LC Heating & Air provides expert duct sealing services to help Tarzana homeowners stop energy loss, improve indoor air quality, and ensure their HVAC systems perform as designed. We use diagnostic testing to identify leaks and professional-grade sealing methods to deliver lasting results.
Duct Cleaning & Air Duct Service in Tarzana
LC Heating & Air provides duct cleaning in Tarzana — including air duct cleaning, duct repair service, duct sealing, HVAC ductwork. Whether you need same-day service, a written estimate, or help deciding between repair and replacement, our licensed technicians handle every make and model.
We repair and service all major HVAC brands in Tarzana, including Carrier, Trane, and Goodman, and older or discontinued units. No matter the manufacturer, we diagnose the problem accurately and give you an upfront price before any work begins.
I'm Leo, owner of LC Heating & Air. I spend a lot of time in Tarzana homes, and I see the same issue over and over: homeowners are paying to cool their attics instead of their living rooms. When your ductwork leaks, your HVAC system works harder than it needs to, and your energy bills go up. It’s a common problem in our local housing stock, but it’s one we can fix.
Duct sealing is one of the most effective ways to make your home more comfortable. Whether you have an older ranch house with original ductwork or a newer remodel, sealing those leaks means your air reaches the rooms where you actually spend your time. If you're tired of uneven temperatures or high utility bills, let's take a look at your system.
Emergency calls are answered within 30 minutes — call (323) 970-3113 for dispatch.
Local HVAC considerations
Tarzana (91356)
CSLB #1073586
(323) 970-3113
Duct Issues in Tarzana Homes
Tarzana's 1960s and 1970s housing stock frequently has original duct systems in need of assessment. This era of construction used stamped metal ductwork and early fiberglass flex duct that has often deteriorated over 50 years. We see more duct-related efficiency problems in this era of construction than in either older or newer homes.
Duct sealing matters when conditioned air is leaking into attics, crawl spaces, or wall cavities instead of reaching living areas. In our local climate, with long summer run times and attic heat, these leaks force your equipment to run longer, leading to premature wear and higher energy costs.
Renovations and System Loads
Tarzana has seen increasing home renovation activity. Renovated homes often have updated rooms alongside original construction, creating load imbalances that single-thermostat central systems struggle to manage. We often see that the original ductwork wasn't designed to handle the new floor plan, leading to rooms that stay too hot or too cold.
When we assess a home for duct sealing, we look at the whole picture—duct sizing, register balance, and insulation. Sometimes, sealing is the answer; other times, we might recommend supplemental cooling like a mini-split for a master bedroom addition or a converted garage.
Our Diagnostic Approach
I don't believe in guessing. Before we touch a single duct, we perform a duct blaster test to quantify the existing leakage as a percentage of your system's total airflow. This gives us a baseline.
Once we know where the air is escaping, we decide on the best approach. If the leaks are in accessible areas like the attic or crawl space, we use manual mastic sealing. If the leaks are hidden deep in the walls or throughout the system, we use Aeroseal to seal them from the inside out. After we finish, we run the test again to prove the difference.
Repair or Replace?
A common question I get is whether to patch up old ducts or replace them entirely. If the ductwork is structurally sound but just leaky at the joints, sealing is a great, cost-effective choice. It’s a permanent fix that lasts the life of the system.
However, if the ducts are crushed, moldy, or undersized, sealing won't solve the core problem. In those cases, I’ll be honest with you and recommend replacement. We don't push for a full replacement unless the system truly needs it, and we always provide a written estimate so you can make an informed decision.
What to Expect for Costs
Duct sealing costs vary based on the size of your home and the complexity of the system. Manual mastic sealing for accessible sections typically ranges from $400 to $1,200. For Aeroseal internal sealing, you're looking at $1,500 to $3,000 for a typical single-story home.
Every project includes the before and after duct blaster testing. We keep our pricing transparent and straightforward, so you know exactly what you're paying for before we start.
Scheduling Your Service
We know your time is valuable. We offer same-day scheduling and emergency service for Tarzana residents. When we arrive, we focus on attic access, electrical capacity, and outdoor condenser clearance to ensure the job is done right the first time.
Most residential duct sealing projects are completed in a single day. We’ll coordinate with you to make sure the process is as non-intrusive as possible, especially if we are using the Aeroseal process, which requires a brief period where the home should be vacated.
Avoid the 'Duct Tape' Trap
One of the biggest mistakes I see is homeowners trying to fix leaks with standard silver cloth duct tape. That tape dries out, cracks, and falls off within a few years—it’s not meant for HVAC systems. We use professional-grade mastic, which is a thick, flexible sealant that stays pliable for years.
Another mistake is ignoring the ductwork during an HVAC replacement. If you install a high-efficiency unit but connect it to leaky, inefficient ducts, you’re throwing money away. Always test your ducts when you upgrade your equipment.
Safety First
Your indoor air quality is a priority. The Aeroseal process uses a non-toxic polymer that is safe for your home—it's the same material used in chewing gum. We also ensure that the interior of your ducts is clean before we seal them.
As a licensed C-20 HVAC contractor (CSLB #1073586), we follow all safety protocols and California Title 24 requirements. We provide documentation for your records, which is especially important if you are going through a permitted HVAC replacement.
Is Duct Sealing Right for You?
If your HVAC system runs constantly but your home never feels quite right, or if your energy bills seem high for the size of your house, it’s time to look at your ducts. We don't believe in high-pressure sales; we believe in showing you the data.
If the system is worth repairing, we will tell you. If the pattern points to replacement, we will explain why. Give us a call at (323) 970-3113 to schedule an inspection, and we'll help you decide the best path forward for your home.
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
- • Total square footage of the home
- • Accessibility of ductwork in attics or crawl spaces
- • Choice of manual mastic sealing versus Aeroseal
- • Current condition of existing duct materials
Useful next steps
Duct Sealing in Tarzana at a glance
- • Duct Sealing provider: LC Heating & Air
- • Location served: Tarzana, CA 91356
- • License: CSLB C-20 #1073586
- • Phone: (323) 970-3113
- • Estimate: written estimate before approved work
- • Emergency calls answered within 30 minutes (24/7)
Our duct sealing process in Tarzana
Reviewed by Leo, Owner & Lead Technician
This duct sealing guide for Tarzana 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 Tarzana customers say about duct sealing
Verified reviews from homeowners in Tarzana and nearby neighborhoods who used our duct sealing service.
“LC is our go-to for everything HVAC. They've done two mini splits, a furnace replacement, and annual maintenance for our Tarzana home. Leo runs a tight ship — every tech is professional and they always show up on time.”
“Our AC stopped working during a heat wave and LC had a technician here within two hours. He diagnosed a bad capacitor, had the part on his truck, and fixed it on the spot. Fair price, no upsell. Will use again.”
“Called on a Saturday because AC was blowing warm air. LC answered, sent someone the same afternoon. They found and fixed a refrigerant leak. Professional and reasonably priced.”
