LC Heating & Air provides expert duct sealing services to help Calabasas homeowners stop energy waste, improve room-by-room comfort, and ensure their HVAC system is running efficiently.
Duct Cleaning & Air Duct Service in Calabasas
LC Heating & Air provides duct cleaning in Calabasas — 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 Calabasas, 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, the owner of LC Heating & Air. I've spent enough time in Calabasas attics and crawl spaces to know that the biggest enemy of your comfort isn't always the HVAC unit itself—it's the ductwork. If your system is working hard but your home still has hot or cold spots, or if your energy bills seem higher than they should be, the problem is often conditioned air leaking into your attic or wall cavities instead of reaching your living room.
At LC Heating & Air, we don't believe in guessing. We use duct blaster testing to quantify exactly how much air you're losing. Whether we use manual mastic sealing for accessible joints or the Aeroseal process for hidden leaks, our goal is to get your system sealed tight so you stop paying to heat or cool your attic.
Call LC Heating & Air at (323) 970-3113 for scheduling and estimates.
Local HVAC considerations
Why Calabasas Homes Need Duct Attention
Calabasas presents unique challenges for HVAC systems. Between the hillside terrain, varying sun exposure, and the way homes are tucked into canyons, your system is already working against the elements. When you add leaky ducts to the mix, the system can't keep up. In many of our local estate lots and custom homes, we find that ductwork was installed with long runs that are prone to sagging or crushing, especially in tight-access mechanical areas.
When conditioned air leaks into these unconditioned spaces, your HVAC system has to run longer cycles to reach the thermostat setpoint. This isn't just a comfort issue; it's a mechanical strain that shortens the life of your equipment. If you notice dust accumulating near your registers or your system runs constantly without making the house feel right, it's time to look at the ducts.
Understanding Your Home's Ductwork
Calabasas has a wide mix of housing, from older custom builds to newer estates. Older homes often rely on original sheet metal or aging flex duct that has simply degraded over time. The joints dry out, the tape fails, and the connections become loose. In newer homes, we sometimes find that the duct design wasn't properly balanced for the home's specific layout or sun exposure.
Because of the hillside nature of many Calabasas properties, access is often the biggest hurdle. We have to plan our work around narrow roads and difficult attic or crawl space access. We take the time to inspect the entire run—not just the parts you can see—to ensure we aren't just patching a symptom while ignoring a larger structural issue with the ductwork.
Our Diagnostic Approach
We don't start by selling you a service; we start by measuring the problem. We perform a duct blaster test to quantify your leakage as a percentage of total system airflow. This gives us a baseline. If your system is leaking 20% or more, you're losing a significant portion of the air you're paying to condition.
Once we have the numbers, we look at the physical condition of the ducts. We check for crushed flex, disconnected joints, and poor plenum seals. We then recommend the right fix: manual mastic sealing for accessible joints, or Aeroseal for those hidden leaks that are impossible to reach by hand. After we finish, we re-run the test to prove the improvement.
Repair or Replace?
This is the most common question I get at the kitchen table. If your ducts are in decent structural shape but just leaking at the joints, sealing is almost always the right move. It’s cost-effective and provides immediate comfort improvements.
However, if the ductwork is undersized for the equipment, severely crushed, or made of materials that are falling apart, sealing won't solve the airflow problem. In those cases, we will be honest with you: patching a failing system is a waste of your money. We will show you the diagnostic data so you can make an informed decision on whether a repair will hold or if a full duct replacement is the only way to get the performance you need.
What to Expect Regarding Costs
We believe in transparency. Duct sealing costs vary based on the size of your home and the accessibility of the ductwork. Manual mastic sealing typically ranges from $400 to $1,200, while Aeroseal internal sealing for a typical single-story home ranges from $1,500 to $3,000. These prices include the pre- and post-testing required to verify the results.
When you look at the cost, think about the long-term energy savings. Sealing 20–30% duct leakage can reduce your HVAC energy use by 15–25%. In a climate like ours, that adds up quickly. We provide a written estimate after our initial diagnostic so you know exactly what you're paying for before we start.
Mistakes We See Often
The biggest mistake I see is homeowners using standard silver 'duct tape' to fix leaks. That tape dries out and fails within a few years, leaving you right back where you started. We use professional-grade mastic, which stays flexible and lasts for the life of the duct system.
Another mistake is ignoring the ductwork when replacing an HVAC unit. If you install a high-efficiency furnace or AC but keep your leaky, restrictive ducts, you aren't getting the efficiency you paid for. We always recommend testing the ducts during any major HVAC project to ensure the whole system works together.
Safety and Indoor Air Quality
Your health is our priority. The Aeroseal process uses a non-toxic vinyl acetate polymer—the same material found in chewing gum—to seal leaks from the inside. It’s completely safe for your home. During the process, we monitor the system to ensure the sealant is applied correctly and stays where it belongs.
We also focus on the cleanliness of your air. By sealing leaks, we prevent your system from pulling in dust, insulation fibers, and debris from your attic or crawl space. This means cleaner air circulating through your home and less dust settling on your furniture.
Scheduling and access — Duct Sealing in Calabasas
Parking, gate codes, and attic or rooftop access in Calabasas are confirmed when you book duct sealing service so the crew arrives with the right ladders and PPE.
Same-week appointments are common; emergency calls are answered within 30 minutes by phone.
Is Duct Sealing Right for You?
Duct sealing is a smart move if your energy bills are high, your home has uneven temperatures, or you notice dust buildup near your vents. It’s one of the most effective ways to improve your home's energy efficiency without replacing your entire HVAC system.
If you're unsure, the best first step is a diagnostic test. We'll measure your leakage and show you the numbers. If the data shows significant loss, we'll walk you through your options—whether that's manual sealing or Aeroseal—so you can make the decision that makes the most sense for your home and your budget.
How the visit works
We perform a duct blaster test to quantify existing leakage as a percentage of system airflow.
Based on leakage quantity, duct type, and accessibility, we recommend manual sealing, Aeroseal, or a combination.
We apply mastic to all accessible joints and plenums, or set up and run the Aeroseal process for internal sealing.
We re-run the duct blaster test and provide you with before/after leakage numbers as written documentation.
Cost factors we review before quoting
- • Duct inspection: $125–$200
- • Duct cleaning (whole house): $400–$900
- • Manual mastic sealing: $400–$1,200
- • Aeroseal internal sealing: $1,500–$3,000
Useful next steps
Duct Sealing in Calabasas at a glance
- • Duct Sealing provider: LC Heating & Air
- • Location served: Calabasas, CA 91302
- • 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 sealing process in Calabasas
Reviewed by Leo, Owner & Lead Technician
This duct sealing guide for Calabasas 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 Calabasas customers say about duct sealing
Verified reviews from homeowners in Calabasas and nearby neighborhoods who used our duct sealing 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.”
