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.
Fast, Reliable Duct Sealing Across South Whittier
Leaky ducts in South Whittier cost you money every month. The blower pushes conditioned air into the attic or crawlspace instead of your living room, and the system runs longer to compensate. On a 1960s ranch near Scott Avenue, that often means a 20 to 30 percent efficiency loss before we touch anything. Hollis Air Duct Long Beach seals ductwork the right way: camera inspection first, written price second, and mastic-sealed joints that hold. Call (562) 548-7365 for an estimate that won’t move after we arrive.
Why Hollis Air Duct Long Beach Is South Whittier’s Preferred Duct Sealing Company
We work on the homes South Whittier was built with. Most of the houses between Whittier Boulevard and Leffingwell Road went up between the 1950s and 1970s, and their ductwork is original. That means rigid metal, undersized returns, and connections that have been pulling apart for fifty years. Our crew knows what those systems look like inside because we’ve been inside hundreds of them across South Whittier.
Roy Castellanos runs this operation, and he holds every job to The Garrison Standard: arrive inside the window, write the price before work starts, do the job by the book, and leave the site clean. Background-checked, uniformed technicians are the only people who will walk through your door. If the work fails within a year, the Duct Sealing crew returns at no charge under the 365-Day Done Right Promise. That’s written on every invoice.
When a homeowner on Cole Road calls about a musty smell or a room that won’t heat, we can typically reach South Whittier the same week, and our live phone line is answered 24/7, not by a voicemail tree.
Styles & brands we work with
Air Duct Sealing in South Whittier
Air Duct Sealing in South Whittier means locating every leak, gap, and separated joint in your duct system and closing it with materials built to last in this climate. We start with a camera inspection, because guessing at leaks is how you end up paying twice. Then we seal the accessible runs with mastic, a thick adhesive compound that flexes with the metal as it heats and cools. In South Whittier attics, where summer temperatures climb past 130 degrees, mastic holds. Tape does not.
Where The Leaks Hide
Most leaks in South Whittier homes sit at the plenum, where the main trunk meets the air handler. Over decades, the sheet metal screws back out, the connection sags, and conditioned air spills into the attic. Return-side leaks are worse: they pull hot attic air and dust into the system, bypassing your filter entirely.
Materials That Match The House
We seal with mastic and aluminum-backed tape rated for high heat, not the grey fabric tape that cooks and peels within a year. For corroded sections we cut out and replace the metal, then seal the new joints. Disconnected runs get reconnected and strapped so they don’t pull apart again.
What To Expect
A typical duct sealing job in South Whittier runs $850 to $2,200, depending on how many runs need attention and how accessible the attic or crawlspace is. We give you a written price after the camera inspection, before any work begins. You approve it, we do it, and the price doesn’t move.
Duct Sealing Services in South Whittier
Duct Sealing Services in South Whittier cover the full range of what older systems need: sealing leaks, repairing separated joints, replacing corroded sections, and reconnecting returns that have pulled away from the plenum. The goal is a duct system that delivers the air you paid to condition, not one that leaks it into the attic over your head.
Return Duct Reconnection
Undersized returns from the 1960s and 70s often separate at the plenum, especially on single-story ranch homes. We reconnect them, seal the joint with mastic, and strap the run so it stays put. This one fix stops attic dust from entering the system and usually evens out room temperatures fast.
Pinhole Leak Sealing
Homes near the 605 freeway collect a fine grey silt inside their ducts – brake dust and tire wear that settles through the registers. That grit sits in the low spots of metal ducts and gradually corrodes the seam, creating pinhole leaks. We find them with the camera, then seal each one. If a section is too far gone, we replace it and seal the new joints.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in South Whittier
We work on duct systems connected to every major furnace and air handler brand found in South Whittier homes, and we carry the sealing materials and replacement sections to match. When the job calls for filtration upgrades after sealing, we supply and install products from Honeywell and Aprilaire. On jobs where the ducts need aggressive cleaning before sealing, our Rotobrush rotary brush and Nikro negative-air machines do the heavy lifting. Because we stock common transition sizes and mastic in the truck, most repairs happen in a single visit.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in South Whittier Homes
- Freeway-silt corrosion near the 605. Homes within a mile of the freeway collect fine grey brake dust in their returns. That grit settles into duct seams and corrodes the metal over time, opening pinholes that leak conditioned air into the attic.
- Collapsed or separated returns at the plenum. Undersized returns from the 1950s through 70s strain under negative pressure. The connection to the air handler sags, separates, and starts pulling unfiltered air from the wall cavity and crawlspace.
- Failed DIY tape on original seams. The grey fabric duct tape sold at hardware stores can’t survive a South Whittier attic summer. It dries, splits, and falls off within a season, leaving the original gap open again by fall.
- Fireplace ash accumulation in supply ducts. Homes with wood-burning fireplaces push fine ash into the return when the blower runs. That ash coats the inside of ducts, sticks to oily dust, and slowly chokes airflow at the registers.
Pricing for Duct Sealing in South Whittier, CA
Duct sealing in South Whittier most commonly runs between $850 and $2,200 per system. A single separated return on a ranch home might land around $850 to $1,100. A larger two-story home with multiple leak points, corroded sections, and a disconnected plenum typically runs $1,500 to $2,200. What changes the price is how many linear feet of duct need attention and whether we’re sealing, replacing, or reconnecting. We don’t charge by the vent and we don’t quote a teaser price that expands at the door. The price is written before we touch anything. Call (562) 548-7365 and we’ll schedule a camera inspection, then hand you a number you can hold us to.
We Also Serve Cities Near South Whittier
Our crews work throughout the Gateway Cities and coastal LA County. If you’re in Long Beach, Huntington Beach, Garden Grove, or San Pedro, we bring the same written pricing and 365-Day Done Right Promise to your door. Dispatch is coordinated from the brand’s Los Angeles office; our crews serve South Whittier locally.
Serving South Whittier, CA - Our Local Coverage Area
We’re based in the South Whittier area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Duct Sealing in South Whittier
You should expect a camera inspection first, because nobody can honestly price sealing without seeing the inside of the ducts. On a 1960s home, we’ll almost certainly find separated joints at the plenum, old tape that has failed, and possibly corrosion if you’re near the 605. After the inspection, we hand you a written price for the sealing work, and you decide what gets done. Call (562) 548-7365 and we’ll walk you through exactly what we’d do on your system.
Living near the 605 means fine brake dust and tire wear settle into your ducts through the return registers, and that silt accelerates corrosion at the seams. We find pinhole leaks in freeway-adjacent homes that rarely show up elsewhere. Sealing those holes stops attic air from bypassing the filter, which matters more for you because the dust load is constant. The fix is the same – camera inspection, then mastic sealing – but freeway homes often need more sealed feet than homes further east.
No, it is not too late. Original metal ducts from 1972 are usually still structurally sound; the problem is the connections and seams, not the metal itself. We seal the joints, reconnect anything that has pulled loose, and replace only the sections that have corroded through. The system gets another twenty years out of the existing ductwork in most cases. Call (562) 548-7365 for an inspection, and we’ll tell you honestly what needs replacing and what just needs sealing.
Sealing fixes the part of the problem that comes from inside your walls and attic, but it will not stop dust from entering through open windows or gaps around doors. What it does stop is the dust that gets pulled into the system through leaky return ducts during Santa Ana events – and in South Whittier that is often the larger share. If your registers blow dust even when the windows are closed, sealing the returns is the fix. We’ll show you the leaks on camera before we seal them.
If your 1950s or 60s home has asbestos-wrapped duct insulation, and we need to work on or near that insulation, you should have it tested before anyone disturbs it. We will not cut into or remove wrapped insulation without a test on file. If the sealing work can be done without disturbing the wrap, we proceed normally. We’ll flag it during the initial inspection and tell you exactly what needs testing and what doesn’t, so you’re not paying for abatement you don’t need.
Written by Roy Castellanos, Owner at Hollis Air Duct Long Beach, serving South Whittier with written pricing and the 365-Day Done Right Promise on every duct sealing job.