Fix leaky and damaged ducts — better comfort, lower energy bills.
Duct Cleaning & Air Duct Service in Granada Hills
LC Heating & Air provides duct cleaning in Granada Hills — including air duct cleaning, duct repair service, duct sealing, HVAC ductwork. Whether you need same-day service, a written estimate, or help deciding between repair and replacement, our licensed technicians handle every make and model.
We repair and service all major HVAC brands in Granada Hills, including Carrier, Trane, and Goodman, and older or discontinued units. No matter the manufacturer, we diagnose the problem accurately and give you an upfront price before any work begins.
I'm Leo, owner of LC Heating & Air. I spend a lot of time in Granada Hills attics, and I can tell you that most homeowners have no idea their ducts are leaking. Because these systems are hidden in attics and wall cavities, you don't see the problem—you just feel it. You feel it when one bedroom is always ten degrees hotter than the living room, or when your energy bill spikes even though your AC seems to be running fine.
The Department of Energy estimates that typical residential duct systems lose 20–30% of conditioned air through leaks before it ever reaches your living space. In our climate, where the AC works hard from May through October, that means you are paying to cool your attic instead of your home. Duct repair is often the most effective way to solve uneven temperatures and reduce the strain on your equipment.
Call LC Heating & Air at (323) 970-3113 for scheduling and estimates.
Local HVAC considerations
Common Duct Issues in Granada Hills
Granada Hills has a mix of hillside homes and custom properties where the attic access and mechanical layouts can be tricky. I frequently see flex duct that has been crushed by foot traffic during attic maintenance or insulation work. When that inner liner is pinched or torn, the airflow to your rooms drops significantly.
I also deal with disconnected joints and take-offs. Over time, the original tape or mastic dries out and fails, especially in the heat of a San Fernando Valley summer. When a duct disconnects at the plenum, you’re losing a massive amount of air right at the source. We also see issues with return ducts drawing in hot, dusty attic air, which not only ruins your indoor air quality but forces your system to work much harder to reach the thermostat setpoint.
Why Your Home's Layout Matters
In Granada Hills, factors like sun exposure, slope, and elevation changes create unique comfort challenges. A room on the south side of a hillside home might get significantly more heat gain than a room on the north side. If your duct system wasn't designed to handle those specific load differences, or if the ducts are leaking, you’ll never get the balance right.
We look at the whole picture—register placement, duct sizing, and how the air is actually moving through your specific floor plan. It’s not just about patching a hole; it’s about making sure the air is getting to the rooms that need it most.
Our Diagnostic Process
I don't believe in guessing. When I come out to your home, we start with a proper diagnostic. We measure airflow at your registers to see what’s actually coming out, and we perform a duct pressurization test (often called a duct blaster test). This tells us exactly how much air is leaking out of the system.
Once we have the data, I’ll show you what we found. We’ll look at the accessible sections, check for crushed runs, and identify where the mastic has failed. You’ll get a written estimate for the repair before we start any work, so you know exactly what you’re paying for and what the expected result will be.
Repair vs. Replacement: A Practical View
A lot of companies will push for a full duct replacement the moment they see a leak. That’s not always the right move. If your existing ductwork is sized correctly and the material is in good shape, a professional repair—sealing the joints, fixing the tears, and reconnecting the runs—is often all you need to get your system back to peak performance.
However, if the ducts are undersized, made of outdated materials that are falling apart, or if the layout is fundamentally flawed, I’ll tell you. If the system is worth repairing, we will fix it. If the pattern points to a larger issue that will just lead to more repairs down the road, we will explain why replacement might be the better long-term investment.
Understanding the Costs
Duct repair costs vary based on the accessibility of your attic and the extent of the damage. Targeted repairs for a disconnected section might be straightforward, while a full system sealing project takes more time and materials. We use high-quality mastic and proper sealing techniques that last.
For systems with widespread leaks that are hard to reach, we offer Aeroseal. This is an internal sealing process that we inject into the ducts to seal leaks from the inside out. It’s highly effective for those tricky areas where we can't physically reach with our hands. We’ll discuss which method is most cost-effective for your specific home during our visit.
Working in Granada Hills
I know that Granada Hills has its own set of challenges, from narrow streets to steep driveways. When we schedule your service, we plan for the logistics. We make sure we have the right equipment for your property type, whether that means navigating a tight attic crawl space or working around hillside access points.
We respect your time and your home. We show up when we say we will, and we leave the workspace clean. Because we are a local contractor, we aren't rushing to get to the next job across the county. We take the time to do the job right.
Common Mistakes to Avoid
The biggest mistake I see is homeowners trying to patch ducts with standard duct tape. It doesn't work. The heat in an attic will cause the adhesive to fail in a matter of weeks, and you'll be right back where you started. You need professional-grade mastic or foil tape applied to clean, prepared surfaces.
Another mistake is ignoring the return side of the system. People focus on the supply registers because that's where the air comes out, but if your return ducts are leaking, you’re pulling in dust and attic air, which can clog your filter and damage your blower motor. We check both sides of the system to ensure the whole loop is tight.
Health and Safety
Your duct system is the lungs of your home. If your ducts are leaking in the attic, they are pulling in insulation fibers, dust, and whatever else is up there and blowing it directly into your living room. Sealing your ducts isn't just about efficiency; it’s about the air you and your family are breathing every day.
We take safety seriously. We ensure that all repairs are done to code, and we verify that the system is operating safely after we finish. If we find issues that could impact your indoor air quality, we’ll point them out and show you how to fix them.
Is It Time to Call?
If you notice weak airflow, high energy bills, or rooms that just won't stay comfortable, it’s worth having a professional look at your ducts. You don't need to guess if you have a problem. We can perform a quick diagnostic to show you exactly what’s happening in your system.
Give LC Heating & Air a call at (323) 970-3113. We’re local, we’re licensed (CSLB #1073586), and we’re here to help you get your home’s comfort back on track with honest, practical advice.
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 linear footage of ducting requiring repair
- • Type of duct material (flex vs. sheet metal)
- • Severity of leaks and need for specialized solutions like Aeroseal
- • Number of disconnected joints or crushed sections
Useful next steps
Duct Repair in Granada Hills at a glance
- • Duct Repair provider: LC Heating & Air
- • Location served: Granada Hills, CA 91344
- • License: CSLB C-20 #1073586
- • Phone: (323) 970-3113
- • Estimate: written estimate before approved work
- • Emergency calls answered within 30 minutes (24/7)
Our duct repair process in Granada Hills
Reviewed by Leo, Owner & Lead Technician
This duct repair guide for Granada Hills 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 Granada Hills customers say about duct repair
Verified reviews from homeowners in Granada Hills and nearby neighborhoods who used our duct repair service.
“Our AC stopped working during a heat wave and LC had a technician here within two hours. He diagnosed a bad capacitor, had the part on his truck, and fixed it on the spot. Fair price, no upsell. Will use again.”
“Called on a Saturday because AC was blowing warm air. LC answered, sent someone the same afternoon. They found and fixed a refrigerant leak. Professional and reasonably priced.”
“Woke up to no AC at 6am. LC was at my door by 9am. Frozen evaporator coil — they explained exactly why it happened (dirty filter + low airflow) and fixed it same visit. Very professional.”
