LC Heating & Air provides professional duct sealing services to help Hidden Hills homeowners stop energy loss, balance room temperatures, and maximize HVAC efficiency.
Duct Cleaning & Air Duct Service in Hidden Hills
LC Heating & Air provides duct cleaning in Hidden 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 Hidden 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 Hidden Hills working on the unique hillside and custom estate homes that define this area. One of the most common issues I see isn't the furnace or the AC unit itself, but the ductwork that carries the air. 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 leaking ducts.
Duct sealing is one of the most effective ways to improve home comfort and lower utility costs. When conditioned air leaks into your attic, crawl spaces, or wall cavities, you're paying to heat or cool spaces you don't occupy. At LC Heating & Air, we use professional diagnostic tools to measure your leakage and provide a permanent, long-term solution to get your system running the way it was designed to.
Call LC Heating & Air at (323) 970-3113 for scheduling and estimates.
Local HVAC considerations
Why Hidden Hills Homes Need Duct Sealing
Hidden Hills homes often feature complex layouts, hillside foundations, and custom architectural designs. These factors can lead to long duct runs and mechanical areas that are difficult to access. When ducts are installed in these tight spaces, they are prone to disconnection, crushing, or simple degradation over time. Because of the local climate, which involves significant sun exposure and elevation changes, even small leaks in your ductwork can create noticeable room-by-room comfort differences.
In many of the older custom homes I visit, the original ductwork has never been properly sealed. Conditioned air is often lost before it ever reaches your living room or bedroom. By sealing these leaks, we ensure that the air your HVAC system works to condition actually reaches the rooms where you spend your time.
Understanding Your Ductwork
Whether your home has traditional sheet metal ducts or modern flexible ducting, the joints and connections are the most common failure points. In Hidden Hills, where homes are often built on slopes, the structural movement of the house can sometimes stress duct connections, leading to gaps that grow over time.
We don't just guess where the leaks are. We use a duct blaster test to quantify exactly how much air you are losing. This gives us a baseline so we can show you the difference before and after our work. It’s about being honest and practical—if your ducts are in good shape, I’ll tell you. If they are leaking enough to impact your comfort and your wallet, we’ll show you the data.
Our Diagnostic and Sealing Process
We approach every project with a clear, four-step process. First, we perform a pre-sealing duct leakage test to measure the exact percentage of airflow loss. Second, we evaluate the accessibility of your ductwork to choose the right sealing method—either manual mastic sealing for accessible joints or Aeroseal for internal, hard-to-reach leaks.
Third, we perform the sealing work. Mastic is a durable, flexible sealant that stays pliable for the life of the duct system. For internal leaks, we use the Aeroseal process, which injects a polymer mist that seals leaks from the inside out. Finally, we perform a post-sealing verification test to confirm the results and provide you with the documentation you need.
Repair or Replace?
A common question I get is whether it's worth sealing old ducts or if they should just be replaced. If your ductwork is structurally sound but just has leaky joints, sealing is almost always the better, more cost-effective choice. It provides a permanent fix that can last for the life of the system.
However, if the ducts are crushed, collapsed, or made of outdated materials that are falling apart, sealing won't solve the underlying problem. In those cases, I’ll be upfront with you about the need for replacement. We focus on what makes sense for your home and your budget, not on pushing unnecessary equipment.
Investment and Value
Duct sealing is one of the highest-ROI improvements you can make. By sealing 20–30% duct leakage, you can typically reduce your HVAC energy use by 15–25%. At current electricity rates, the energy savings often pay for the service in under two years.
Our pricing is transparent. Manual mastic sealing typically ranges from $400 to $1,200, while Aeroseal internal sealing ranges from $1,500 to $3,000 for a typical home. We provide a written estimate after our initial diagnostic so you know exactly what to expect before we start.
Logistics in Hidden Hills
Working in Hidden Hills requires planning. Between the gated access, the steep slopes, and the narrow roads, we make sure our team is prepared for the specific access requirements of your property. We coordinate with you to ensure our equipment can be safely staged and that we have the necessary clearances to work on your mechanical systems.
We respect your time and your property. Most residential duct sealing projects are completed in a single day, and we always leave the workspace clean. If you have specific access concerns, just let us know when you call (323) 970-3113.
Avoid These Common Mistakes
The biggest mistake I see is the use of standard 'duct tape'—the silver cloth tape you buy at the hardware store. It dries out, cracks, and fails within a few years. We only use professional-grade mastic and foil-backed HVAC tape that is designed to last.
Another mistake is ignoring duct leakage during an HVAC replacement. If you install a high-efficiency furnace or AC unit but connect it to a leaky duct system, you are essentially throwing away the efficiency you just paid for. Always test your ducts when you upgrade your equipment.
Safety First
Your health and safety are our priority. The materials we use, including the Aeroseal polymer, are non-toxic and safe for your home. Aeroseal is the same material used in chewing gum and is tested for indoor air quality. We also ensure that all our work complies with California Title 24 standards, providing you with the necessary documentation for your records.
When we work in your home, we follow strict safety protocols, including ensuring proper ventilation and testing the system before and after the process to ensure everything is running correctly.
Is Duct Sealing Right for You?
If your home feels uneven, your energy bills are high, or you notice dust buildup around your registers, it’s time to look at your ducts. We don't believe in high-pressure sales. We believe in showing you the facts, explaining the condition of your system, and giving you an honest recommendation.
If the system is worth repairing, we will tell you. If the pattern points to replacement, we will explain why. Give LC Heating & Air a call at (323) 970-3113 to schedule a diagnostic. We’ll come out, inspect your system, and give you a written estimate that makes sense.
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
- • Total square footage of the duct system
- • Accessibility of ductwork (attic, crawl space, or wall cavities)
- • Current leakage rate measured by duct blaster test
- • Choice of sealing method (Manual Mastic vs. Aeroseal)
Useful next steps
Duct Sealing in Hidden Hills at a glance
- • Duct Sealing provider: LC Heating & Air
- • Location served: Hidden Hills, 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 Hidden Hills
Reviewed by Leo, Owner & Lead Technician
This duct sealing guide for Hidden 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 Hidden Hills customers say about duct sealing
Verified reviews from homeowners in Hidden Hills 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.”
