Fix leaky and damaged ducts — better comfort, lower energy bills.
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. LC Heating & Air is based on nearby Fairfax Avenue and has served Larchmont homeowners for over twenty years.
The neighborhood's older construction means most homes were built without central air conditioning and have had HVAC systems added in subsequent decades. These retrofitted systems need more careful assessment than HVAC in newer construction because the ductwork, electrical, and equipment must work within the constraints of existing architecture. We understand these constraints and provide practical solutions that maintain comfort without damaging the character of the home.
Local HVAC considerations
Larchmont
CSLB #1073586
(323) 970-3113
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.
Duct repair in this area often targets disconnected runs, crushed flex duct, leaky boots, damaged insulation, and rooms that never receive the airflow they should. We focus on return sizing, duct leakage, and attic heat gain to ensure your system actually works for your home.
The Hidden Cost of Leaky Ducts
The Department of Energy estimates that typical residential duct systems lose 20–30% of conditioned air through leaks before it reaches the living space. In Los Angeles, where AC runs heavily from May through October, that means you're paying to cool your attic rather than your living room every summer. Duct repair is one of the highest-return HVAC improvements a Los Angeles homeowner can make — and it directly addresses the most common cause of comfort complaints like uneven temperatures and rooms that are always too hot or too cold.
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.
Our Diagnostic Process
We don't guess. We measure airflow at registers, inspect accessible ductwork, and perform duct pressurization testing to quantify leakage. Once we identify the specific leaks and damage, we present a repair scope with written pricing before any work begins. After the repair, we re-test duct leakage and measure airflow at registers to confirm the improvement.
Repair vs. Replace
If the system is worth repairing, we will tell you. If the pattern points to replacement, we will explain why. Often, targeted repairs to specific disconnected sections or obvious damage can restore comfort without needing a full system overhaul. However, if the ductwork is severely undersized or crumbling, we will be honest about whether a patch job is just throwing good money after bad. The estimate should make sense before anyone touches the equipment.
Cost Factors
Duct inspection typically ranges from $125–$200. Targeted repairs to specific accessible damage cost between $200–$600. Comprehensive manual sealing of a full duct system ranges from $800–$2,000, while Aeroseal internal duct sealing for hard-to-access leaks typically costs $1,500–$3,000. We provide a written estimate after the diagnostic so you know exactly what you are paying for.
Health and Safety
Return duct leaks in attics draw unconditioned air — loaded with insulation fibers, dust, and potential mold spores — into the conditioned air stream. Supply duct leaks in attics introduce attic air directly into living spaces through register backdraft. Sealing duct leaks can meaningfully improve indoor air quality, not just comfort and efficiency. We always check for safety hazards before and during our work.
Making the Right Choice
When you call us, you get Leo, owner and lead technician. I believe in being practical and plain-spoken. I'll explain what I check and why it matters. If your ducts are leaking, we'll show you the data from our testing. That detail matters because it changes the repair decision.
We are a local Los Angeles contractor, not a corporate franchise. We don't use hype or push for unnecessary replacements. We want to help you make a decision that makes sense for your home's specific age and construction.
How the visit works
We measure airflow at registers, inspect accessible ductwork, and perform duct pressurization testing to quantify leakage.
We identify the specific leaks and damage and present a repair scope with written pricing before any work begins.
We access damaged sections and seal with mastic, reconnect disconnected flex duct, and repair torn inner liners.
We re-test duct leakage after repair and measure airflow at registers to confirm improvement.
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
Our duct repair process in Larchmont
Reviewed by Leo, Owner & Lead Technician
This duct repair guide for Larchmont 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 Larchmont customers say about duct repair
Verified reviews from homeowners in Larchmont and nearby neighborhoods who used our duct repair 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.”
