LC Heating & Air provides expert duct sealing services to help Westwood homeowners stop energy loss, lower utility bills, and improve indoor comfort. We use professional duct blaster testing to identify leaks and offer both manual mastic sealing and Aeroseal solutions.
Duct Cleaning & Air Duct Service in Westwood
LC Heating & Air provides duct cleaning in Westwood — 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 Westwood, 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.
Westwood encompasses the area surrounding UCLA, bounded roughly by Bel Air to the north, Brentwood to the west, and Century City to the south. The neighborhood has an unusually diverse mix of housing: single-family homes in the Westwood Hills area, large apartment and condominium buildings along Wilshire Boulevard, and student-oriented rental properties near the UCLA campus. LC Heating & Air serves all of Westwood's 90024 and 90025 zip codes with same-day HVAC service.
Duct sealing is one of the highest-ROI home energy improvements available to Los Angeles homeowners. When conditioned air leaks into attic or wall cavities before reaching the living space, you're paying to condition space you don't occupy. Studies of California homes consistently show 20–30% duct leakage in older homes — and every percentage point of leakage reduction shows up directly in your utility bill.
Emergency calls are answered within 30 minutes — call (323) 970-3113 for dispatch.
Local HVAC considerations
Westwood (90024, 90025)
CSLB #1073586
Duct sealing, repair, and diagnostic testing
Local HVAC Challenges in Westwood
Westwood's mix of single-family homes and high-rise condominiums means we work with both traditional split-system HVAC and commercial-grade building systems. Condo buildings along the Wilshire Corridor typically use centralized chiller plants with individual fan coil units — maintenance and repair on these systems requires different expertise than residential split systems. We service both types and can work with HOA maintenance schedules and building management companies.
The UCLA student rental market means many Westwood properties have HVAC systems that see heavy use and may not receive the maintenance that owner-occupied homes get. We work with property managers throughout Westwood to establish preventive maintenance programs that reduce emergency calls and extend equipment life. For homeowners in the residential areas, we provide the same thorough service we deliver throughout our coverage area — honest diagnosis, fair pricing, and quality work.
Understanding Your Duct System
Many homes in Westwood rely on older ductwork that has never been inspected. Whether you are in a historic home or a modern condo, duct leakage is common. In older multifamily properties, we often find ductwork hidden in tight mechanical closets or shared wall cavities. These areas are prone to leaks that pull in dust or unconditioned air, which then gets pushed directly into your living space.
If you are preparing for an HVAC replacement, sealing the ducts is a smart move to ensure your new equipment performs as intended. California Title 24 requires duct leakage testing for permitted replacements, and we ensure your system meets these standards.
Our Diagnostic Process
We don't guess. We start with a duct blaster test to quantify exactly how much air is leaking from your system. This gives us a baseline percentage of airflow loss. Once we know where the leaks are, we determine if manual mastic sealing or Aeroseal is the right approach for your specific home layout.
After the work is finished, we perform a post-sealing verification test. You get the before-and-after numbers in writing, so you know exactly what you paid for and how much efficiency you gained.
Repair vs. Replacement
Not every duct system needs to be replaced. If your ducts are structurally sound but leaky at the joints, manual mastic sealing is a permanent, cost-effective fix. Mastic remains flexible and adheres for the life of the system, unlike cheap duct tape that dries out and fails.
If the ductwork is crushed, heavily contaminated, or falling apart, we will tell you honestly that sealing won't solve the problem. In those cases, we discuss replacement options. We prioritize what makes sense for your home, not what makes for a quick sale.
Cost and Value Factors
Duct sealing costs vary based on the size of your home and the accessibility of your ductwork. Manual sealing typically ranges from $400 to $1,200, while Aeroseal internal sealing ranges from $1,500 to $3,000. Both options include the necessary duct blaster testing.
Consider the long-term savings: sealing 20–30% leakage can reduce your HVAC energy use by 15–25%. At current LA electricity rates, the energy savings often pay for the service within two years.
Access and Scheduling in Westwood
Working in Westwood often means navigating dense buildings, rooftop equipment, and limited parking. We are experienced in coordinating with HOAs and property managers to ensure we have the necessary access to building mechanical rooms or rooftop units.
We respect your time and your building's rules. Whether it's a high-rise on the Wilshire Corridor or a single-family home in Westwood Hills, we plan our arrival and work windows to minimize disruption to your day.
Common Mistakes to Avoid
The biggest mistake we see is the use of standard silver 'duct tape' on HVAC joints. It is not rated for heating and cooling systems and will fail within a few years. Always use mastic or foil-backed HVAC tape.
Another mistake is ignoring duct leakage during an HVAC replacement. Installing a high-efficiency unit onto a leaky duct system is like putting a high-performance engine in a car with a flat tire. You won't get the comfort or the efficiency you paid for.
Health and Safety
Your indoor air quality matters. Leaky ducts can pull in dust, insulation fibers, and pollutants from attics or crawl spaces. Sealing these leaks keeps that air out of your living space.
Regarding the Aeroseal process, it is safe and non-toxic. The material used is similar to what is found in chewing gum. We recommend vacating the home during the 60–90 minute injection process as a precaution, but you can return immediately once we are finished.
Is Duct Sealing Right for You?
If your energy bills are high for the size of your home, or if you notice uneven temperatures between rooms, duct sealing is often the answer. It is a targeted, high-value improvement that addresses the root cause of energy waste.
If you are unsure, call LC Heating & Air at (323) 970-3113. We will come out, test your system, and give you a straight answer about whether sealing will solve your comfort issues or if other repairs are needed. We are here to help you 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
- • Accessibility of ductwork (attic, crawl space, or high-rise mechanical closet)
- • Total square footage of the home
- • Current leakage rate of the system
- • Choice between manual mastic sealing and Aeroseal
Useful next steps
Duct Sealing in Westwood at a glance
- • Duct Sealing provider: LC Heating & Air
- • Location served: Westwood, CA 90024
- • 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 Westwood
Reviewed by Leo, Owner & Lead Technician
This duct sealing guide for Westwood 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 Westwood customers say about duct sealing
Verified reviews from homeowners in Westwood 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.”
