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 Santa Clarita
Duct sealing in Santa Clarita typically runs $450 – $1,200 for a single system, depending on how many leaks we find and whether the ducts need debris removal first. Most jobs in the Santa Clarita Valley take one day, and our crews arrive with a written price before any work starts. If you’re noticing dust on furniture within days of cleaning, rooms that never hold temperature, or electric bills climbing in July and August, your ductwork is the likely culprit. Call (661) 523-0295 and we’ll schedule an honest assessment.
Why Hollis Air Duct Santa Clarita Is Santa Clarita’s Preferred Duct Sealing Company
Hollis Air Duct Santa Clarita operates under The Garrison Standard, which means written prices, written guarantees, and a 365-Day Done Right Promise on every duct sealing job. Our technicians arrive in uniform, background-checked, and inside the window we quoted. They follow The Garrison Code: price it before we touch it, do it by the book, leave the site clean. No exceptions, no moving targets.
We know this valley’s housing stock from firsthand experience. The master-planned neighborhoods of Valencia, Canyon Country, Saugus, and Newhall were built fast during the 1980s and 1990s, and that pace shows inside the ductwork. Our team regularly pulls drywall dust, sawdust, and framing debris from systems that a builder sealed up decades ago and never reopened. We also work throughout Santa Clarita and the surrounding foothill communities, so we know how the terrain and wind affect airflow and indoor dust.
The 365-Day Done Right Promise is the part that matters most to Santa Clarita homeowners who have been burned before. If a sealed joint fails within a year, we return and fix it at no charge. That includes the second visit. It is not a negotiation. It is in writing on every invoice.
Styles & brands we work with
Duct Sealing Services in Santa Clarita
Duct Sealing Services in Santa Clarita means finding every leak in your supply and return ductwork, then sealing those leaks with mastic, foil tape rated for HVAC use, or an aerosol sealant like Aeroseal. In a valley where summer temperatures routinely pass 100 degrees, a 20% duct leak means 20% of the air you paid to cool is going into your attic. We measure leakage before and after with a calibrated duct blaster so you can see the number change, not just take our word for it.
Pressure Testing and Leak Location
Before we apply anything, we measure your system’s total leakage and find where air is escaping. The usual suspects in Santa Clarita homes are register boots, plenum connections, and joints in flex duct that have pulled apart over time. A pressure test tells us whether sealing alone will solve the problem or whether there is a kinked or collapsed run hiding behind drywall that needs a camera inspection first.
Aerosol Sealing for Hard-to-Reach Ducts
Some leaks are behind walls or buried in insulation where a technician cannot physically reach them. For those, we use aerosolized sealant that travels through the duct system under pressure and seals gaps from the inside. It works well on the long flex runs common in Canyon Country and Stevenson Ranch homes where ducts sag between trusses and separate at the joints.
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.
Duct Insulation in Santa Clarita
Duct Insulation in Santa Clarita is not optional if your ducts run through an unconditioned attic. Attic temperatures here routinely hit 130 to 150 degrees in July and August. Uninsulated or poorly insulated ducts lose cooling capacity fast, and the air coming out of your registers can gain 10 to 15 degrees between the air handler and the room. That means longer run times, higher bills, and rooms that never quite reach the thermostat setting.
Attic Duct Wrap and Replacement
We replace torn fiberglass wrap and install new insulation on exposed metal ducts in attics and crawlspaces. For flex duct that has baked and cracked in the heat, we replace the run entirely and seal the new connections properly. The goal is to keep the air you already paid to condition at the temperature it was when it left the unit.
Sealing and Insulating Together
Sealing without insulating still wastes energy. Insulating without sealing lets dirty attic air into the airstream. On most Santa Clarita jobs, the two go together: seal the leaks, then insulate the ductwork so the system works as one unit. We quote the combined job as one written price before any work starts.
Trusted Brands We Service in Santa Clarita
We service and seal ductwork on systems from every major manufacturer found in Santa Clarita homes, and our equipment roster includes professional-grade tools from Nikro, Honeywell, and Aprilaire. That matters because a well-sealed duct system only works as well as the filtration catching what still gets through. We stock common replacement parts locally so a sealing job in Valencia, Newhall, or Saugus does not stall waiting on a shipment. If your system needs a filter upgrade or a media cabinet as part of the job, we will show you the written option, not spring it on you at the door.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Santa Clarita Homes
- Construction debris sealed inside new-build ducts. Builders in the 1980s and 1990s boom sealed systems before final cleanup, trapping drywall dust, sawdust, and even food wrappers inside. We remove that debris before sealing so you are not locking decades of dust into place.
- Gaps at register boots and plenum connections. These joints loosen as a home settles and as flex duct expands in attic heat. Air leaks into the attic and pulls dusty air into the system on the return side.
- Sagging flex duct between trusses. The valley’s hot attic temperatures soften the plastic liner, and flex runs stretch and sag. Joints separate under their own weight, and desert dust bypasses the filter entirely.
- Kinked or collapsed runs hidden behind drywall. A duct blaster test shows the leak, but a camera inspection shows the kink. Sealing does not fix a collapsed duct. We check first so we do not sell you a fix that will not hold.
Pricing for Duct Sealing in Santa Clarita, CA
A typical whole-system Duct Sealing job in Santa Clarita runs $450 – $1,200. Smaller jobs focused on the accessible attic runs and register boots land in the $450 – $700 range. Homes with significant debris removal, multiple collapsed runs, or full duct replacement in crawlspaces can reach $1,200 to $2,500. The price is written before we start and does not move. We do not charge per vent, and we do not quote a teaser number that balloons once the technician is inside. Call (661) 523-0295 for a free estimate and we will give you a firm number.
We Also Serve Cities Near Santa Clarita
Our crews work throughout the Santa Clarita Valley and the surrounding foothill communities, including Stevenson Ranch, Castaic, Sylmar, and San Fernando. If you live in one of those areas, the same written-price standard and 365-Day Done Right Promise apply. Call us at (661) 523-0295 and we will tell you exactly when we can be there.
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.
FAQs About Duct Sealing in Santa Clarita
Newly built homes in Santa Clarita often need duct sealing within the first five to ten years because builders frequently sealed the system before final construction cleanup, trapping drywall dust, sawdust, and debris inside the ducts where it abrades joints and collects at register boots. The gaps at plenum connections and boots also loosen quickly as the house settles and attic heat cycles the materials. A pressure test will show whether your new home’s ducts are leaking more than they should. If it does, call (661) 523-0295 and we can test and seal in one visit.
Yes, duct sealing reduces wildfire smoke intrusion by closing the return-side leaks that pull smoky attic air and soot into your airstream when the system runs. Homes in Canyon Country, Saugus, and Newhall sit close enough to the Angeles National Forest that smoke season is a regular event, and a leaky return duct pulls that smoke right past your filter. Sealing the joints and adding a high-efficiency media filter from Aprilaire or Honeywell gives you two layers of protection. We can quote both together as one written price.
Yes, the age of your ductwork changes the approach. Homes built in the 1980s and 1990s in Valencia and Canyon Country often have original flex duct that is brittle, sagging, or already collapsed, in which case sealing leaks on old material is a temporary fix and replacement is the honest recommendation. Homes built after 2005 typically have ductwork in better structural condition, so a targeted seal with mastic and aeroseal works well. We camera-inspect before we seal on any home older than about 15 years so you are not paying for a fix that will not last. Call (661) 523-0295 and we will tell you what condition your ducts are in before we recommend anything.
The NADCA standard for duct sealing requires the technician to follow the National Air Duct Cleaners Association’s procedural guidelines for source removal, containment, and sealing materials, and our Santa Clarita crews follow that standard on every job. That means negative pressure containment during debris removal, HEPA filtration to keep the dust we extract from re-entering your home, and sealing materials rated for HVAC use rather than generic tape. The 365-Day Done Right Promise covers the work in writing, so if a joint we sealed opens up within a year, we return at no charge.
Construction debris leaks typically show up as heavy dust accumulation at register boots and around return grilles within the first few years of living in the home, often with visible drywall dust or sawdust in the first foot of duct when you remove a register. Normal wear leaks develop more gradually and usually appear as rooms that slowly stop holding temperature, higher summer bills, and dust that seems to come from everywhere. In both cases, a $450 – $1,200 sealing job typically solves the problem, but if we find debris inside, we remove it before sealing. We sealed a Valencia home where the original 1994 flex duct had leaked at every joint and the air handler was pulling attic dust into the supply side. Negative pressure and HEPA filtration during source removal bagged two full canisters of drywall dust and a McDonald’s wrapper left from construction, then mastic and Aeroseal brought duct leakage down to 3%. The homeowner’s allergies cleared within a week and the blower motor stopped short-cycling. Call (661) 523-0295 for a free estimate, and we will give you a written price before any work starts.
Written by Roy Castellanos, Owner at Hollis Air Duct Santa Clarita, serving Santa Clarita and the surrounding valley communities.