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 Long Beach
Duct sealing in Long Beach typically runs $850 – $2,400 for a whole system, depending on home size, duct condition, and access. That’s the honest range we quote before any work starts, and the number does not move once we write it down. Our crews know the difference between a 1920s bungalow in Rose Park and a 1960s tract home in Los Altos, because the ductwork problems are not the same. If you’re losing conditioned air through rusted seams, disconnected runs, or degraded flex, call (562) 548-7365. Roy Castellanos and the Hollis Air Duct Long Beach team serve every Long Beach zip code, from 90802 to 90815.
Why Hollis Air Duct Long Beach Is Long Beach’s Preferred Duct Sealing Company
Long Beach homeowners call us because we write down the price before we touch the ladder. No bidding low and “discovering” problems once the registers come off. That matters in a city where half the housing stock predates 1960, and original ductwork rarely matches what the floor plan says it should be. We’ve crawled under enough 1920s Spanish-style homes along 4th Street and enough mid-century stucco boxes in Bixby Knolls to know that what’s behind the wall is often worse than what’s coming out of the vent.
Every job is covered by the 365-Day Done Right Promise. It’s not a handshake. It’s a written guarantee: if the seal fails within a year, we come back and make it right at no charge. That includes a free second visit. Our technicians are background-checked, uniformed, and they arrive inside the quoted window. When you call, a live person answers. At 2 a.m. or 2 p.m., you talk to a human, not a voicemail loop.
Our Duct Sealing team works with the same professional-grade equipment commercial crews use, including Rotobrush rotary brush systems and Nikro negative-air machines. We don’t show up with hardware-store gear and hope for the best. We show up with the tools that actually remove what’s clogging your ducts and the mastic that actually seals them. For Long Beach homeowners, that distinction is the difference between a fix that lasts and a bill that doesn’t.
Styles & brands we work with
Air Duct Sealing in Long Beach
Air Duct Sealing in Long Beach is the process of closing the leaks, gaps, and failed seams in your ductwork so the air you paid to condition actually reaches the rooms it’s supposed to. The coastal marine layer that sits over Long Beach for months at a time pushes salty, moist air into attics and crawlspaces. Metal ducts rust. Seams open. Taped joints fail. Sealing stops that loss, and in a city where summer humidity means your AC works double time, sealing is often the single highest-return fix a homeowner can make.
What We Find and What We Seal
In Long Beach’s older homes, original gravity-furnace ductwork often has disconnected or crushed runs hidden in crawlspaces. Sealing a system like that without reconnecting the runs first just pushes air into the dirt. We camera-inspect before we seal. When we find a crushed run under a 1930s bungalow in Rose Park, we repair it, then seal. The sealant itself is a water-based mastic, applied to seams and joints. For hard-to-reach pinholed metal, we use an injection method that fills the leaks from the inside.
When Sealing Alone Isn’t Enough
Post-war tract homes in Long Beach, especially those built in the 1950s and 1960s in neighborhoods like Lakewood Village, often have flex ducts whose inner liner has degraded from decades of sea-air humidity. You cannot seal a duct whose inner liner is falling apart. In those cases, we replace the run first, then seal the connections. A homeowner who skips replacement and pays for sealing on top of degraded flex gets a temporary solution and a recurring problem.
Duct Sealing Services in Long Beach
Duct Sealing Services in Long Beach cover everything from pinhole repair on rusted metal to full-system sealing after a cleaning. The job starts with a camera inspection of the supply and return runs. We’re looking for what decades of salt air has done: rusted seams, separated joints, crushed sections, and the sticky sand-salt coating that builds up in beach-adjacent homes like those in Belmont Shore and Naples Island. If sealant cannot adhere to the surface, the seal will fail. So we clean first, then seal.
Whole-System Sealing
For homes losing more than 15 percent of conditioned air through leaks, we seal the entire system: every accessible seam, joint, and connection. This is the most common job in Long Beach’s older housing stock, where original ducts were never sealed in the first place. A typical 1,500-square-foot home takes one crew about four to six hours.
Targeted Repair Sealing
Sometimes the problem is confined: a rusted trunk line in the crawlspace, a separated return in the attic, a disconnected run under a hallway. We seal what’s broken and leave what’s sound. This is the lower-end price range, and it’s common in Long Beach homes where previous owners patched problems rather than fixing them right.
What happens when you call
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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 Long Beach
We stock and service duct components and filtration products from Honeywell, Aprilaire, and Abatement Technologies, so Long Beach customers are not waiting on parts shipped from somewhere else. If your system uses Aprilaire filtration and the duct connections around the filter housing are leaking, we seal them with the right mastic for the job. If your return plenum needs a Honeywell-compatible replacement collar, we have it on the truck. That’s the operational difference between a crew that serves Long Beach and a crew that just shows up there.
Common Duct Sealing Problems We See in Long Beach Homes
- Salt-corroded metal seams in 1920s – 1950s bungalows. The coastal air penetrates attics and crawlspaces, rusting unlined duct seams from the outside in. Pinhole leaks pull in attic dust and moisture, degrading air quality year-round.
- Disconnected or crushed gravity-furnace runs. Original gravity systems in homes built before 1950 often have runs that were never properly connected or have collapsed under decades of settling. Sealing without reconnecting these runs wastes heated air into the crawlspace.
- Degraded flex duct liners in post-war tract homes. The inner liner breaks down from Long Beach’s persistent humidity, making the duct impossible to seal. Replacement has to happen before any sealing work can hold.
- Sticky sand-salt buildup in Belmont Shore and Naples Island. Open-window ocean breezes deposit a fine, adhesive mix of beach sand and salt spray inside ductwork. Sealant will not bond to that surface, so deep cleaning must precede sealing, or the job fails within weeks.
See the difference
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After
Before
After
Before
AfterPricing for Duct Sealing in Long Beach, CA
Here’s where Long Beach homeowners get straight numbers. Targeted sealing of one or two problem areas runs $450 – $950. Whole-system sealing for a typical 1,200 – 1,500 square foot home falls between $850 – $1,800. Larger homes with extensive crawlspace or attic access, especially those in the hillside stretches of Signal Hill or the larger properties in Park Estates, run $1,800 – $2,400. If your ducts need cleaning before sealing, add $350 – $650. If degraded flex runs need replacement, that’s $150 – $300 per run, materials and labor included. You’ll know your exact number before we start. Call (562) 548-7365 for a free, written estimate.
We Also Serve Cities Near Long Beach
Our crews handle duct sealing work in Wilmington, Carson, Seal Beach, and San Pedro. The same written pricing and 365-Day Done Right Promise apply, no matter which side of the harbor you’re on. If you’re in Seal Beach with the same sand-salt buildup we see on Naples Island, you’ll get the same clean-first, seal-second approach. Call us at (562) 548-7365 to schedule.
Serving Long Beach, CA - Our Local Coverage Area
We’re based in the Long Beach 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 Long Beach
Sealing matters more because Long Beach’s coastal marine layer pushes salty, moist air into ductwork year-round, rusting seams and degrading flex liners faster than the dry inland heat does in cities 20 miles north like Downey or Norwalk. A leaky duct in Long Beach is actively pulling in damp, salt-laden attic air, which carries mold spores into your living space. That’s a different problem than an inland leak, which mostly just wastes cooled air. Sealing closes that pathway, and on a humidity-heavy September day, you’ll feel the difference.
We seal from the attic and crawlspace, not through the walls. In a 1920s Spanish-style bungalow, the original ducts are typically accessible from above or below without opening any plaster. We camera-inspect the runs, identify the failed seams, and apply mastic or injection sealant through the existing access points. The plaster stays intact. We’ve done this in Rose Park, Bluff Heights, and along 4th Street where the original wall finishes are part of what makes the house worth owning in the first place. Call (562) 548-7365 and we’ll walk the site with you before anyone touches a register.
No, and we won’t charge you to try. Once the inner liner of a flex duct has degraded from years of humidity, sealant cannot bond to the surface. Attempting to seal it anyway gives you a temporary patch that fails within months. We replace the run, then seal the new connections. It costs more up front, but it’s the only approach that holds. A crew that says they’ll “just seal it” is either lying or guessing. We won’t do either.
Yes, especially in Belmont Shore, Naples Island, and the Peninsula, where a sticky sand-salt mix coats the interior of the ductwork. Sealant requires a clean surface to adhere. We run a HEPA-filtered negative-air cleaning pass first, then camera-inspect to confirm the surface is ready, then seal. Skipping the cleaning is the fastest way to a failed seal and a callback. We’d rather do it right once than do it wrong and have you wondering if we actually did anything.
If your system was cleaned recently but rooms at the end of the run still feel stale, humid, or barely conditioned, you’re losing air through leaks. A persistent musty smell that returns within weeks of cleaning points to pinholes pulling in attic or crawlspace air. Rooms that are consistently 5 – 8 degrees off from the rest of the house, especially upstairs rooms in the mid-century homes of Los Altos, are the classic symptom. Cleaning removes what’s in the ducts. Sealing stops what’s getting into them. For a camera inspection to tell you which one you actually need, call (562) 548-7365.
Call Hollis Air Duct Long Beach for Duct Sealing That Actually Holds
You’ll get a written price before any work starts, a crew that shows up inside the quoted window, and a one-year guarantee in writing. If the seal fails, we return at no charge. That’s the Garrison Standard, applied to every Long Beach job we take. Roy Castellanos and our team serve the entire city, from the shoreline to the 405. Call (562) 548-7365 now for a free estimate. A live person answers, day or night.
Written by Roy Castellanos, Owner at Hollis Air Duct Long Beach, serving Long Beach since 2004.