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.
Rotobrush Duct Sealing & Repair: The Ventura Owner’s Guide
If you own a Rotobrush system and the sealing collar, hose coupling, or repair sleeve has split, we stock Rotobrush-compatible duct sealing and repair components and install them across Ventura. You’ll typically pay $245 to $540 installed, depending on which component failed and whether we’re repairing a single coupling or re-sealing a full trunk line. We carry the common wear items on the truck, so most Ventura calls are one visit.
Most owners discover a failed seal the same way: a whistling sound at a duct joint, a sudden dust bloom around a register, or a drop in airflow to one room. The Rotobrush sealing system is built tighter than standard foil tape jobs, so when a seam lets go, it tends to announce itself. You’ll usually see a gap at the collar where the flex run meets the rigid trunk line, or a hardening, cracked gasket on an older application.
Which Rotobrush Models This Applies To
Most Rotobrush duct sealing and repair components we handle fit the AiR+ and RotoStorm series, along with the older Rotobrush 1 and Rotobrush 2 platforms still running in plenty of Ventura County attics. The compatibility gotcha we see most often: the sealing collars and repair sleeves for the AiR+ line are sized for 6-inch, 8-inch, and 10-inch flex connections, and the RotoStorm fleet equipment uses a larger-diameter industrial coupling that will not swap over. If your equipment label is worn off, measure the inside diameter of the failed collar before calling us. That one measurement usually settles the model question in thirty seconds.
On the OEM-versus-aftermarket question: Rotobrush genuine components are consistent, but they’re not always in stock locally, and lead times to Ventura can run a week or more during peak season. Quality aftermarket equivalents from manufacturers like Thermaflex and Duro Dyne machine into the same dimensions and hold up comparably in our experience. We’ll tell you what’s available at the time of the call and quote both options honestly.
Styles & brands we work with
Signs Your Rotobrush Duct Sealing & Repair Is Failing
- Whistling or hissing at a register. Air is escaping where the flex duct meets the trunk line. The Rotobrush collar gasket has likely dried, split, or pulled away from the duct. Under pressure, the gap vibrates and you hear it.
- A room that never quite reaches temperature. If one bedroom in Ventura runs five degrees warmer than the hallway in August, you may be losing conditioned air through a failed seal before it even leaves the trunk. The room isn’t the problem. The connection is.
- Dust accumulating around one specific register. A broken seal lets attic air get pulled into the duct stream. That’s not household dust settling. That’s what’s inside your attic coming through the vent.
- Visible gaps or sagging flex at the collar. In older Ventura homes near Midtown, original duct runs from the seventies often sag at connection points. The weight pulls the seal apart over years, and the gap only widens with every heating and cooling cycle.
- Higher utility bills with no other explanation. A torn duct seal can bleed 20 to 30 percent of your conditioned air into the attic. Your system runs longer to compensate. The bill climbs and the seal keeps failing.
See the difference
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After
Before
After
Before
AfterReplacement Cost & What’s Included
Here’s what Rotobrush duct sealing and repair typically costs in Ventura, installed:
- Single collar or coupling replacement: $245 to $310, including the part, labor, and re-taping of the connection
- Sealing repair sleeve (per joint): $185 to $270, including surface prep and mastic application where needed
- Full trunk line re-seal (up to 8 connections): $420 to $540, including all materials and a written guarantee
The range depends on access. A crawl space in an older Ventura bungalow costs more in labor than an open attic with standing room. Every quote includes one flat price in writing before we start, and every repair carries a 365-Day Done Right Promise. If the seal fails within the year, we come back at no charge and make it right.
DIY or Call Us?
There’s nothing inherently dangerous about duct sealing work, but that’s not the same as saying it’s easy to do correctly. You can safely inspect your accessible duct runs: look at the collars, feel for gaps, and check whether flex duct has pulled away from the trunk line. What most DIY attempts miss is proper surface preparation. A new seal applied over old tape adhesive and loose fiberglass will fail in months. We also find plenty of homeowners who re-seal a connection without first checking the static pressure in the system. If the pressure is off, the new seal fails the same way the old one did.
If you want a look at the connection before you make a decision, we’ll diagnose it on site and show you exactly what we’re seeing. Tell me what you’re seeing and I’ll tell you exactly what it costs to fix it. Call (559) 315-0418 and ask for Marcus.
FAQs
A properly installed Rotobrush-compatible duct seal on a correctly pressurized system lasts 10 to 15 years in Ventura’s climate. Coastal humidity and the temperature swings between Midtown’s foggy mornings and August afternoons accelerate gasket drying, so we see failures earlier in systems with undersized returns or collapsed flex runs. If your house has original seventies ductwork, expect to inspect connections every three to five years.
Yes, if the collar or sleeve is intact and the failure is at the tape or mastic layer, we can usually prep and re-seal the connection for about $185 to $270. If the component itself has split or the gasket has hardened and crumbled, replacement is the honest fix. Repairing a cracked Rotobrush sealing collar with more mastic just delays the same failure by a few months. Call (559) 315-0418 and we’ll tell you which category yours falls into.
A single collar replacement takes 45 to 90 minutes. A full trunk line re-seal runs two to four hours depending on access and how many connections we’re doing. We’ll give you a time window when you call before the visit, and the tech will walk you through what was found and what was replaced.
We stock the common Rotobrush-compatible collars, couplings, and repair sleeves on the truck in the sizes most Ventura systems use. We also carry parts support for Lennox, Trane, and Carrier systems on the same service call. If your component needs to be ordered, we’ll tell you the lead time and get you on the schedule with a written price before anything ships. Reach us at (559) 315-0418 for a free estimate.
Written by Marcus Veale, Owner, Linden Air Duct Ventura at Linden Air Duct Ventura, serving Ventura and nearby areas.