Stop paying to condition your attic or crawl space. LC Heating & Air provides professional duct sealing to ensure your HVAC system delivers air where it belongs—inside your living space.
Duct Cleaning & Air Duct Service in Chatsworth
LC Heating & Air provides duct cleaning in Chatsworth — 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 Chatsworth, 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. When I walk into a home in Chatsworth, I often see the same issue: a perfectly good furnace or AC unit working hard, but the rooms still aren't comfortable. Most of the time, the problem isn't the equipment itself; it's the ductwork. If your ducts are leaking, you are essentially paying to air condition your attic or crawl space instead of your living room.
Duct sealing is one of the most practical ways to improve your home's efficiency. Whether we are using manual mastic sealing for accessible joints or the Aeroseal process for hidden leaks, we focus on getting the air to the rooms that need it. We don't believe in selling you things you don't need, but we do believe in making sure your system actually works the way it was designed to.
Call LC Heating & Air at (323) 970-3113 for scheduling and estimates.
Local HVAC considerations
Why Chatsworth Homes Need Duct Attention
Chatsworth has a mix of housing styles, from older single-family homes to various remodels. Many of these properties have duct systems that have never been inspected or sealed. In our climate, where we deal with significant heat and dust, those leaks do more than just waste energy—they pull dust and debris from your attic into your living space, which affects your indoor air quality.
When I inspect a system, I look for crushed flex ducts, disconnected joints, and poorly sealed plenums. If your HVAC system runs constantly but the temperature never seems to stabilize, or if you notice uneven comfort between rooms, it is usually a sign that your ducts are leaking conditioned air into unconditioned spaces.
Understanding Your Duct System
In many of the homes I visit, the ductwork is tucked away in attics or tight crawl spaces. Over time, the materials used to seal these ducts—like old cloth duct tape—dry out and fail. This is why we don't rely on temporary fixes. We use mastic, which is a thick, flexible sealant that stays pliable for the life of the duct system.
For systems where the leaks are distributed throughout the house in areas we can't reach by hand, we use Aeroseal. It’s a smart way to seal leaks from the inside out. We pressurize the system and inject a polymer mist that finds the holes and seals them. It’s effective, non-toxic, and it works.
Our Diagnostic Process
I don't start any work without knowing exactly what we are dealing with. We start with a duct blaster test. This allows us to quantify your leakage as a percentage of your system's total airflow. It gives us a clear baseline so you can see the difference before and after we finish.
Once we have the numbers, we look at the access points. If the leaks are at the plenum or the main trunk lines, we can seal those manually. If the leakage is deep in the walls or inaccessible attic runs, we discuss the Aeroseal option. We provide a written estimate for the work so you know exactly what you are paying for before we start.
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 ducts are physically damaged, crushed, or made of outdated materials that are falling apart, sealing might not be enough. In those cases, I will tell you that replacement is the better long-term investment.
However, if the ductwork is structurally sound but just leaky at the joints, sealing is a very cost-effective way to improve performance. My job is to give you the honest truth about your system's condition. If a repair will get you the results you need, I will recommend the repair. If the system is past its prime, I will explain why replacement makes more sense for your home.
What to Expect Regarding Costs
I believe in being transparent about costs. Duct sealing isn't a one-size-fits-all price because every home's accessibility is different. Manual sealing of accessible sections typically ranges from $400 to $1,200. For Aeroseal, which is a more involved process, you are looking at $1,500 to $3,000 for a typical single-story home.
These prices include the diagnostic testing before and after the work. When you consider the energy savings—often 15% to 25% on your HVAC energy use—the project often pays for itself in a relatively short amount of time. We provide a written estimate after our initial inspection so there are no surprises.
Common Mistakes Homeowners Make
The biggest mistake I see is people using standard silver 'duct tape' to fix leaks. That tape dries out, cracks, and falls off within a year or two. It’s a temporary fix that doesn't hold up in the heat of a Chatsworth attic.
Another mistake is ignoring the ductwork when replacing an HVAC unit. If you install a high-efficiency furnace or AC but leave the leaky, inefficient ducts in place, you aren't getting the efficiency you paid for. We always recommend testing the ducts when we look at equipment replacement to ensure the whole system is balanced.
Health and Safety Considerations
Safety is my priority. When we use Aeroseal, we use a non-toxic polymer that is safe for your home. It’s the same type of material used in chewing gum. We do recommend that you step out of the house for the 60 to 90 minutes while we are injecting the sealant, just as a precaution.
We also make sure that your system is clean before we seal it. The process includes a verification phase to ensure that the sealant is applied to the duct walls and not left floating in the air. We want your home to be comfortable and safe.
Frequently Asked Questions
Q: Does duct sealing require a permit in California? A: Standalone duct sealing generally doesn't require a permit, but if we are doing it as part of a larger HVAC replacement, the permit process will require us to perform leakage testing to meet Title 24 standards. We handle all the documentation for you.
Q: How long does the sealing process take? A: Most residential projects are completed in a single day. Manual sealing takes about 4 to 8 hours, and the Aeroseal process takes about 4 to 6 hours including setup and testing.
Q: Why is my house so dusty? A: Leaky ducts in your attic act like a vacuum, pulling dust and insulation particles into your HVAC system and blowing them into your rooms. Sealing the ducts is one of the best ways to reduce that dust accumulation.
Q: Can you seal all types of ducts? A: We can seal most standard sheet metal and flex duct systems. During our initial inspection, we will confirm if your specific ductwork is a good candidate for our sealing methods.
Scheduling and access — Duct Sealing in Chatsworth
Parking, gate codes, and attic or rooftop access in Chatsworth 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.
Next Steps for Your Home
If you are tired of high energy bills or rooms that just won't stay cool, give LC Heating & Air a call at (323) 970-3113. We are a local, CSLB-licensed contractor (#1073586) serving Chatsworth and the surrounding areas.
We don't do high-pressure sales. We come out, inspect your system, run the tests, and give you an honest assessment of what your ducts need. If you're ready to get your home's comfort back on track, let's talk.
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
- • Duct sealing: $1,000–$3,000
- • Duct repair or replacement: $500–$5,000
Useful next steps
Duct Sealing in Chatsworth at a glance
- • Duct Sealing provider: LC Heating & Air
- • Location served: Chatsworth, CA 91311
- • 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 Chatsworth
Reviewed by Leo, Owner & Lead Technician
This duct sealing guide for Chatsworth 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 Chatsworth customers say about duct sealing
Verified reviews from homeowners in Chatsworth 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.”
