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 Pasadena: What to Know First
If you own a home in Pasadena with air ducts that were installed using Abatement Technologies components, you’re likely dealing with leaks at connection points, plenum seams, or around the equipment itself. We seal those systems properly, usually inside one visit, using mastic and foil-backed tape applied to clean metal. Expect whole-system duct sealing in Pasadena to run $850 to $2,400 depending on how much of your ductwork is accessible and how many joints need work.
This page is for homeowners in Pasadena, Altadena, South Pasadena, and San Marino who have Abatement Technologies duct components and want an honest assessment of whether sealing makes sense or whether replacement is the smarter move. We’re an independent Abatement Technologies service provider, not a factory-authorized dealer. That matters because we tell you what your system actually needs, not what a manufacturer program says we should sell you. Call (626) 469-5477 for a free estimate.
- Who we are: Hollis Air Duct Pasadena, part of the Garrison Partners family, serving Pasadena since 2004.
- What we do: Duct sealing, air duct cleaning, and dryer vent cleaning using professional-grade equipment.
- What you get: A written price before work starts, background-checked uniformed technicians, and our 365-Day Done Right Promise on every job.
How Abatement Technologies Products Fail – and How We Fix Them
Abatement Technologies builds solid commercial-grade air handling components, but in Pasadena homes we see the same failure patterns repeat. Here’s what actually goes wrong and what we do about it.
- Prisim and AeroSeal-series duct board joints delaminate in attic heat. Pasadena attics hit 130°F or more in August. Fiberglass duct board from Abatement’s Prisim line can separate at factory seams after years of that heat cycling. The symptom is a dusty room far from the air handler, or a whistle you can’t locate. We open the joint, clean both faces, apply mastic, and re-fasten with mechanical clips before sealing.
- Round metal duct from the Abatement AIR-SEAL series leaks at crimped connections. Installers sometimes skip sealant on crimped slip joints, assuming the friction fit holds. It doesn’t. You lose 10 to 20 percent of your conditioned air into the attic. We pull the joint apart, clean it, apply a full bead of mastic, and lock it back with sheet metal screws rated for the gauge.
- Plenum takeoffs and flex duct collars separate over time. This is the most common Abatement Technologies failure we see in Pasadena homes built in the 1990s and early 2000s. The takeoff collar works loose from vibration, and the flex duct sags. Rooms at the end of the run go warm in summer. We reset the collar, strap the flex with proper saddles, and seal the connection with mastic, not just tape.
- Foil tape on Abatement registers fails in Pasadena’s dry climate. Pasadena’s low humidity and temperature swings cause adhesive on cheap foil tape to dry out and peel within three to five years. We remove failed tape, clean the register boot, and reseal with mastic or foil-backed butyl tape that stays flexible.
- Filter racks and equipment cabinets leak return air. Abatement filter housings and cabinet seams can pull air from unconditioned spaces. If you’re getting musty smells or excess dust, that’s often the cause. We seal the cabinet seams, check the filter fit, and close return-side gaps with mastic and backer rod where needed.
Styles & brands we work with
Our Abatement Technologies Duct Sealing Process
Here’s how a typical Abatement Technologies duct sealing job goes when you call us in Pasadena.
- 1
Call and schedule. A live person answers, 24/7. No voicemail loops. We set a window and we arrive inside it.
- 2
Inspection. Our technician walks your system, checks accessible duct runs, plenums, and registers, and identifies every leak point. We use a digital manometer to measure static pressure before anything gets sealed.
- 3
Written quote. You get a price in writing before any work starts. It doesn’t move at the door. If we find something unexpected, we stop and talk to you first.
- 4
Sealing. We use mastic and foil-backed tape appropriate for each joint. Parts decisions are made with you: OEM Abatement components where they matter, quality aftermarket where they’re functionally identical and less expensive.
- 5
Verification. We re-check static pressure and airflow after sealing. If the numbers don’t improve, we don’t call it done.
- 6
Cleanup and guarantee. The site is left clean. Every job is covered by our 365-Day Done Right Promise in writing.
Our crews run Rotobrush rotary brush systems and Nikro negative-air machines for pre-seal cleaning when needed, and we stock Abatement-compatible sealants and fasteners on the truck. Roy Castellanos learned the mechanical side of HVAC at Los Angeles Trade-Technical College and has been sealing ducts in Pasadena for over a decade, including plenty of older homes near the Rose Bowl that hadn’t been touched since the Reagan administration. The duct work doesn’t lie – and neither do I.
See the difference
Before
After
Before
After
Before
AfterWhat Abatement Technologies Duct Sealing Costs in Pasadena
Real numbers for the work we do in Pasadena:
- Single-room duct sealing (register boot and accessible run): $180 to $400
- Plenum and main trunk line sealing (attic or crawlspace): $450 to $900
- Whole-house duct sealing, accessible attic system (typical 1,500-2,500 sq ft Pasadena home): $850 to $1,600
- Whole-house duct sealing with significant duct board replacement or hard-to-reach crawlspace work: $1,800 to $2,400
- Pre-seal duct cleaning (if buildup is heavy enough to affect adhesion): $350 to $700 depending on system size
What moves the price: how much of your ductwork is accessible, how many joints need work, whether we’re dealing with duct board or sheet metal, and whether existing sealant has to be removed first. We don’t quote per-vent prices and we don’t lure you in with a teaser number. You get one written price for the whole job before we touch anything. Call (626) 469-5477 for a free estimate on your Abatement Technologies system.
Why Pasadena Homeowners Call Hollis Air Duct Pasadena for Abatement Technologies Work
We’ve been doing this in Pasadena since 2004, and we’ve built our reputation the slow way: show up when we said, price it before we touch it, do it by the book. The Garrison Code is what we call the standard our technicians follow on every job. Arrive inside the quoted window. Written price before work starts. Complete the job correctly. Leave the site clean. It’s not complicated, but it’s harder than it sounds, and most of our customers come to us after another company failed one of those four things.
Our technicians know Abatement Technologies components, but they also work on Lennox, Trane, and Carrier systems every week. That matters because your home is a system, not a brand label. The sealing decision on an Abatement duct run affects how your furnace and air conditioner perform. We look at the whole picture.
Every Abatement Technologies duct sealing job gets our 365-Day Done Right Promise in writing. If the seal fails within a year, we come back at no charge. That includes a free second visit, not a negotiated callback. Background-checked, uniformed technicians on every job. A live person answers the phone 24/7. And the price is always in writing before work starts.
FAQs
No. Duct sealing on the ductwork itself does not void manufacturer warranties on Abatement Technologies equipment like filter housings, cabinets, or air handling components. Sealing happens on the duct system, not inside the equipment. We don’t modify Abatement components structurally, and we follow the manufacturer’s installation specifications for any replacement parts. If you have a specific warranty document, we’ll review it with you before work starts.
Most whole-house duct sealing jobs in Pasadena take one full day, usually four to seven hours. Single-room or plenum-only work is often done in two to three hours. The variable is access: attic ductwork moves faster than crawlspace work, and duct board repairs take longer than sheet metal joint sealing. We’ll give you a time estimate with your written quote.
If your duct metal is sound and the leaks are at joints, seams, and connections, sealing is the right call and costs a fraction of replacement. If the duct board is crumbling, the insulation is failing, or the original install is so poorly laid out that losses are structural, we’ll tell you straight and give you replacement pricing. We don’t sell sealing on a system that’s past saving. That’s the whole point of hiring a company with nothing to hide: Roy Castellanos and his crew will tell you what actually needs doing versus what can wait.
Because they’re not quoting the same work. Cheaper bids often mean only accessible register boots get sealed, or the crew uses cheap foil tape that fails in Pasadena’s dry climate within a few years, or the price is a teaser that moves once the tech is inside. We give one written whole-system price before work starts. It doesn’t move. What we quote is what you pay.
We show you before and after photos of your own ductwork, including the specific joints we opened, cleaned, and sealed. We also measure static pressure before and after with a digital manometer so you can see the numbers change. If the numbers don’t improve, we don’t call the job done. Call (626) 469-5477 for a free estimate and we’ll walk you through what your system actually needs.
Written by Roy Castellanos, Owner, Hollis Air Duct Pasadena at Hollis Air Duct Pasadena, serving Pasadena and nearby areas.