Air Duct Repair in North Hollywood - Leakage Measured, Then Priced in Writing

Trusted Air Duct Repair for North Hollywood Homeowners

Air duct repair in North Hollywood is the difference between an HVAC system that leaks money through torn seams and disconnected joints, and one that moves air where it belongs. Onyx Duct Cleaning has provided ductwork repair to homes across North Hollywood since 2013, led by Stan Merrick, a specialist who treats compromised ductwork as a contamination and efficiency problem rather than a cosmetic issue. Most North Hollywood homes were built between the 1940s and 1970s, which means much of the ductwork predates modern sealing standards. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. Call (833) 589-9715 for a free estimate on any duct repair, replacement, or installation.

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HVAC Duct Installation

HVAC Duct Installation is the process of sizing, routing, and installing new ductwork that connects your furnace or air handler to the supply registers and return grilles throughout the home. You need it when the existing ducts are crushed, rusted through, or so poorly designed that balancing airflow becomes impossible. We install duct runs sized to your system’s actual CFM output using contractor-grade equipment, including Abatement Technologies filtration units that keep construction dust and debris contained during the job. A typical HVAC duct installation in North Hollywood runs $2,800 – $6,500 depending on the number of runs, accessibility through attics and crawl spaces, and whether the old ducting must be removed first.

Trunk, Branch, and Return Sizing

Most older San Fernando Valley homes have undersized returns, which starves the blower and shortens its life. We measure static pressure and calculate the return air requirement before installing anything, so the new system actually performs as designed.

Sealed at Every Joint

Duct leakage percentages in this area routinely exceed 20% on original construction. Every joint gets mastic-sealed and tested with a duct leakage measurement, not just taped and left to dry out in the Valley heat.

Air Duct Replacement

Air Duct Replacement means removing sections of existing ductwork that are beyond repair and installing new, correctly sized duct in its place. You need it when ducts show rust perforation from years of condensation cycles, when rodents have chewed through flex duct in the crawl space, or when years of poor filtration have packed the interior with debris that contaminates every cycle. Onyx Duct Cleaning handles the full replacement with the same Rotobrush contact-cleaning and Nikro HEPA vacuum platforms we use in restoration work, then verifies airflow at each register. Most air duct replacement in North Hollywood falls between $1,800 and $4,200 depending on linear footage and attic access.

Whole-Home vs. Partial Replacement

Sometimes only one trunk line or a few branch runs are compromised, and replacing everything would be wasteful. We inspect the entire system, camera what we can, and replace only what’s failing, which keeps the cost honest.

Flex vs. Solid Metal

North Hollywood attics run hot, and cheap flex duct sags and collapses in that heat. We replace collapsed runs with properly rated flex or rigid metal, depending on the route and the system’s static pressure capacity.

Ductwork Repair

Ductwork Repair is the targeted fix for specific points of failure: disconnected joints, crushed sections, torn flexible connectors, and leaking seams that push conditioned air into the attic instead of your living room. You need it when rooms run noticeably hotter or colder than the rest of the house, when dusty air blows from registers even after cleaning, or when utility bills climb without a change in usage. We identify the failure point with visual inspection and pressure testing, then repair it with mastic, metal tape rated for HVAC, or replacement sections as needed. A typical ductwork repair job in North Hollywood runs $350 – $1,500 depending on the number of failure points and whether the duct is accessible from the attic, crawl space, or through a drywall opening.

Duct Sealing

Leaky joints are the most common duct failure in this region, and mastic remains the only sealant that holds over decades of thermal cycling. We apply it at every accessible seam on the repaired run, then verify with a pressure reading before we call the job done.

Crush and Disconnect Repairs

Storage in the attic or a crawl space shift can crush a flex run or separate a metal joint. We reconnect, clear the obstruction, and support the repaired section with proper hanging material so it does not sag back into a failure point.

Duct Replacement

Duct Replacement differs from repair in scale: when multiple sections have failed or the original duct was installed incorrectly, replacing the entire run or system is the only fix that holds. You need it when you see rust-through on multiple metal sections, when flex duct has become brittle and split in several places, or when previous repairs have multiplied to the point where the duct resembles a patchwork. Onyx Duct Cleaning assesses whether your ducting is worth saving, then replaces what cannot be salvaged using the same Nikro HEPA containment methods we bring to restoration projects. Most full duct replacement in North Hollywood runs $2,500 – $5,500 for a typical single-family home, depending on the number of supply runs and return paths.

When Repair Is Not Enough

A rusted-through duct cannot be taped back together, and a crushed trunk line cannot be resealed. We tell you straight when replacement is the only option, and we show you the damage before we quote the work.

Right-Sizing the New Duct

Replacing duct with the same size often repeats the original mistake. We check the blower’s output and the room-by-room load, then size the new runs accordingly, which is why our replacements outperform the original installation.

Ductwork Installation

Ductwork Installation is the ground-up construction of a duct system, usually for a new addition, a new HVAC system, or a home that never had proper ducting installed in the first place. You need it when you are adding square footage that the existing ductwork cannot serve, converting an unconditioned space, or replacing an antiquated radiant-heat system with forced air. We design the layout around the equipment’s actual output, not a rule of thumb, and install it with the same containment standards we bring to duct repair. Typical ductwork installation in North Hollywood costs $3,000 – $7,000 depending on the home’s square footage, number of registers, and whether the runs go through attic, crawl space, or both.

New Additions and ADUs

North Hollywood has seen a steady wave of ADU construction, and those new units need properly sized duct systems of their own. We install compact systems that deliver balanced air without choking the existing HVAC or the new unit.

Retrofit Installations

Older homes that were never built for forced air need careful routing to avoid structural compromises. We plan every run to minimize framing penetrations and preserve the home’s character while delivering the airflow the new system requires.

Brands We Service

We work on duct systems connected to all major HVAC equipment brands, and we understand how each one interacts with the air distribution side. Honeywell whole-house filtration systems require ducting that can handle the added static pressure, and we check that before recommending any repair approach. Aprilaire humidifiers and media filters likewise depend on properly sealed ducts to deliver the performance they are rated for, so we inspect the entire pathway, not just the visible equipment.

Our experience with Rotobrush and Nikro equipment means we clean and repair ductwork according to restoration-grade standards, and our familiarity with Guardsman products keeps us current on the coatings and sealants used in professional duct installations. Whether you have any of these brands or any other make connected to your duct system, we can help.

Signs You Need a Pro Right Now

• Rooms that never reach temperature. If one bedroom runs ten degrees warmer than the rest of the house no matter how you adjust the thermostat, the problem is almost always airflow, not the furnace. A disconnected or crushed run is starving that room, and a pro can find it fast.
• Dust blowing from registers days after cleaning. Clean registers that still blow visible dust mean the ducts themselves are pulling debris from the attic or crawl space. That is a leakage point, not a filter problem, and it needs repair, not another cleaning cycle.
• A spike in the utility bill with no change in usage. Duct leaks make your system run longer to hit the same setpoint because conditioned air is going into the attic instead of the house. The leak is costing you money every single cycle.
• Visible duct damage in the attic or crawl space. Crushed flex, hanging sections, or rust on metal duct is visible evidence that the system is failing. If you can see it without tools, it has already been failing for a while and should not wait.
• Whistling or rattling from the vents. A whistling register usually means a return is undersized or a duct joint has opened and is pulling air through a gap. The noise is the system telling you something is wrong before it fails completely.

Our Process, Step by Step

1. 1
   Walkthrough and symptom interview. We start by asking where the problems show up: which rooms are hot, which registers blow weak, where the noises come from. Your answers tell us where to look first, and we listen before we inspect.
2. 2
   Visual and pressure inspection. We inspect every accessible section of ductwork, and we run pressure diagnostics to quantify leakage. This is the same approach restoration contractors use, and it tells us exactly where the failures are, not just that they exist.
3. 3
   Straightforward findings and a fixed quote. We show you what we found and explain what it means for your system. The quote is one flat price per system, agreed before work starts, with no per-vent pricing and no surprise add-ons when the van is in your driveway.
4. 4
   Contained repair or replacement. We bring the right equipment for the job, including containment and filtration when the work will disturb debris. The repair area is treated like a contamination zone because, in a duct system, it is one.
5. 5
   Verification and before-and-after review. We test the system again after the work is done and show you the before-and-after results. You see the system we fixed, not just the invoice we leave behind.

How Much Does Air Duct Repair Cost in North Hollywood?

Our Service Area Near North Hollywood

We serve homes throughout the eastern San Fernando Valley, including NoHo Arts District, Toluca Lake, Valley Glen, Van Nuys, Sherman Oaks, Burbank, and Glendale. For duct repair customers farther out in Woodland Hills, Calabasas, and Pasadena, we schedule service calls with the same dispatch window. Most North Hollywood area calls get a technician dispatched the same day or next day, Sunday through Friday from 7am to 7pm. Call (833) 589-9715 and we will confirm the soonest available opening for your neighborhood.

Frequently Asked Questions About Air Duct Repair in North Hollywood

Schedule Your Air Duct Repair Service in North Hollywood Today

If your ducts are leaking, crushed, or disconnected, every day they stay that way costs you comfort and utility dollars. Call (833) 589-9715 for a free, no-obligation estimate on any duct repair, replacement, or installation in North Hollywood. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. One flat price per system, agreed before work starts.

Written by Stan Merrick, Owner at Onyx Duct Cleaning, serving North Hollywood since 2013.