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 in Dallas: What to Know First
Abatement Technologies duct sealing in Dallas typically runs between $450 and $1,400 depending on how much of your system needs work, and most jobs are completed in a single visit. We’re an independent Abatement Technologies service provider – not a manufacturer affiliate – and we seal the ductwork attached to their air filtration equipment, not the machines themselves. The price is written down before we touch anything, and it doesn’t move at the door. If you own an Abatement Technologies HEPA filtration unit or their Aire Guardian series in a Dallas home, this page covers what fails, what it costs to fix, and what we do differently.
Call (361) 309-6223 for a free estimate. Roy Castellanos and our Dallas crew handle the job from start to finish.
How Abatement Technologies Products Fail – and How We Fix Them
Dallas homes put real strain on duct systems. We see specific failure patterns with Abatement Technologies filtration units and the ducts they connect to. Here’s what actually shows up on our service calls:
- Aire Guardian UV-C series – return-side flex duct collapse. The Aire Guardian pulls hard on the return side, especially in Dallas attics where summer heat softens cheap flex duct. We find collapsed or kinked flex within six feet of the unit more than anywhere else. Fix: replace the failed section with mastic-sealed rigid or reinforced flex, then verify static pressure matches the unit’s spec. Most homeowners never feel it happen – they just notice rooms getting stale.
- HEPA filtration units (H-Series) – seal failure at the filter cabinet. Dallas dust is fine and relentless, and it works into the gap between the filter housing and the plenum. Once that seal degrades, unfiltered air bypasses the HEPA entirely – the machine runs, but you’re not getting the filtration you paid for. Fix: remove the cabinet, clean the mating surfaces, apply a proper duct-sealing mastic or Aeroseal-grade sealant, and re-torque. We test pressure drop before and after so you can see the number change.
- Abatement Technologies negative-air units used in whole-home setups – exhaust collar cracking. On older installs, the plastic exhaust collar on portable units gets brittle from Dallas attic heat cycling. Cracks at the collar mean the unit pulls air from the attic instead of through the ducts. Fix: collar replacement with an aftermarket metal collar that outlasts the original plastic, sealed with mastic rated for high-temperature attics. We’ve done enough of these to keep collars on the truck.
- Flex duct separation at supply plenums. This one isn’t brand-specific, but it’s worse with high-resistance Abatement Technologies filtration because the pressure differential works the connections loose over time. We find supply ducts that have pulled completely off the plenum, dumping conditioned air into the attic while the house fights to hold temperature. Fix: re-attach with proper fasteners, seal all seams with mastic, and inspect every supply run, not just the one you noticed.
- Zoning damper bypass leaks with multiple Aire Guardian units. When two or more units serve different zones, the damper actuators sometimes don’t close fully, and air bleeds into zones that shouldn’t be conditioned. The Fix: we test each damper individually with the system running, seal any leakage paths around the damper frame, and calibrate the actuator to seat fully.
Styles & brands we work with




Our Abatement Technologies Duct Sealing Process
Here’s how a typical job goes, from your first call to the final walkthrough:
- 1
Call and written estimate. You describe what’s happening – rooms that won’t cool, a unit that runs constantly, filtration that doesn’t seem to work. We give you a written price range before we ever send a truck, based on what you’ve told us and what we know about your home’s setup.
- 2
Diagnostic walkthrough. Roy or one of our senior techs walks the full duct system – attic, plenums, registers, and the Abatement Technologies unit itself. We look for exactly the failure patterns listed above, plus anything else that jumps out. Nothing gets touched until the diagnosis is done.
- 3
Parts decision. If your unit is under warranty, we’ll tell you what the manufacturer covers and what they don’t. If OEM parts make sense, we use them. If a quality aftermarket part does the job better – like the metal exhaust collar on older negative-air units – we tell you that too, with the price difference in writing.
- 4
The repair. We seal every seam, joint, and connection with mastic or approved sealant, not tape. Tape dries out in Dallas attics within two or three years. Mastic lasts the life of the duct if applied right.
- 5
Testing. We run the system and verify pressure, airflow, and that no air is escaping where it shouldn’t be. You’ll see the numbers if you want to. We don’t just say it works – we show you.
- 6
Cleanup and guarantee. We leave the attic cleaner than we found it, walk you through what we did, and hand you the written 365-Day Done Right Promise. If anything fails within a year, we come back free.
See the difference
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After
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AfterWhat Abatement Technologies Duct Sealing Costs in Dallas
Here are honest ranges for the Abatement Technologies duct sealing jobs we see most in Dallas. Every price is confirmed in writing before work starts – these are not estimates that balloon once the tech is in your attic.
| Job | Typical Dallas Price Range |
|---|---|
| Single duct run re-seal (supply or return) | $180 – $350 |
| Filter cabinet seal repair on HEPA unit | $220 – $400 |
| Full duct sealing – average Dallas home (10-15 runs) | $700 – $1,400 |
| Exhaust collar replacement (negative-air unit) | $150 – $300 |
| Flex duct replacement (per run, includes sealing) | $200 – $450 per run |
What moves the price: how accessible your attic is, how many runs need work, and whether the damage involves replacing material or just sealing. Every quote is one price per job – no per-vent add-ons, no surprise line items. Call (361) 309-6223 and we’ll walk through it on the phone.
Why Dallas Homeowners Call Hollis Air Duct Dallas for Abatement Technologies Work
We’ve been in Dallas homes long enough to know the difference between a system that needs sealing and one that needs surgery. Roy Castellanos completed his HVAC training at Los Angeles Trade-Technical College before bringing that discipline to Dallas, and our techs work the same way – methodical, no shortcuts on the inspection, no upsell you didn’t ask for. Every job gets a written price first. Every job is covered by the 365-Day Done Right Promise in writing. And we answer the phone – a live person, any hour, no voicemail loops.
The Garrison Standard runs every job we do: arrive inside the window, price it in writing, do it by the book, leave the site clean. We service Abatement Technologies alongside Lennox, Trane, and Carrier systems, so if your filtration setup feeds a mixed-brand HVAC system, we can handle the whole thing without bouncing you between contractors. As an independent Abatement Technologies service provider, we’re not beholden to any manufacturer – we tell you what’s actually wrong and what actually fixes it, and we put it in writing.
Clean ducts, straight answers – that’s the whole job.
FAQs
No. Proper duct sealing with mastic – done correctly – doesn’t void any Abatement Technologies manufacturer warranty on their filtration equipment. In fact, it protects the equipment by reducing strain from leaks and pressure loss. We always check your unit’s specific warranty terms before doing the work, and we’ll tell you in writing if a particular repair could affect coverage. If your machine is still under warranty, we’ll also tell you exactly which parts the manufacturer will cover and which they won’t, before you spend a dollar.
In almost every case we see in Dallas, this means air is bypassing the filter – either the filter cabinet seal has failed, or a return-side duct has collapsed or disconnected, or both. The unit runs because it’s trying to pull air through a leaky system, but a big portion of that air never passes through the HEPA filter. Once we seal the cabinet and repair the return side, the unit drops to its normal cycle and you’ll actually feel the difference. Call (361) 309-6223 and we’ll diagnose it – the estimate is free.
Duct leaks usually show up as uneven temperatures room to room, a dusty house even with filtration running, or higher bills with no change in comfort. Mechanical problems show up as the unit itself acting differently – strange noises, error codes, or the unit cycling on and off frequently. We check both because often it’s one feeding the other: a duct leak strains the unit until the mechanical part fails. The diagnostic is part of the free estimate.
Both, depending on what serves you better. If your unit is under warranty, we use OEM parts that the manufacturer will cover. If aftermarket parts do the job better – like the metal exhaust collars we install on older negative-air units to replace brittle plastic originals – we’ll tell you that, show you the price difference in writing, and let you decide. We never install a part that won’t hold up to Dallas attic conditions to save a few dollars.
We schedule most duct sealing jobs within a few days to a week depending on the time of year and how many runs are involved. A single-run seal or a filter cabinet repair can often be scheduled sooner than a full-system sealing. The best way to get a real answer is to call (361) 309-6223 – we’ll ask you a few questions about what’s happening and give you a straight answer on timing, with a written price before any work
Written by Roy Castellanos, Owner, Hollis Air Duct Dallas at Hollis Air Duct Dallas, serving Dallas and nearby areas.