Professional duct sealing stops conditioned air from leaking into your attic and walls. We use duct blaster testing to quantify leaks and provide permanent sealing solutions to lower energy bills and improve comfort in your Pacoima home.
Duct Cleaning & Air Duct Service in Pacoima
LC Heating & Air provides duct cleaning in Pacoima — 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 Pacoima, 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 Pacoima attics, and I see the same thing over and over: homeowners paying to cool their attic space instead of their living room. When your ducts leak, your HVAC system has to work twice as hard to keep your home comfortable during those 95-100 degree days we get here in the Valley.
Duct sealing is one of the most practical ways to get more out of your existing system. Whether you have an older ranch house with original ductwork or a newer remodel, sealing those leaks means your system runs less, lasts longer, and actually hits the temperature you set on your thermostat. We don't guess; we test, seal, and verify.
Call LC Heating & Air at (323) 970-3113 for scheduling and estimates.
Local HVAC considerations
Why Pacoima Homes Need Duct Sealing
In Pacoima, our climate puts serious stress on HVAC systems. With long summer run times and high attic temperatures, any air leaking out of your ducts is a major energy waste. I often find that older homes in this area have duct systems that were never properly sealed at the joints, or flex ducts that have been crushed or disconnected over time.
When conditioned air leaks into your attic or wall cavities, your system struggles to keep up. This isn't just about higher bills; it's about the extra wear and tear on your condenser and blower motor. If your system runs constantly but the house still feels uneven, it's usually a sign that your ducts are leaking air where they shouldn't be.
Understanding Your Duct System
Pacoima has a mix of housing, from mid-century ranch houses to larger, modern remodels. In these homes, the ductwork is often tucked away in attics where it’s exposed to extreme heat. If those ducts aren't sealed, you're losing efficiency every single minute the AC is on.
We look at the whole picture: the duct condition, electrical capacity, and how the air is actually moving through your home. If your ducts are leaking, you're essentially paying to air-condition your attic. We focus on identifying where those leaks are—whether it's at the plenum, the joints, or the register boots—and fixing them so the air goes where it's supposed to.
Our Diagnostic Process
We don't just look around and guess. We use a duct blaster test to quantify exactly how much air you're losing. This test gives us a baseline percentage of leakage. It's the only way to know for sure if your system is performing as it should.
After we test, we show you the numbers. If the leakage is high, we talk about the best way to seal it. Sometimes that means manual mastic sealing for accessible joints, and sometimes it means using Aeroseal to reach the parts of the system that are hidden behind walls or in tight attic spaces. We verify the results with a second test after the work is done so you know you're getting what you paid for.
Repair or Replace?
A lot of people ask me if they should just replace their whole HVAC system when they have comfort issues. The truth is, if your equipment is in decent shape but your ducts are leaking, replacing the unit won't fix the comfort problem. You'll just have a new, expensive unit pushing air into a leaky system.
If the system is worth repairing, I'll tell you. If the pattern of damage points to a system that's at the end of its life, I'll explain why replacement makes more sense. My goal is to give you a clear, honest decision so you don't spend money you don't need to.
What to Expect with Costs
Duct sealing costs vary based on the size of your home and how accessible the ducts are. Manual mastic sealing for accessible sections typically runs $400–$1,200, while Aeroseal internal sealing for a typical single-story home ranges from $1,500–$3,000. These prices include the necessary testing to verify the work.
We always provide a written estimate before we start any work. We don't do surprise fees. You'll know exactly what the job entails and what the expected outcome is before we touch your equipment.
Scheduling and Access
When we schedule a visit, we plan for the realities of Pacoima homes. We need clear access to your attic and your outdoor condenser. If your attic is tight or your ductwork is buried under insulation, we account for that in our planning.
Most residential duct sealing projects are completed in a single day. We work efficiently to minimize disruption to your home. If you have any specific concerns about access, just let us know when you call (323) 970-3113.
Common Mistakes to Avoid
The biggest mistake I see is using standard silver 'duct tape' to seal HVAC ducts. It dries out, cracks, and falls off within a few years. It's not made for the temperature swings we get in an attic. 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're putting in a new system, make sure the ducts are tested and sealed. It's the best way to ensure your new investment actually performs the way it's supposed to.
Health and Safety
Your home's indoor air quality is important. When ducts leak, they can pull in dust and debris from your attic or crawl space and blow it directly into your living area. Sealing those leaks helps keep your air cleaner.
For the Aeroseal process, we use a non-toxic, food-grade polymer. It's the same material used in chewing gum. We recommend that you step out of the house for about 60–90 minutes while we run the process, just as a precaution, but it's a safe and proven method for sealing leaks that you can't reach by hand.
Making the Right Choice for Your Home
Choosing to seal your ducts is a decision about long-term comfort and efficiency. If your energy bills are high and some rooms just never seem to get comfortable, it's time to look at the ducts. We'll come out, run the tests, and give you a straightforward answer on whether sealing will solve your problem.
At LC Heating & Air, we don't believe in high-pressure sales. We believe in doing the job right the first time. If you're in Pacoima and want an honest assessment of your HVAC system, give us a call at (323) 970-3113. We're here to help you make the right choice for your home.
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 Pacoima at a glance
- • Duct Sealing provider: LC Heating & Air
- • Location served: Pacoima, CA 91331
- • 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 Pacoima
Reviewed by Leo, Owner & Lead Technician
This duct sealing guide for Pacoima 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 Pacoima customers say about duct sealing
Verified reviews from homeowners in Pacoima 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.”
