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Air Duct Replacement · Los Angeles & Ventura County

Expert air duct replacement across Los Angeles.

Old, leaky, or undersized ductwork can lose 20–30% of your conditioned air before it reaches the rooms you're paying to heat and cool. We design and install properly sized duct systems that match your equipment and your home.

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Response
Same day
Rating
5.0★ Google
License
CSLB #1111096

Air duct replacement in Los Angeles — why ductwork matters

Ductwork is invisible — until it fails. Collapsed flex duct, unsealed joints, undersized plenums, and improperly routed branches are the hidden reasons many LA homes never feel comfortable despite a new HVAC system. HVAC in LA performs Manual D duct design calculations before any duct replacement, so the new system is correctly sized for your home's actual load and layout.

We replace ducts in attics, crawlspaces, and walls. We also offer partial replacement (repairing specific sections) when full replacement isn't warranted.

Signs your ductwork needs replacement

  • Rooms that never reach set temperature despite a working system
  • Ducts older than 15–20 years (flex duct degrades)
  • Visible collapse, disconnection or damage in accessible areas
  • Duct leakage test showing >15% leakage to outside
  • Previous pest infestation in ductwork
  • Excessive dust despite filter changes
How it works

Our Air Duct Replacement process

What to expect from first call to final commissioning.

1

Duct inspection & leak test

We pressurize the duct system and measure leakage before recommending replacement. Sometimes targeted sealing is enough.

2

Manual D design

Every replacement duct system is sized to ACCA Manual D — not the same size as what came out.

3

Attic/crawlspace work

Old ductwork removed and disposed. New insulated flex or sheet metal installed per design. Typically 1–2 days.

4

Commissioning

Airflow measured at every register. Balancing dampers adjusted. System confirmed at or above design CFM.

Rebates & incentives

Every rebate dollar, handled for you

HVAC in LA files the paperwork for every program you qualify for. Most projects stack at least two of these.

HEEHRA TECH Clean California LADWP SCE Federal 25C Tax Credit
Questions, answered

Air Duct Replacement FAQs

How do I know if my ducts are leaking?
The gold standard is a duct blower door test — we pressurize the system and measure leakage to outside. Leakage above 15% of system airflow is a strong case for replacement or sealing.
Can you replace just part of my duct system?
Yes. We assess each section and only replace what's failed or undersized. Partial replacements can recover 80% of the benefit at 40–60% of the cost.
Will new ductwork qualify for rebates?
Duct sealing and replacement can qualify as part of a HEEHRA or TECH Clean California project when done alongside qualifying HVAC equipment. Ask us during the consultation.
How long does duct replacement take?
A single-system residential replacement typically takes 1–2 days. More complex homes with multiple zones or tight crawlspaces may take 2–3 days.

Ready to get started?

Free in-home consultation with any new or replacement HVAC system, or any service / repair over $200. We answer the phone 24/7.

📞 Call (818) 697-6699 Request a quote