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 Echo Park
Duct sealing in Echo Park typically costs $450 – $1,800 per system depending on duct accessibility, linear footage, and whether we’re working in a crawl space, attic, or both. Most hillside homes here need more than a quick tape job. We’re talking about mastic-sealed joints, re-aligned runs, and verification testing. We serve Echo Park neighborhoods including Elysian Heights, Angelino Heights, and the streets off Alvarado and Sunset. If your vents smell like crawl space or your allergies spike indoors, call (626) 469-5477. We’ll give you a written price before any work starts.
Why Hollis Air Duct Pasadena Is Echo Park’s Preferred Duct Sealing Company
Echo Park homeowners call us because they’ve already learned what a cheap duct cleaning job looks like. A crew shows up, runs a vacuum for an hour, hands over a bill, and nothing changes. That doesn’t fly here. The Echo Park homes we work on sit on hillsides with pier-and-beam foundations. Ductwork tucked under floors and behind original plaster walls doesn’t forgive shortcuts. Our technicians arrive in uniform, background-checked, and inside the quoted window. Every job gets a written price before we touch anything. If the work fails within a year, the 365-Day Done Right Promise means we return at no charge. Roy Castellanos runs our crews, and he holds every tech to the Garrison Code: arrive on time, price it in writing, finish by the book, leave the site clean.
Styles & brands we work with
Air Duct Sealing in Echo Park
Air Duct Sealing in Echo Park means finding and closing the gaps in your ductwork that let conditioned air escape into attics, crawl spaces, and wall cavities before it ever reaches your rooms. In a flatland tract home, the ducts follow predictable paths. On a hillside lot off Lemoyne or Cerro Gordo, the runs bend around framing, piers, and retrofit junctions. Sealing here means getting eyes on the entire system with a camera, finding where joints have separated, and applying mastic and aluminum tape the right way. Expect to pay $450 – $1,800 per system. A typical 1920s Spanish Colonial with two systems and a converted attic will land in the middle of that range.
Camera Inspection Before Sealing
We don’t seal blind. Every Echo Park job starts with a camera pushed through the duct runs so we can see exactly where the leaks are. That matters when ducts run under a pier-and-beam floor or through a tight attic where you can’t physically reach every joint.
The camera also tells us whether sealing will even solve your problem. A kinked flex duct in a cramped attic needs replacement, not mastic. We’ll show you the footage before we quote anything.
Mastic and Tape, Done by the Book
Hardware-store duct tape fails. It dries, peels, and falls off within a season or two. We use duct mastic and UL-rated aluminum foil tape, applied in layers at every accessible joint, plenum connection, and register boot. On Echo Park homes with uninsulated metal ducts, we seal first and then wrap exposed runs in crawl spaces so winter dampness can’t condense on the metal and degrade the seal.
Duct Sealing Services in Echo Park
Duct Sealing Services in Echo Park cover the full job: inspection, sealing, re-alignment, and verification testing so you know the work held. The scope depends on what your house throws at us. A 1920s bungalow on a pier-and-beam foundation in the flats has different problems than a mid-century hillside house off Scott Avenue where the ducts shift with every small quake. You should budget $450 at the low end for a single accessible system and up to $1,800 when multiple runs snake through inaccessible spaces. We write the price down before we start, and that number doesn’t move.
Blower Door Verification
After sealing, we pressurize the system and measure leakage with a blower door test. That’s how we confirm the gaps are actually closed, not just visually patched. If the numbers don’t improve, we keep working until they do. This is the step most companies skip because it costs them time. We don’t skip it.
Re-Aligning Shifted Ducts
Seismic settling does more than crack mastic. It pulls duct sections apart at the joints, leaving open gaps that suck crawl-space air into your supply runs. We re-align the sections before sealing, so the fix holds instead of just covering a gap that will reopen.
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 Echo Park
Echo Park homes carry a mix of original gravity-heater conversions, retrofitted forced-air systems, and newer heat pump installs. We work on all of them. Our crews use Rotobrush rotary brush systems for mechanical cleaning and Nikro negative-air machines to capture debris during sealing prep. When filtration comes up, we install and service products from Aprilaire and Honeywell. We keep common sealants, mastics, and tape on the trucks, so a job on a hillside street doesn’t stall while someone drives to a supply house in Glendale. You call, we show up ready.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Echo Park Homes
- Seismic-shifted joints on hillside streets. Decades of settling along Lemoyne and Cerro Gordo pull duct sections apart at the seams. Mastic cracks, gaps open, and crawl-space dust gets pulled into your supply air. Sealing here means re-aligning first, then sealing.
- Sweating metal ducts in crawl spaces. Echo Park’s cool, damp winters cause uninsulated metal ducts under pier-and-beam floors to sweat. That condensation softens tape and mastic, which leads to re-leakage and sometimes mold. We seal, then wrap the exposed runs.
- Compressed flex ducts in tight attics. Retrofitted flex ducts in 1920s attics get crushed under storage boxes or roofing work. No amount of mastic fixes a kinked duct. We replace the damaged section, then seal the new connections properly.
- Buried runs nobody sees. Most Echo Park leakage happens in the long runs under floors and behind walls, not at the visible registers. Homeowners seal what they can see and wonder why nothing improves. Our camera inspection finds the leaks you can’t reach.
Pricing for Duct Sealing in Echo Park, CA
Most single-system duct sealing jobs in Echo Park run $450 – $900 when ducts are accessible and the home is under 1,500 square feet. Larger hillside homes with two or three separate systems, long crawl-space runs, or hard-to-reach attics run $900 – $1,800 per system. The biggest cost driver here is access: pier-and-beam crawl spaces and cramped attics take longer to work in. We give you one flat price per system before any work starts. No per-vent pricing, no add-on surprise. Call (626) 469-5477 for a free estimate. We’ll walk the house, check the systems, and write down a number you can hold us to.
We Also Serve Cities Near Echo Park
Our Duct Sealing crews cover Echo Park and the surrounding area, including Pasadena, Glendale, Downtown Los Angeles, and Burbank. Scheduling is coordinated from our Los Angeles office, so when you call about a hillside house in Echo Park, you’re talking to someone who knows the streets and the housing stock across the whole metro.
Serving Echo Park, CA - Our Local Coverage Area
We’re based in the Echo Park 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 Echo Park
You should receive two things: camera footage or photos of the sealed joints before and after, and a blower door test result showing reduced duct leakage, usually expressed as CFM (cubic feet per minute). Without verification testing, you’re taking someone’s word for work you can’t see. Hollis Air Duct Pasadena does camera inspection before sealing and blower door verification after. If a company won’t show you the footage or the numbers, call (626) 469-5477 and we’ll do it right.
Yes. Each system gets its own inspection, sealing, and verification. That’s why we price per system, not per house. A home with an attic system, an under-floor system, and a converted sunroom unit has three sets of ductwork with three different leak profiles. Sealing one and ignoring the others fixes only a third of your air loss. Tell us how many systems you have when you call, and we’ll quote each one separately.
Sometimes, but only if the smell is coming from crawl-space air being pulled into leaky return ducts. Echo Park’s damp winters make crawl spaces musty. If return ducts under the floor have gaps, they pull that air into your supply system and out your vents. Sealing the leaks stops the smell at the source. If the smell comes from mold growing inside the ducts themselves, sealing alone won’t fix it – you’d need cleaning and possibly duct replacement. We’ll tell you which one you’re dealing with after the camera inspection. Call (626) 469-5477.
Yes. Ducts behind original plaster walls can’t be accessed without cutting into the wall, which nobody wants. We seal what’s reachable at the joints, plenum connections, and register boots, then use the blower door test to check how much leakage remains. If inaccessible runs are leaking badly, you may need to consider re-routing the duct through an accessible space rather than opening up your plaster. We’ll show you the numbers and let you decide, with a written price for either option.
You should get a written invoice listing exactly what was sealed, where, and with what materials; before and after photos or camera footage; and a blower door test result showing the before and after leakage numbers. That documentation matters for resale, for warranty claims, and for your own records when you sell a hillside Echo Park house with retrofitted HVAC. Buyers and inspectors ask about ductwork. We hand you the paperwork without you having to ask. Call (626) 469-5477 for a free estimate and you’ll see what we mean.
Written by Roy Castellanos, owner at Hollis Air Duct Pasadena, serving Echo Park and the surrounding Los Angeles area.