LC Heating & Air provides expert duct sealing services in Santa Monica. We use duct blaster testing to identify leaks and apply permanent solutions like mastic or Aeroseal to stop energy loss and improve your home's comfort.
Duct Cleaning & Air Duct Service in Santa Monica
LC Heating & Air provides duct cleaning in Santa Monica — 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 Santa Monica, 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 Santa Monica homes, and I see the same issue over and over: homeowners are paying to heat or cool their attic, crawl spaces, or wall cavities instead of their living rooms. When your ductwork leaks, your HVAC system has to work twice as hard to reach the temperature you set on the thermostat.
Duct sealing isn't just about saving on utility bills; it's about making sure the air you pay to condition actually makes it into your home. Whether you have an older beach property or a renovated home with modern equipment, if your ducts haven't been tested, you're likely losing 20% to 30% of your airflow. We use professional diagnostic testing to find those leaks and seal them for good.
Call LC Heating & Air at (323) 970-3113 for scheduling and estimates.
Local HVAC considerations
Why Santa Monica Homes Need Duct Attention
In Santa Monica, our marine-layer humidity and salt-air exposure can take a toll on HVAC components. Beyond the equipment itself, the ductwork in many of our coastal homes suffers from moisture-related degradation. When ducts leak in these damp conditions, it doesn't just waste energy; it can pull dust and humidity from unconditioned spaces directly into your living areas.
I often find that older flex ducts in Santa Monica homes have been crushed or torn during past renovations, or that sheet metal joints have simply dried out over time. If your HVAC system runs constantly but the temperature never quite feels right, or if you notice dust building up around your registers, your ducts are likely the culprit. We focus on return sizing, insulation, and register balance to ensure your system is actually doing its job.
Addressing Santa Monica's Unique Housing Stock
Santa Monica has a mix of everything from historic beach cottages to modern, high-efficiency condos. Each requires a different approach to ductwork. In older homes, we often find original ductwork that was never properly sealed, while in newer renovations, we sometimes find that high-efficiency equipment was installed without addressing the existing, leaky duct system.
My job is to look at your specific home and tell you what's actually going on. If your system is worth repairing, we will tell you. If the pattern of leaks points to a need for replacement, we will explain why. We don't believe in one-size-fits-all solutions; we look at your attic heat gain, your duct routing, and your current comfort levels to provide a plan that makes sense.
Our Diagnostic Process
We don't guess. Before we touch a single joint, we perform a duct blaster test. This allows us to quantify your existing leakage as a percentage of your system's total airflow. It gives us a baseline so we can show you exactly how much air you're losing.
Once we have the data, we decide on the best approach. We might use manual mastic sealing for accessible joints and plenums, or we might recommend Aeroseal for leaks that are hidden inside walls or inaccessible attic runs. After we finish, we re-run the test to verify the results and provide you with the documentation you need.
Repair vs. Replace: An Honest Look
A common question I get is whether it's better to patch up old ducts or replace them entirely. If your ducts are structurally sound but just have leaky joints, sealing is a permanent, cost-effective solution. Mastic and Aeroseal are rated for the life of the duct system.
However, if the ductwork is collapsed, severely corroded from salt air, or improperly sized for your HVAC unit, patching it is just putting a band-aid on a bigger problem. I will always give you a straight answer on whether a repair will hold up or if you're better off investing in a replacement.
Understanding Your Investment
Duct sealing is one of the highest-ROI improvements you can make. By sealing 20–30% leakage, you can reduce your HVAC energy use by 15–25%. At current electricity rates, the work often pays for itself in under two years.
Our costs are transparent. A typical inspection runs $125–$200. Manual sealing for accessible sections ranges from $400–$1,200, while Aeroseal for a typical single-story home runs $1,500–$3,000. We provide a written estimate after our diagnostic so you know exactly what you're paying for before we start.
Safety and Indoor Air Quality
Your health is the priority. When we use Aeroseal, we use a non-toxic vinyl acetate polymer—the same material used in chewing gum. It is safe for your home. We also ensure that the interior of your ducts is clean before sealing.
We recommend that you step out for the 60 to 90 minutes it takes for the injection process, but you can return as soon as we're done and the system has cycled. We take care of the logistics so you don't have to worry about the process.
Mistakes We See Often
The biggest mistake I see is the use of standard silver 'duct tape' on HVAC systems. It dries out, cracks, and fails within a few years. We only use professional-grade mastic and foil-backed HVAC tape that stays pliable and holds a seal for the long haul.
Another mistake is ignoring duct leakage during an HVAC equipment replacement. If you install a high-efficiency unit but leave the old, leaky ducts in place, you're wasting the efficiency you paid for. We make sure your ductwork is ready to support your system's performance.
Access and Scheduling
Santa Monica homes often have tight access points, whether it's a cramped attic or a difficult-to-reach crawl space. We plan our access routes carefully to minimize disruption to your home. We complete most residential duct sealing projects in a single day.
We are licensed (CSLB #1073586) and insured. If you need us to coordinate with other work or have specific access concerns, just let us know when you call (323) 970-3113. We'll make sure the job is done right.
Is It Time to Seal Your Ducts?
If your energy bills seem high for your home size, or if you notice some rooms are always hotter or colder than others, it's time to look at your ducts. You shouldn't have to guess if your system is working efficiently.
Call LC Heating & Air at (323) 970-3113. We'll come out, test your system, and give you an honest assessment. If we can fix it, we will. If it needs something more, we'll explain why and give you a written estimate so you can make an informed decision.
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
- • Manual mastic sealing: $400–$1,200
- • Aeroseal internal sealing: $1,500–$3,000
- • System size and accessibility
Useful next steps
Duct Sealing in Santa Monica at a glance
- • Duct Sealing provider: LC Heating & Air
- • Location served: Santa Monica, CA 90401
- • 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 Santa Monica
Reviewed by Leo, Owner & Lead Technician
This duct sealing guide for Santa Monica 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 Santa Monica customers say about duct sealing
Verified reviews from homeowners in Santa Monica 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.”
