Leaky ducts are the silent culprit behind high energy bills and uneven cooling in East Hollywood homes. We provide professional duct diagnostics, manual repairs, and Aeroseal sealing to restore your system's efficiency.
I’m Leo, owner of LC Heating & Air. I spend a lot of time in East Hollywood attics, and I can tell you that most homeowners have no idea their ductwork is leaking. Because these systems are hidden behind walls and up in the rafters, you don't see the damage—you just feel the result: a room that never gets cool, a high electric bill, or a house that feels dusty no matter how much you clean.
My approach is simple: we don't guess. We use duct pressurization testing to quantify exactly how much air you are losing. If your ducts are worth repairing, we’ll fix them. If the system is too far gone, I’ll tell you that too. We provide written estimates and clear explanations so you can make an informed decision for your home.
Local HVAC considerations
East Hollywood (90027)
CSLB #1073586
Airflow, leakage, and attic heat gain
Common Duct Issues in East Hollywood
East Hollywood has a mix of housing stock, from older single-family homes to small multifamily buildings and remodels. We frequently see flex duct that has been crushed by foot traffic in tight attics, disconnected joints at the plenum, and leaky boots where the duct meets the ceiling register. In our climate, these leaks aren't just losing air; they are pulling in hot, dusty attic air, which forces your AC to work harder and longer just to maintain a basic setpoint.
We also see issues with older sheet metal ductwork that has lost its seal over time. When we perform a diagnostic, we look for these specific patterns: weak airflow in bedrooms, whistling sounds near registers, and uneven temperatures between rooms. These aren't just minor inconveniences; they are signs that your HVAC system is fighting against its own distribution network.
Why Your Home's Age Matters
Whether you live in a classic bungalow or a recent remodel, the age of your HVAC system and the layout of your ducts play a huge role in how we approach repairs. In older homes, we often find ductwork that was undersized for modern high-efficiency equipment. In remodels, we sometimes find ducts that were moved or extended without proper airflow calculations, leading to 'dead zones' in the house.
Before we recommend any repair, we check the electrical, the duct condition, and the equipment placement. If your ducts are in good shape but just disconnected, a simple repair is usually the right call. If the ductwork is falling apart or undersized, we’ll discuss whether a targeted repair will actually solve your comfort issues or if it’s just a temporary fix.
Our Diagnostic Process
We don't just look at the equipment; we look at the whole system. We start by measuring airflow at your registers to see what’s actually reaching your living space. Then, we perform a duct pressurization test (duct blaster test) to quantify exactly how much leakage exists. This gives us a baseline number.
Once we have the data, we inspect the accessible sections of your ductwork. We look for torn inner liners, failed mastic, and disconnected runs. After we finish our repairs, we re-test the system. You get the peace of mind knowing the work actually improved your system's performance, backed by measurable data.
Repair vs. Replace: Making the Right Call
I’m often asked if it’s better to patch a leak or replace the whole duct run. My answer depends on the condition of the materials. If the flex duct is intact but has a loose connection, we fix the connection. If the duct is brittle, torn, or undersized, patching it is often a waste of your money.
If the system is worth repairing, we will tell you. If the pattern points to replacement, we will explain why. We want you to have a system that fits your property, not a generic recommendation that doesn't solve your comfort problems.
Understanding Costs
Duct repair costs vary based on accessibility and the extent of the damage. A simple inspection starts between $125 and $200. Targeted repairs for specific leaks usually range from $200 to $600. For more comprehensive sealing, such as using Aeroseal for hard-to-reach leaks, costs can range from $1,500 to $3,000.
We always provide a written estimate before we start. We don't believe in surprises. By sealing your ducts, you can often reduce your HVAC energy consumption by 15–25%, which helps the repair pay for itself over time through lower monthly utility bills.
Air Quality and Safety
Leaky ducts are a major source of poor indoor air quality. When your return ducts leak in a hot, dusty attic, they pull insulation fibers, dust, and potential mold spores directly into your air stream. This is then blown into your living areas.
Sealing these leaks doesn't just improve your comfort—it keeps your home cleaner. We take safety seriously, ensuring that all repairs are done to code and that your system is operating as it was designed to, without introducing contaminants into your home.
Mistakes to Avoid
The biggest mistake I see is homeowners trying to fix ducts with standard duct tape. It doesn't hold up in the heat of an attic. It dries out, cracks, and falls off within a season. We use professional-grade mastic and foil tape designed for HVAC systems.
Another mistake is assuming that all airflow problems are caused by the AC unit itself. Sometimes the unit is perfectly fine, but the ducts are so leaky that the air never makes it to the room. Always get a professional diagnostic before assuming you need a new air conditioner.
Scheduling Your Service
We are a local contractor serving East Hollywood and the surrounding areas. Because we are based nearby, we can often coordinate inspections around your schedule. When you call (323) 970-3113, you're talking to a team that understands the local housing stock.
We check access, electrical, and duct condition before we start any work. If you're ready to get your system running the way it should, reach out to us. We’ll come out, perform a thorough diagnostic, and give you a clear, honest plan.
Is Duct Repair Right for You?
If you notice rooms that are always too hot or too cold, or if your energy bills seem high for the size of your home, it’s time to look at your ducts. Duct repair is one of the most effective ways to improve comfort and efficiency without replacing your entire HVAC system.
If you are ready to stop paying to cool your attic, give LC Heating & Air a call. We’ll provide a professional assessment, a written estimate, and the honest advice you need to make the right decision for your home.
How the visit works
We measure airflow at registers, inspect accessible ductwork, and perform duct pressurization testing to quantify leakage.
We identify the specific leaks and damage and present a repair scope with written pricing before any work begins.
We access damaged sections and seal with mastic, reconnect disconnected flex duct, and repair torn inner liners.
We re-test duct leakage after repair and measure airflow at registers to confirm improvement.
Cost factors we review before quoting
- • Accessibility of ductwork in attics or crawl spaces
- • Total amount of leakage measured during testing
- • Type of repair required (manual sealing vs. Aeroseal)
- • Condition of existing duct materials
Useful next steps
Our duct repair process in East Hollywood
Reviewed by Leo, Owner & Lead Technician
This duct repair guide for East Hollywood is reviewed for practical HVAC accuracy by Leo at LC Heating & Air. LC Heating & Air holds California CSLB C-20 HVAC license #1073586 and provides written estimates before approved work.
What East Hollywood customers say about duct repair
Verified reviews from homeowners in East Hollywood and nearby neighborhoods who used our duct repair service.
“Had LC install a Daikin mini split in our 1940s bungalow that never had AC. The work was clean, the unit is incredibly quiet, and our bedroom finally stays cool in summer. Highly recommend.”
“We converted our garage into an ADU and needed HVAC. LC installed a Mitsubishi single-zone mini split — permits, electrical, everything. The unit is so quiet you can barely hear it running. Our tenant loves it.”
“Got a 3-zone Daikin system for our craftsman home — bedrooms upstairs, living room downstairs. Each room has its own temperature control and the monthly electric bill is actually lower than our old window units combined.”
