When Larchmont residents need duct sealing, LC Heating & Air delivers same-day service backed by 20+ years of working in the LA market. Larchmont Village sits at the heart of the Hancock Park neighborhood, centered around the charming commercial strip on Larchmont Boulevard between Beverly and Third Street. The residential streets surrounding the village are lined with well-maintained period homes — Craftsman bungalows, Spanish Colonial Revival, and Tudor Revival — most built between 1920 and 1940. That local knowledge means our technicians arrive knowing what equipment and access challenges to expect — cutting diagnostic time and getting repairs done faster.
### What Duct Sealing Accomplishes 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.
Overview
### Manual Sealing vs. Aeroseal LC Heating & Air offers two duct sealing approaches. Manual sealing uses mastic (a durable, flexible sealant applied by hand) and foil tape at accessible duct joints, take-offs, supply and return plenums, and connection points. This is the right approach when significant leakage locations are accessible and the duct system is in otherwise good structural condition. Aeroseal internal sealing is our solution for duct systems where significant leakage is distributed throughout the system in locations that aren't manually accessible — it seals from the inside out using a pressurized polymer aerosol that deposits on and seals leak sites as air passes through them.
### California Energy Code and Duct Sealing California Title 24 requires duct sealing testing (duct blaster test) as part of any HVAC replacement permit — and requires that systems failing the test be sealed to meet the leakage standard before permit signoff. If you've replaced HVAC equipment without a permit, or had a permitted replacement that failed to test the ducts, your system may have significant unsealed leakage.
### What You'll Notice After Duct Sealing Homeowners consistently report three immediate improvements after duct sealing: rooms that were previously hard to condition are now comfortable, the HVAC system runs for noticeably shorter cycles to reach the thermostat setpoint, and utility bills decrease. These improvements are permanent — properly applied mastic and Aeroseal are rated for the life of the duct system.
Local HVAC Challenges
Larchmont's older homes share the challenges common to all pre-war Los Angeles construction: original ductwork that may be undersized, asbestos-wrapped ducts in some pre-1960 homes requiring professional remediation before any duct work, and electrical panels that may need upgrading to support modern HVAC equipment. We assess all of these factors before recommending equipment and include any required upgrades in our proposals so there are no surprises during installation.
Neighborhood Context
The Larchmont area's residential character and walkability have maintained strong property values, and homeowners here tend to invest in quality HVAC systems that will last. We recommend higher-efficiency equipment for Larchmont homes where the ductwork and insulation can support it, and we always provide honest analysis of when a premium system will actually pay for itself through energy savings versus when a standard-efficiency system is the smarter investment for the home's specific characteristics.
Why Choose Us
Call (323) 970-3113 for same-day duct sealing in Larchmont. We answer 24/7 — emergencies and scheduled appointments alike. Licensed, insured, CSLB #1073586.
Our duct sealing process in Larchmont
What Larchmont customers say about duct sealing
Verified reviews from homeowners in Larchmont 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.”