LC Heating & Air provides professional duct sealing services to help Century City homeowners stop energy loss, improve airflow, and lower utility bills. We use duct blaster testing to identify leaks and apply permanent sealing solutions like mastic or Aeroseal.
In Century City, where we deal with everything from high-rise condos to older multifamily properties, your ductwork is the hidden artery of your home. If those ducts have leaks, you are paying to cool your attic, wall cavities, or crawl spaces instead of your actual living area. At LC Heating & Air, I focus on the practical side of HVAC: making sure the air your system works hard to condition actually reaches the rooms where you spend your time.
I am Leo, owner of LC Heating & Air. I don't believe in selling services you don't need. If your system is struggling to keep up, it is often because of air leakage rather than a failing unit. We use precise duct blaster testing to show you exactly how much air you are losing. Once we know the numbers, we can decide if manual mastic sealing or Aeroseal is the right path to get your system back to peak efficiency.
Local HVAC considerations
We are experienced in working with HOAs and building management to coordinate rooftop access, parking, and building entry.
We perform the necessary duct blaster testing to ensure your system meets California energy standards.
Sealing 20–30% duct leakage typically reduces HVAC energy use by 15–25%, often paying for itself within two years.
Why Duct Leaks Are Common in Century City
Century City presents unique challenges for HVAC systems. Many of our local buildings feature compact mechanical closets, rooftop package units, and shared wall configurations. Over time, the constant expansion and contraction of ductwork—combined with the heat-island effect that warms up attics and rooftop spaces—causes joints to pull apart and seals to fail.
When your ducts leak in these tight, often inaccessible spaces, you lose conditioned air before it ever hits a register. In many of the older multifamily properties I visit, I find that the original ductwork was never properly sealed to begin with. If you notice dust buildup around your registers or find that one room is always significantly warmer than the rest, it is usually a sign that your ducts are leaking air into unconditioned spaces.
Repair or Replace? Making the Right Call
I get asked all the time if a system needs to be replaced when it isn't cooling well. My answer is always the same: let's look at the data first. If your equipment is in decent shape but your ducts are leaking 20% or more of your airflow, sealing those ducts is often the most cost-effective way to restore comfort. It is a permanent fix that can save you 15–25% on your HVAC energy use.
However, if the ductwork is falling apart, crushed, or made of outdated materials that are failing, sealing might just be a band-aid. In those cases, I will tell you straight that replacement is the better long-term investment. I provide a written estimate for every job, so you can see the cost of sealing versus the potential for a full system overhaul before we ever start the work.
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 the ductwork (attics, crawl spaces, or finished ceilings)
- • Total square footage of the duct system
- • Choice of sealing method (manual mastic vs. Aeroseal)
- • Existing condition of the ductwork (structural repairs required before sealing)
Useful next steps
Our duct sealing process in Century City
Reviewed by Leo, Owner & Lead Technician
This duct sealing guide for Century City 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 Century City customers say about duct sealing
Verified reviews from homeowners in Century City 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.”
“Got a 3-zone Daikin system for our craftsman home — bedrooms upstairs, living room downstairs. Each room has its own temperature control and the monthly electric bill is actually lower than our old window units combined.”
