LC Heating & Air provides professional duct sealing to stop energy loss and improve comfort in Arlington Heights homes. We use duct blaster testing to identify leaks and apply permanent sealing solutions.
Duct Cleaning & Air Duct Service in Arlington Heights
LC Heating & Air provides duct cleaning in Arlington Heights — 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 Arlington Heights, 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 Arlington Heights looking at systems that just aren't performing right. Often, the problem isn't the furnace or the AC unit itself—it's the ductwork. If your ducts are leaking, you are paying to cool or heat your attic, crawl spaces, or wall cavities instead of your living room. It is a waste of money and puts unnecessary strain on your equipment.
At LC Heating & Air, we don't guess. We use duct blaster testing to measure exactly how much air you are losing. Whether your home is an older single-family house or a newer remodel, we look at the whole system to see if sealing will solve your comfort issues or if there is a deeper structural problem. We provide honest, written estimates and clear explanations so you can make the right decision for your home.
Call LC Heating & Air at (323) 970-3113 for scheduling and estimates.
Local HVAC considerations
Arlington Heights (90018) and surrounding neighborhoods
CSLB #1073586 (C-20 HVAC)
(323) 970-3113
Why Duct Sealing Matters in Arlington Heights
In Arlington Heights, we deal with a mix of housing stock, from older homes with original sheet metal to newer remodels with flex duct. A common pattern I see is high energy bills despite a system that seems to be running fine. When conditioned air leaks out of the ducts, the system has to run longer and harder to reach the thermostat setpoint. This is especially common in homes where ducts are routed through unconditioned attics or garages.
Dust is another tell-tale sign. If you notice unusual dust accumulation near your supply registers or around duct seams, that is often a sign that your ducts are pulling in air from dirty attics or wall cavities. Sealing those leaks doesn't just save energy; it keeps your indoor air cleaner and helps your HVAC system last longer by reducing the total runtime.
Understanding Your Home's Ductwork
Every home in Arlington Heights is different. Older homes often have leaky sheet metal joints that have dried out over decades. Newer remodels might have flex duct that has been crushed or kinked during construction, restricting airflow. Before we recommend any sealing, we check the duct condition, insulation, and airflow.
If your ducts are in good shape but just leaking at the joints, manual mastic sealing is usually the right path. If the leaks are distributed throughout the system in hard-to-reach places, we might recommend Aeroseal. We look at the whole picture—electrical, duct condition, and equipment placement—before we ever suggest a repair or replacement.
Our Diagnostic Process
We start with a duct blaster test. This is the only way to quantify exactly how much air is escaping. We seal off the registers and pressurize the system to see where the air is leaking. This test gives us a baseline number.
After we perform the sealing—whether it's manual mastic or Aeroseal—we run the duct blaster test again. We provide you with the before and after numbers so you can see the difference for yourself. We believe in showing our work, not just telling you it's done.
Repair or Replace?
A lot of homeowners ask me if they should just replace their ducts entirely. Sometimes, that is the right answer if the ducts are falling apart, heavily contaminated, or undersized for the equipment. However, many systems just need a good, professional seal.
If the system is worth repairing, I will tell you. If the pattern points to replacement, I will explain why. We don't push for replacement unless it's the only way to get your system to perform safely and efficiently. Our goal is to give you a system that fits your property, not a generic, expensive upsell.
Cost and Value
Duct sealing is one of the highest-ROI home energy improvements. Sealing 20–30% duct leakage typically reduces HVAC energy use by 15–25%. At current LA electricity rates, the payback is often under two years.
Our pricing is straightforward. Manual mastic sealing typically ranges from $400 to $1,200, while Aeroseal internal sealing ranges from $1,500 to $3,000. We provide a written estimate after our diagnostic so you know exactly what you are paying for before we start.
Scheduling Your Service
We know your time is valuable. Most residential duct sealing projects in Arlington Heights are completed in a single day. Whether we are using mastic or the Aeroseal process, we coordinate with you to ensure minimal disruption to your home.
We check access, electrical, and airflow before we schedule the work. This prevents surprises on the day of the job. If you have any specific concerns about access to your attic or crawl space, let us know during the initial call so we can plan accordingly.
Common Mistakes to Avoid
The biggest mistake I see is using standard silver 'duct tape' to seal HVAC systems. It dries out, cracks, and fails within a few years. We use professional-grade mastic that stays flexible and lasts for the life of the duct system.
Another mistake is skipping the testing phase. If you have an HVAC replacement done without a permit or without duct leakage testing, you might be paying for a high-efficiency unit that is losing all its benefits through leaky ducts. Always ask for the duct blaster test results.
Health and Safety
Your family's safety is our priority. Aeroseal uses a non-toxic polymer that is safe for indoor air quality. We recommend vacating the home for about 60–90 minutes during the injection process as a precaution, but you can return as soon as it's finished.
We also ensure that our work complies with California Title 24 standards. This isn't just about passing an inspection; it's about ensuring your system is safe, efficient, and providing the comfort you expect in your home.
Making the Right Choice for Your Home
Choosing to seal your ducts is a practical decision. If your home is uncomfortable, your bills are high, or you are planning an HVAC replacement, it is worth having us out to take a look. We will perform a diagnostic, show you the leakage numbers, and give you a written estimate.
If you are ready to stop wasting money on conditioned air that never reaches your rooms, call LC Heating & Air at (323) 970-3113. We are a local, licensed contractor (CSLB #1073586) and we are happy to help you figure out the best path forward for your specific 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
- • Total square footage of the home
- • Accessibility of ductwork in attics or crawl spaces
- • Current condition of the duct material
- • Choice between manual mastic sealing and Aeroseal internal sealing
Useful next steps
Duct Sealing in Arlington Heights at a glance
- • Duct Sealing provider: LC Heating & Air
- • Location served: Arlington Heights, CA 90018
- • 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 Arlington Heights
Reviewed by Leo, Owner & Lead Technician
This duct sealing guide for Arlington Heights 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 Arlington Heights customers say about duct sealing
Verified reviews from homeowners in Arlington Heights and nearby neighborhoods who used our duct sealing service.
“Had LC install a Daikin mini split in our 1940s bungalow that never had AC. The work was clean, the unit is incredibly quiet, and our bedroom finally stays cool in summer. Highly recommend.”
“We converted our garage into an ADU and needed HVAC. LC installed a Mitsubishi single-zone mini split — permits, electrical, everything. The unit is so quiet you can barely hear it running. Our tenant loves it.”
“Got a 3-zone Daikin system for our craftsman home — bedrooms upstairs, living room downstairs. Each room has its own temperature control and the monthly electric bill is actually lower than our old window units combined.”
