What to expect from LC Heating & Air
### New Duct Installation in Los Angeles Homes Installing new ductwork is required when adding central HVAC to a home that has never had it, when existing ductwork is so deteriorated that repair isn't cost-effective, or when a major renovation creates the opportunity to redesign a poorly performing duct system. LC Heating & Air designs and installs complete duct systems throughout Los Angeles County using flex duct, sheet metal, and duct board construction depending on the application.
Overview
### Duct System Design A properly designed duct system is engineered, not improvised. We use Manual D (the ACCA standard for duct design, companion to Manual J) to calculate supply and return duct sizing for each room, determine optimal supply register locations and throw patterns, calculate system static pressure to ensure the air handler's fan can deliver the designed airflow, and route the duct system to minimize length and bends. A well-designed duct system delivers comfort; a poorly designed one creates complaints that no amount of equipment maintenance will resolve.
### Types of Ductwork We Install Flex duct is the most common residential duct material in LA — it's flexible, relatively inexpensive, and can navigate around obstructions in attic spaces. Sheet metal ductwork is used for main trunk lines, supply plenums, and in applications where durability and airflow efficiency are prioritized. Duct board (fiberglass board) is used in some applications, particularly for custom plenums. We select the appropriate material for each application.
### Insulation and Code Requirements All ductwork in unconditioned spaces (attics, crawl spaces) must be insulated per California Title 24. New duct installation includes R-8 insulation wrapping on all sections in unconditioned spaces, proper duct sealing with mastic at all joints, and a duct leakage test as part of the permit sign-off process.
Our Service Benefits
Duct Installation Cost in Los Angeles
Pricing ranges for common duct installation services. Your actual cost depends on equipment, complexity, and home configuration. We provide an exact written estimate before any work begins.
Service calls start at $125. Prices include parts and labor unless noted. Financing available on equipment installations. Learn about financing →
What Los Angeles Homeowners Say
“LC replaced our entire HVAC system. Leo walked us through every option without pressure. The install team was professional and clean.”
“LC found that our ductwork had separated in the attic. Repaired everything and now every room heats equally. Professional and transparent.”
“LC was the only company that did a Manual J calculation. The new system cools better, runs quieter, and costs less to operate.”
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Signs you need duct installation
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(323) 970-3113 — Free diagnosisOur duct installation process
Duct system design
We perform Manual D design calculations to size all duct sections and determine register locations and sizes.
Material selection and layout
We select appropriate duct materials and plan the physical routing through attic, walls, or crawl space.
Installation
We install all ductwork with proper insulation, sealing at all joints with mastic, and secured hangers throughout.
Testing and commissioning
We perform duct leakage testing for permit compliance and measure airflow at every register to verify design performance.
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What customers say about duct installation
Verified reviews from Los Angeles homeowners who used our duct installation service.
“LC replaced our ancient wall furnace with a proper ducted system. They designed the ductwork from scratch for our bungalow. Took three days and the result is better than I expected — even heat throughout the whole house.”
“Our furnace wasn't heating evenly upstairs. LC found that half of our ductwork in the attic had separated and was blowing hot air into the attic. Repaired everything and now every room heats equally. Professional and transparent.”
“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.”
