Whole-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.
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After
Before
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Before
AfterFast, Reliable Duct Sealing Across Oak Park
Duct sealing in Oak Park, CA typically runs $800 – $2,400 for a whole-home system depending on accessibility and the condition of the existing ductwork, and most jobs are scheduled within a few days of your call. If you’re tired of dust puffing from your vents, rooms that never reach the thermostat setting, or utility bills that climb every summer, your ductwork is probably leaking conditioned air into your attic or crawlspace.
We serve Oak Park from our Los Angeles office, with crews that know the area’s unincorporated roads and the specific challenges of its 1960s-to-1990s housing stock. Whether you’re off Kanan Road, near Oak Park High School, or back in the hillside tracts off Lindero Canyon, we arrive inside the quoted window and price the job in writing before we touch anything. Call (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Oak Park’s Preferred Duct Sealing Company
Oak Park is a small, tight community, and word travels fast here. We’ve built our reputation by showing up when we said we would, wearing uniforms, and leaving the site clean. Our Duct Sealing in Oak Park work is backed by the 365-Day Done Right Promise – if the seal fails or the leak returns within a year, we come back and make it right at no charge, including a free second visit.
Our technicians are background-checked and trained on The Garrison Code, which means they explain what they found, show you photos if you want them, and write the price down before any work starts. No estimates that balloon once we’re inside. No per-vent pricing games. One flat price per system, agreed on beforehand.
Phones are answered by a live person 24 hours a day, 7 days a week. If you’re calling after a Santa Ana wind event has blown ash through your system, you’ll reach someone who can schedule you, not a voicemail loop.
Duct Sealing Services in Oak Park
Duct Sealing Services in Oak Park address the leaks, gaps, and disconnected joints that waste conditioned air and pull contaminants into your HVAC system. Because Oak Park sits unincorporated between the Conejo Valley and the Santa Monica Mountains, fall Santa Ana wind events push fine wildfire ash and soot into return ducts and air handlers here – a seasonal loading pattern that repeats nearly every fall and does not show up the same way in neighboring Thousand Oaks or Agoura Hills. Sealing the return side of your system, not just the supply runs, is critical to stopping this.
Our Duct Sealing team uses mastic sealant and reinforced mesh for permanent joints, plus aerosol-based duct sealing for hard-to-reach runs where manual access is limited. We pressure-test before and after to prove the improvement. A typical whole-home duct sealing job in Oak Park runs $800 – $2,400, with most single-story tract homes falling in the $1,100 – $1,800 range.
Supply Duct Sealing
Supply ducts carry cooled or heated air to your rooms. In Oak Park’s original 1960s – 1990s tract homes, flex duct in attics often pulls apart at joints or develops pinhole leaks where it contacts framing. We seal these with mastic and mesh, or replace damaged sections if the flex has degraded beyond repair.
Return Duct Sealing
Return ducts draw air back to the air handler. This is where Oak Park homes see the most ash and dust intrusion after wildfire season. We inspect the full return path, seal gaps at the air handler cabinet, and verify that no attic air is being pulled around filter racks or through degraded flex connections.
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 Oak Park
Duct Insulation in Oak Park protects your sealed ductwork from the temperature extremes in attics and crawlspaces, and it prevents condensation that can degrade the seal over time. Oak Park’s semi-arid Mediterranean climate means brutally hot attic summers – often 120°F or more – and mild, occasionally rainy winters where crawlspace moisture can be an issue. Uninsulated or poorly insulated ducts lose 20 – 30% of their thermal energy before the air ever reaches your rooms.
We install new duct insulation using professional-grade materials from Guardsman and Abatement Technologies, sized to the R-value appropriate for California Title 24 requirements. Typical duct insulation work in Oak Park runs $600 – $1,800 depending on linear footage and whether we’re re-insulating existing sealed ducts or wrapping new replacements. Most jobs pair naturally with sealing work.
Attic Duct Insulation
Attic runs in Oak Park’s older tract homes often sit in unconditioned space with thin, crumbling original insulation. We remove degraded material, verify the seal underneath, and install new wrapped insulation with proper vapor barriers.
Crawlspace Duct Insulation
Crawlspace ducts in hillside Oak Park properties near the Santa Monica Mountains foothills can suffer from rodent damage and moisture exposure. We inspect for intrusion, replace chewed or water-damaged sections, and insulate with materials rated for below-grade use.
Trusted Brands We Service in Oak Park
We carry equipment and materials from Rotobrush, Nikro, Abatement Technologies, and Guardsman – the same professional-grade tools commercial crews use, not hardware-store gear. For Oak Park customers, this means we stock common duct diameters, mastic compounds, and insulation wraps locally, so we’re not ordering parts and making you wait. Our negative-air machines from Nikro and rotary brush systems from Rotobrush let us clean thoroughly before we seal, which is essential on homes that haven’t been serviced in decades. If your system uses Honeywell or Aprilaire filtration components, we can integrate those into the sealing plan so everything works together.
Common Duct Sealing Problems We See in Oak Park Homes
- Original flex duct pulling apart at joints. The 1970s and 1980s tract homes near Oak Park High School often have flex duct that has sagged, kinked, or separated at connection points. We find this in maybe half the older homes we inspect. The gaps pull in attic dust and, after Santa Ana events, fine wildfire ash that coats the blower motor.
- Return ducts drawing unfiltered attic air. When filter racks don’t seal properly or return plenums have gaps, the system bypasses your filter entirely. In Oak Park, this means Conejo Valley pollen and post-fire ash go straight into your air handler and back out through the supply vents.
- Rodent-damaged insulation creating secondary leaks. Older crawlspaces and attics in Oak Park’s hillside tracts often show signs of rodent activity. Chewed insulation exposes the duct underneath, and the nesting material blocks airflow. Sealing alone won’t fix this – the damaged section has to be replaced first.
- Sealing only the supply side and ignoring returns. Some crews do this to save time. It leaves the system still drawing contaminated air from the attic or crawlspace. We seal both sides and pressure-test to prove it.
Pricing for Duct Sealing in Oak Park, CA
Honest pricing means no teaser coupons and no per-vent gimmicks. Here’s what duct sealing actually costs in Oak Park:
| Service | Typical Range |
|---|---|
| Whole-home duct sealing (single-story, accessible attic) | $1,100 – $1,800 |
| Whole-home duct sealing (two-story or limited access) | $1,600 – $2,400 |
| Partial sealing (specific problem zones only) | $800 – $1,400 |
| Duct insulation (re-wrap after sealing) | $600 – $1,800 |
| Combined sealing + insulation package | $1,800 – $3,600 |
What moves the price: accessibility (tight attics take longer), the condition of existing ductwork (replacement costs more than sealing), and whether we need to address rodent damage or water degradation first. We inspect, photograph what we find, and write one flat price before any work starts. Estimates are free. Call (361) 326-5060.
We Also Serve Cities Near Oak Park
Our crews work throughout Ventura County and the western San Fernando Valley. We also provide duct sealing in Westlake Village, Thousand Oaks, Agoura Hills, and Simi Valley. Each area has its own housing stock and climate patterns, but the standard stays the same: written price, written guarantee, work done by the book.
Serving Oak Park, CA - Our Local Coverage Area
We’re based in the Oak 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 Oak Park
Every 2 to 3 years for properties near unpaved roads or open land, and always after a significant wildfire event. The dust loading from Kanan Road and surrounding rural routes is heavier than in fully paved subdivisions, and the Santa Ana ash pattern adds a seasonal layer that suburban homes don’t see. Call (361) 326-5060 to schedule an inspection and we’ll tell you where your system stands.
Yes, they can create negative pressure that pulls air through any duct leaks, which is why sealing the return side matters so much here. If your wood stove or fireplace is drawing make-up air, it’s also drawing whatever is in your attic or crawlspace through leaky ductwork. We check for this interaction during our inspection. Call (361) 326-5060 for a free estimate.
Because your return ducts are likely pulling smoky attic air around the filter and through gaps in the ductwork. After the 2018 Woolsey Fire and subsequent Santa Ana events, we’ve found this in dozens of Oak Park homes. Sealing the return path and verifying the air handler cabinet is tight stops the odor. Call (361) 326-5060 and we’ll find the entry point.
Yes, we seal ductwork in detached garages, guest houses, and workshop systems throughout Oak Park’s semi-rural properties. These runs are often longer, more exposed, and less maintained than the main house ductwork, so they leak more and cost more to condition. We price them as separate systems. Call (361) 326-5060 for an exact quote.
It reduces the dust that originates inside your duct system, which is significant. Sealing won’t stop dust from entering through doors and windows, but it will stop your HVAC system from circulating attic debris, ash, and rodent droppings that have accumulated in leaky ducts over decades. Most Oak Park customers notice cleaner registers within a week. Call (361) 326-5060 to see what your system is pulling in.
Our tech was called to a 1970s single-family tract home near Oak Park High School where the original flex duct runs in the attic had pulled apart at several joints; a camera inspection showed fine ash and dry dust coating the inside of the return ducts, and the blower motor was caked. We used negative pressure with HEPA filtration, ran agitation tools through the supply and return ducts, sealed the leaking joints with mastic and mesh, and wrapped the runs with new duct insulation – airflow at the registers came back strong and the customer stopped seeing dust puff off the vents every time the air handler kicked on.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Oak Park and Ventura County since 2004.