If you have an older or less common Abatement unit, we can source the exact part within a business day in most cases. Call (254) 347-3897 with your model number and we will tell you straight what we have on the truck.
Get Your Abatement Technologies Duct Sealing Fixed Right
If your Abatement Technologies unit is leaking, whistling, or simply not holding negative pressure the way it used to, do not wait until a San Antonio summer forces the issue. Call Cardinal Air Duct San Antonio at (254) 347-3897. We will give you a written price before any work begins, the repair is backed by the 365-Day Done Right Promise, and Omar Haddad and his crew will show you exactly what failed and what we replaced. Clean ducts, straight answers, real price – that’s the whole pitch.
Written by Omar Haddad, Owner, Cardinal Air Duct San Antonio at Cardinal Air Duct San Antonio, serving San Antonio and nearby areas.