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.
Trusted Duct Sealing for Santa Clarita Homeowners
Leaky ductwork quietly costs Santa Clarita homeowners 20 to 30 percent of every heating and cooling dollar. The air you paid to condition escapes into attics, crawl spaces, and wall cavities before it ever reaches a single vent. Hollis Air Duct Santa Clarita has provided Santa Clarita Duct Sealing and repaired duct systems here since 2004, and every job runs on The Garrison Standard: a written price before we touch anything, background-checked uniformed technicians, and a 365-Day Done Right Promise in writing. If a seal fails within a year, we return and fix it at no charge. Call (661) 523-0295 for a free estimate.
The work matters here more than most places. Santa Clarita summers push attic temperatures past 140 degrees, and any unsealed joint in a supply duct becomes a hole your air conditioner is trying to cool the attic through. We’ll find those leaks, seal them with mastic, and show you exactly what was done before we leave.
Duct Insulation
Duct Insulation is the layer of thermal material wrapped around ductwork to keep conditioned air at the right temperature as it moves from your furnace or air handler to the register. In Santa Clarita, where summer attics run brutally hot, undersized or missing insulation means your AC works harder and rooms still come up short. Hollis Air Duct Santa Clarita wraps exposed ducts with the appropriate R-value insulation, seals any gaps underneath, and verifies the system is balanced before wrapping up. Typical duct insulation work for an average Santa Clarita home runs $900 to $2,100 depending on the linear footage of exposed duct and the insulation R-value required. The written price we quote is the price you pay.
Missing or degraded wrap
Old fiberglass wrap falls apart. When it does, the duct metal sweats in summer and the system loses efficiency fast. We’ll strip the failing material, clean the duct surface, and rewrap with the correct insulation for the attic conditions.
Condensation and moisture damage
Sweating ducts are usually an insulation problem, not an AC problem. If you see water stains on drywall near duct runs or mold starting on the wrap itself, the insulation has failed. We’ll replace it and check the underlying duct for rust or seam separation while we’re there.
Styles & brands we work with
HVAC Duct Sealing
HVAC Duct Sealing is the process of closing the seams, joints, and connection points along your heating and cooling ductwork so the system pushes air into living spaces instead of losing it into attics, crawl spaces, and wall cavities. Most Santa Clarita homes built before 2010 have duct systems that leak 20 percent or more of the air moving through them. Hollis Air Duct Santa Clarita uses commercial-grade mastic and foil-backed tape applied to every accessible seam, then runs a pressure test to measure the improvement. Most whole-system HVAC duct sealing jobs in Santa Clarita run $750 to $1,800 depending on the number of accessible runs and the current state of the existing seals. You’ll see the written number before we begin.
Supply-side leaks
The supply side carries conditioned air from the handler to your rooms. When those seams leak, you’re heating or cooling the attic. We’ll seal every accessible supply joint, boot, and takeoff so the air you paid for lands where it belongs.
Return-side leaks
Return ducts pull air back to the system. If they’re leaking, your unit is pulling in dust, attic heat, and garage fumes instead of clean house air. We’ll seal those runs and confirm the return pressure is balanced after the work.
Duct Repair
Duct Repair is the physical restoration of duct sections that have been crushed, separated, rusted through, or chewed open by rodents, and it often goes hand in hand with sealing. Santa Clarita’s older neighborhoods in Newhall, Saugus, and Canyon Country have duct runs that are decades old, and galvanized metal eventually gives way at the seams. Hollis Air Duct Santa Clarita repairs or replaces damaged sections, reconnects separated boots, and seals every junction before testing the system. Typical duct repair work runs $350 to $1,500 depending on how many sections need replacement and how accessible they are. Your written quote covers the whole job, no per-joint surprises at the end.
Crushed and kinked flex duct
Flex duct gets crushed by stored boxes, slipped tools, or poor original installation. A crushed six-inch flex line moves dramatically less air than it should. We’ll replace damaged flex runs, support them properly, and make sure the airflow to those rooms is restored.
Separated boots and takeoffs
When the metal collar connecting a duct run to the register boot pulls loose, conditioned air dumps straight into the wall cavity. We resecure the connection, seal it with mastic, and check the whole run for additional separation points.
Air Duct Sealing
Air Duct Sealing refers to the same core work as HVAC duct sealing but focuses specifically on the air-carrying portion of the system: the supply and return runs that move breathable air through your Santa Clarita home. This is the service we recommend when rooms at the far end of the house never quite reach the thermostat setting while other rooms stay comfortable. Hollis Air Duct Santa Clarita tests your system for leaks, seals every accessible seam with mastic, and retests to show you the measured improvement. Air duct sealing typically runs $750 to $1,800 for a complete system in a standard Santa Clarita single-family home. The price is written down before we start, and it doesn’t move.
Before-and-after pressure testing
We measure duct leakage before we seal and again after. That way you know exactly how much air you were losing and how much we recovered. If the number isn’t meaningfully better, the job isn’t done.
Room-by-room airflow checks
Sealing changes how air distributes through the house. We check register airflow in each room after the work to confirm the far bedrooms are finally getting the air they’ve been missing.
Duct Sealing Services
Duct Sealing Services cover the full range of work we do to stop air loss in residential duct systems: inspection, testing, sealing, and verification. For Santa Clarita homeowners, this is the service that pays for itself fastest when you consider that 20 to 30 percent of every heating and cooling bill is escaping through gaps you never see. Hollis Air Duct Santa Clarita handles everything from a single leaking boot to a whole-system seal, using mastic and foil-backed tape rated for HVAC use. Full duct sealing services on a typical Santa Clarita home run $750 to $1,800 based on system size and accessibility. You’ll get a written scope of work and a firm price before anything begins.
Whole-system sealing packages
This is the full treatment: every accessible supply and return run, every boot, every takeoff, every plenum seam. We test before and after, and we hand you the numbers. Most homes see a measurable air-loss reduction the same day.
Point repairs with sealing
Sometimes one bad joint is causing most of the trouble. We’ll locate it, repair it, seal it, and test the immediate run so you don’t have to pay for a whole-system job when a point repair does the job.
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.
Brands We Service
We work on duct systems connected to every major HVAC brand in Santa Clarita, and we see the full range: Carrier, Trane, Lennox, Rheem, Goodman, York, and everything in between. The sealing work doesn’t change based on the brand, but knowing how each manufacturer configures its plenums and takeoffs means we can access the seams without unnecessary cuts or guesswork. A Trane system in a Valencia two-story and a Goodman unit in a Canyon Country ranch house have different layouts, and we’ve sealed both more times than we can count.
For filtration and indoor air quality equipment, our crews work regularly with Aprilaire media filters, Honeywell electronic air cleaners, and Guardsman UV systems. We also run Rotobrush rotary brush systems and Nikro negative-air machines for the cleaning side of the home service. Whether you have a Carrier system, a Trane, or any other make, we can seal your ducts properly the first time.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Rooms that never reach the temperature you set. If the far bedroom is always five degrees off from the living room, the problem is rarely the thermostat. Air is leaking before it gets there. A sealed system fixes the imbalance instead of cranking the AC harder.
- Dust that comes back within days of cleaning. Return ducts pulling from an attic or crawl space draw in insulation fibers and dust every time the system runs. Sealing those returns stops the intake source at the leak itself.
- Utility bills that climb in mild weather. If your summer electric bill spikes in May when the weather is still fine, your system is running longer than it should because conditioned air is escaping somewhere. Sealing recovers that loss.
- Attic smells or garage fumes inside the house. A return leak can pull air from a garage, attic, or crawl space directly into your living areas. That’s not just unpleasant; it’s air you shouldn’t be breathing. We seal the return side first.
- Visible gaps, tape peeling, or crushed flex in the attic. If you can see the problem, it’s past time for a repair. Duct tape fails, flex gets crushed, and every gap is money leaving your system. We’ll assess what’s actually happening and give you a written price to fix it.
Our Process, Step by Step
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Walkthrough and system access. We start by locating every accessible duct run, boot, and takeoff in your attic, crawl space, and mechanical closet. You’ll know exactly what we’re looking at and where the system lives.
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Pre-sealing pressure test. We pressurize the duct system and measure the leakage rate in cubic feet per minute. This gives us a baseline number so we know what we’re fixing, not guessing at it.
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Sealing work with mastic and rated tape. Every accessible seam, joint, and connection gets sealed with commercial-grade mastic and foil-backed HVAC tape. Mastic is the trade-standard material because it doesn’t dry out and peel like household duct tape.
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Post-sealing pressure test. We run the same test again and compare the numbers. You’ll see the improvement in writing, measured in CFM recovered, before we pack up a single tool.
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Room-by-room verification and cleanup. We check register airflow in each room, confirm the far ends of the house are receiving air, and leave the site clean. Under The Garrison Code, the job isn’t done until the workspace looks like we were never there.
How Much Does Duct Sealing Cost in Santa Clarita?
A typical whole-system duct sealing job in Santa Clarita runs $750 to $1,800 depending on the size of the home, the number of accessible duct runs, and how much of the existing sealing has failed. A single point repair with sealing, like a separated boot or crushed flex section, runs $350 to $800. Adding insulation wrap to exposed duct runs typically adds $900 to $2,100 when the existing wrap has degraded. These are the ranges we operate in for standard single-family homes across Valencia, Newhall, Saugus, and Canyon Country.
What moves the price is mostly access. Attics with standing room and clear walkways are faster to work in than tight crawl spaces, and that shows up in labor time. The age of the system matters too: older ductwork with multiple failed joints takes more mastic and more care. What you should avoid is any quote based on a per-vent price. That pricing model invites a bait-and-switch where the initial number looks small and the final invoice doesn’t. Our estimate is a single written flat price for the whole job, agreed to before work starts, and it does not change at the door. Call (661) 523-0295 for a free estimate, and we’ll walk you through exactly what your system needs.
Our Service Area Near Santa Clarita
Hollis Air Duct Santa Clarita serves the entire Santa Clarita Valley including Valencia, Newhall, Saugus, Canyon Country, and Castaic, plus surrounding communities like Reseda, Granada Hills, Chatsworth, San Fernando, Porter Ranch, Panorama City, and Mission Hills. We also run crews for Duct Sealing in Sylmar and Duct Sealing in Northridge. If you’re in the Valley or the foothills, we’ll get a technician to you inside our quoted window, with a written price before any work begins.
Serving Santa Clarita, CA - Our Local Coverage Area
We’re based in the Santa Clarita area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Duct Sealing in Santa Clarita
Duct sealing is the process of closing the seams, joints, and connection points in your HVAC ductwork so conditioned air reaches your rooms instead of leaking into attics, crawl spaces, and wall cavities. In Santa Clarita, where summer attic temperatures routinely exceed 140 degrees, even small leaks cost you meaningful money. We seal with commercial-grade mastic, which stays flexible and doesn’t peel like household duct tape. Call (661) 523-0295 to have your system tested and get a written price.
Most whole-system duct sealing jobs in Santa Clarita take four to eight hours depending on home size and how much of the ductwork is accessible from an attic or crawl space. A point repair or single boot reseal can be done in under two hours. We’ll give you a firm time window when we schedule, and we arrive inside it.
Whole-system duct sealing in Santa Clarita typically runs $750 to $1,800 for a standard single-family home. Point repairs run $350 to $800, and adding insulation wrap runs $900 to $2,100 when needed. The price is written down before we start, and it doesn’t move at the door. Call (661) 523-0295 for a free estimate on your specific system.
Yes, we seal duct systems connected to Carrier, Trane, Lennox, Rheem, Goodman, York, and every other major brand found in Santa Clarita homes. The sealing work is the same across brands, but knowing each manufacturer’s plenum and takeoff configuration means we access the seams correctly the first time. We also service Aprilaire and Honeywell filtration systems.
For urgent situations like a crushed duct that’s killed airflow to a bedroom during a heat wave, we’ll prioritize getting a technician out as fast as our schedule allows. Our phones are answered by a live person 24/7, so you won’t sit in a voicemail queue when your system is struggling. Call (661) 523-0295 and we’ll work you in.
Every duct sealing job is covered in writing for a full year. If any sealed joint or repaired section fails within 365 days, we return and fix it at no charge. That includes a free second visit, no negotiation, no deductible. The promise is on every invoice, and it’s part of The Garrison Standard.
Clear a path to the attic access or crawl space entry, and move any stored items that block walkways in those spaces. That’s usually all we need. Most of the work happens outside the living areas, so your day goes on as normal while we’re up in the attic sealing runs. We’ll tell you if we need anything more specific when we confirm your window.
Schedule Your Duct Sealing Service in Santa Clarita Today
Stop paying to condition your attic. Call Hollis Air Duct Santa Clarita at (661) 523-0295 and we’ll test your system, show you the leakage numbers, and hand you a written flat price for the full job. No door-driven surprises, no per-vent games. We’ve served Santa Clarita since 2004, and every job is backed by the 365-Day Done Right Promise in writing.
Written by Roy Castellanos, Owner at Hollis Air Duct Santa Clarita, serving Santa Clarita since 2004.