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 Canoga Park
Duct sealing in Canoga Park typically runs $450 – $1,400 depending on how much of your system is accessible, and most jobs are finished in a single day. If you’re losing cooled air into an attic or wall cavity, the problem is not your AC unit; it’s the ductwork. We serve Canoga Park with crews that know the difference between a 1955 ranch off Sherman Way and a Warner Center condo built three years ago. Call (661) 523-0295 and you’ll get a written price before any work starts.
What makes duct sealing in this city different is the housing stock. Most Canoga Park homes went up between 1950 and 1975, which means galvanized steel ducts, asbestos tape at the seams, and slab foundations that hide runs you’ll never see without a camera. Our Duct Sealing team inspects what’s actually there before quoting anything. That way the price reflects the job, not a guess.
Why Hollis Air Duct Santa Clarita Is Canoga Park’s Preferred Duct Sealing Company
We’ve worked in enough Canoga Park homes to know the patterns: original undersized returns in the Avenues, flex duct crushed during condo remodels near Warner Center, and pitted supply runs along Topanga Canyon Boulevard where decades of heat cycling have done their work. Roy Castellanos runs our crews on The Garrison Standard: arrive inside the quoted window, price it in writing, do it by the book, leave the site clean. Every technician is background-checked and uniformed, so the person at your door is the person we said would be there.
Our Canoga Park customers call us for one main reason: a year later, the work still holds. The 365-Day Done Right Promise puts that in writing. If a sealed joint fails within a year, we return and fix it at no charge. That includes a free second visit. No hoops, no negotiation. You call (661) 523-0295, you tell us what’s happening, and we schedule the callback.
We answer phones with a live person, 24 hours a day, seven days a week. If you call at 11pm because your AC is pushing hot air and you just realized the leak is in the ducts, someone picks up. That matters in Canoga Park summers when daytime highs push past 100°F.
Styles & brands we work with
Duct Insulation in Canoga Park
Duct Insulation in Canoga Park is the difference between air leaving your handler at 55 degrees and arriving at the bedroom vent at 72. In attics that regularly exceed 140°F during a Valley summer, uninsulated or under-insulated steel ducts become radiant heaters. The blower works harder, the compressor cycles longer, and the electric bill climbs. Insulating supply and return runs is a repair with a measurable return, not an optional add-on.
What a job here involves depends on what’s already installed. In older Canoga Park ranches with original galvanized steel, we find wraps that have compressed to nothing or fallen away entirely in places. In Warner Center condos from the 80s and 90s, the issue is usually damaged flex duct that has lost its R-value. A typical single-system Duct Insulation job in Canoga Park runs $250 – $800 depending on linear footage and attic access.
When Sealing Alone Is Not Enough
Sealing closes leaks. Insulation controls temperature gain. A duct can be perfectly sealed and still bleed cold air into a 140-degree attic through the metal itself. If your ducts are accessible in an unconditioned attic, we recommend both. If the runs are in a conditioned chase or under slab, insulation is less of a factor and sealing matters more.
What We Use on Canoga Park Jobs
We carry fiberglass wraps and reflective barriers rated for Southern California attics. For homes near the orange groves west of Topanga Canyon Boulevard where dust is finer, we pair insulation with an exterior jacket that resists the accumulation that breaks down exposed material over time.
HVAC Duct Sealing in Canoga Park
HVAC Duct Sealing in Canoga Park is a structural repair, not a patch job. In the 1950s – 70s Avenues tracts, the steel ductwork installed when the homes were built sits under slab foundations or in tight attic spaces. Asbestos tape at the seams has been drying out for fifty to seventy years. When it cracks, conditioned air pours into the ground or the insulation. Sealing that properly requires encapsulating the old material and sealing over it with mastic, not peeling it off and releasing fibers into the air.
A full HVAC Duct Sealing job on a single family home in Canoga Park runs $450 – $1,400. The spread comes down to access: a ranch with open attic trusses costs less than a two-story split level where half the runs are enclosed. We walk the system first and give you a written number. It does not move at the door.
A Sealing Job We Did Near Warner Center
On a Warner Center-adjacent condo street, our techs camera-inspected a flex duct run that had been crushed during a remodel and was leaking conditioned air into a wall chase. We used negative pressure with HEPA filtration to capture disturbed dust, then sealed the supply and return ducts with mastic and reinforced the connections before rebalancing the air handler. The homeowner had been running the AC at full tilt and feeling almost nothing in the second bedroom. The problem was never the unit.
Trusted Brands We Service in Canoga Park
We stock parts and materials for the systems we see most often in Canoga Park: Aprilaire filtration housings, Rotobrush rotary brush system tools for source removal, and Abatement Technologies negative-air machines when dust control matters. We also service and seal around Guardsman filtration products in homes where air quality is a priority, especially after Santa Ana winds push wildfire smoke through the pass. Having the right parts on the truck means we can complete a typical sealing job in one visit rather than leaving you waiting on a supplier.
Common Duct Sealing Problems We See in Canoga Park Homes
- Cracked asbestos tape on original galvanized ducts. Homes built in the 1950s and 1960s across the Avenues used white asbestos tape at every seam. It dries, cracks, and separates over time. The correct fix is encapsulation and sealing over it, never removal, which creates a fiber-release hazard.
- Disconnected flex duct under negative pressure. Undersized returns in 1960s ranch homes force blower motors to work harder. That creates negative pressure that can pull flex duct connections apart. We see disconnected takeoffs in attics off Victory Boulevard and Gault Street regularly.
- Crushed flex runs from remodels and storage. Warner Center condos and townhomes often have flex duct routed through tight chases. Remodels, cable pulls, and even attic storage can crush a run flat. Sealing cannot fix a crushed duct; it needs replacement before any sealing product goes on.
- Smoke and construction dust undermining sealant. Santa Ana wind-blown wildfire smoke coats duct interiors with fine particulate. If that layer is not source-removed first, new sealant cannot bond. The same is true in neighborhoods near active apartment construction, where valley fever spores and dust infiltrate returns.
See the difference
Before
After
Before
After
Before
AfterPricing for Duct Sealing in Canoga Park, CA
Duct sealing in Canoga Park runs $450 – $1,400 for a single system, depending on the number of accessible runs and the condition of the existing connections. Duct insulation adds $250 – $800 on top if your attic runs are exposed to extreme heat. Source removal before sealing, which includes negative-pressure dust control, adds $200 – $400 when the ducts are coated with construction dust or smoke particulate.
What drives the price in Canoga Park specifically is slab work. If your 1950s ranch has under-slab ducts that need sealing from the inside, the job requires more time and a camera pass to map the runs. That’s the honest reason a sealing quote here can be higher than a city with attic-only systems. Call (661) 523-0295 for a free estimate and a written number before any work begins.
We Also Serve Cities Near Canoga Park
Our crews cover Canoga Park and the surrounding West Valley, including Reseda, Northridge, Chatsworth, and Porter Ranch. If you are just outside our Canoga Park service area, call (661) 523-0295 and we’ll confirm whether we can get a technician to you inside the window.
Serving Canoga Park, CA - Our Local Coverage Area
We’re based in the Canoga 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 Canoga Park
That smell is usually drawing air from a place you cannot see: a crawlspace, a wall cavity, or an attic with years of accumulated dust. In 1960s Canoga Park ranches, disconnected or cracked seams in return ducts pull unconditioned air into the system. Sealing the returns and supplies stops that draw. The fix is part of a standard duct sealing job, and in our experience the smell fades within a day or two once the system is tight. Call (661) 523-0295 to have us camera-check your returns.
It likely is, if your home was built before the late 1970s. The white cloth-like tape used on galvanized ducts in that era commonly contained asbestos. We do not remove it. Our process is to encapsulate the tape and seal over it with mastic, which is the EPA-recommended approach for intact material in good condition. If the tape is heavily degraded, we’ll bring in a licensed abatement contractor before sealing begins. The key is never peeling at it yourself. Call (661) 523-0295 and we’ll assess it properly.
In many Warner Center condos, yes. We have camera-inspected flex duct runs in these buildings and found crushed or disconnected sections leaking conditioned air into wall chases. When air never reaches the register, the thermostat never satisfies and the system never shuts down. Sealing the supply runs and reinforcing the connections often brings room temperatures down noticeably. If your HOA or building maintenance has not inspected the ducts recently, call (661) 523-0295 and we can do a camera pass before quoting.
If the dust is entering through your HVAC system, sealing the return and supply runs will reduce it significantly. But the ducts themselves need to be source-removed first. Fine dust from construction near Topanga Canyon Boulevard or Warner Center coats the interior surfaces, and sealant will not bond to a dusty duct. We use negative pressure with HEPA filtration during removal to keep the dust from spreading, then seal the runs. The order matters. Call (661) 523-0295 for an assessment.
Under-slab ducts in 1950s Canoga Park homes are typically sealed from the inside, using an access point at the supply register or a cleanout. We run a camera through the duct to find the failing sections, then use a specialized sealant applied through the existing openings. In cases where the slab duct has collapsed, sealing will not fix it and the practical repair is rerouting the run through an attic or soffit. If you suspect a collapsed run, call (661) 523-0295 and we’ll camera the system before recommending anything.
Get Your Canoga Park Duct Sealing Estimate
If your AC is working harder than it should and you suspect the ducts, call (661) 523-0295. We will send a background-checked, uniformed technician to Canoga Park, walk the system with you, and put the price in writing before any work starts. Every job is covered by the 365-Day Done Right Promise, and if a sealed joint fails within the year, we come back at no charge. That’s The Garrison Standard, and it applies to every job we do in Canoga Park.
Written by Roy Castellanos, owner of Hollis Air Duct Santa Clarita. Roy leads the crews that serve Canoga Park and has been with the Garrison Partners family since 2004.