Air Duct Repair & Sealing
Air Duct Services Throughout Marin, Sonoma & Napa County
Air ducts are the unsung heroes of your HVAC system. Hidden behind walls, floors, and ceilings, your ductwork is like a superhighway circulating conditioned air throughout your home.
When it comes to improving your home’s airflow and indoor air quality, your air ducts will be there, playing a critical role in your family’s health and comfort.
Our HVAC professionals at Ongaro & Sons are well-versed in installing and repairing ductwork, bringing years of industry knowledge to every project. We never take shortcuts. We know the appropriate material in the appropriate setting provides outstanding air distribution without air leakage. Healthy ducts contribute to year-round comfort, energy savings, and overall lower costs for you.
We’re committed to ensuring your ductwork is a true asset to your home, not a hidden liability.
Whether you need ductwork installation, replacement, repair, or maintenance, our team at Ongaro & Sons is here to help. We offer complete air duct services in Marin, Sonoma, and Napa counties.
Our technicians use advanced tools and proven techniques to ensure your duct system is sealed, insulated, and functioning efficiently.
Proper ductwork not only improves indoor air quality and comfort but also helps reduce energy waste and lower utility bills. Trust us to deliver long-lasting solutions tailored to your home’s unique needs.
All work is performed under active California contractors license #215233.
Do You Have Leaky Ducts?
Think your ducts may have sprung a leak? Here are some giveaways:
Unexpectedly High Energy Bills
If your utility bills are climbing during peak seasons without a clear reason, your ductwork could be the culprit. Leaky ducts allow conditioned air to escape, forcing your HVAC system to run longer and harder just to maintain a comfortable temperature.
Hot or Cold Spots in Your Home
Notice certain rooms that never seem to match the rest of the house in temperature? Leaky or disconnected ducts can prevent air from reaching specific areas, leaving some spaces uncomfortably hot or cold despite the thermostat settings.
Weak Airflow From Vents
If air barely trickles out of some vents, it could indicate leaks or obstructions in the ductwork. Reduced airflow means your system isn’t delivering the air it should, making it harder to heat or cool your home effectively.
Visible Duct Damage
Check your ductwork for crushed, bent, or disconnected sections, especially flexible ducts in attics or crawl spaces. These visible issues often lead to air leaks and system inefficiency, and they usually require professional attention to repair or replace properly.
Dusty or Musty Indoor Air
Leaks in your ducts can pull in dirty air from unconditioned spaces like attics, garages, or crawl spaces. This not only lowers indoor air quality but can also worsen allergies and lead to a musty smell circulating through your vents.
Air Duct Installation or Replacement
We offer high-quality, well-insulated ductwork that will properly heat and cool your home for years to come. Are you looking for replacement ductwork or want to add heating and cooling to a home addition? We offer free consultations and will give you an upfront estimate, no surprise fees. With approved credit, we offer financing options to help with your new ductwork investment.
Air Duct Repair and Maintenance
Are your air ducts struggling to circulate air like they used to? One of our certified experts can diagnose and patch or insulate the punctured part of the duct in record time. We’ll always give you an upfront repair estimate before completing any work.
Regular preventative maintenance is the best thing you can do to protect your ducts and HVAC system. Our air duct professionals can catch issues early before they turn into costly repairs.
During a service visit, one of our experts will use specialized equipment to be sure your air ducts are circulating efficiently. We may also make recommendations to help you save on utilities each month, such as changing your air filter more regularly or scheduling an air duct cleaning.
Schedule Your Air Duct Service
If you suspect leaky or poorly insulated ductwork, our experienced team is here to answer your questions and can quickly dispatch a skilled technician to your home. We proudly serve Marin, Sonoma, and Napa counties, from Corte Madera, Kenwood, and Fair Oaks to Two Rock, Cloverdale, and Napa, as well as surrounding cities in the North Bay. Call us now at 415-741-2820 or book your appointment online.
Your Comfort, Our Priority
Ongaro & Sons is your trusted heating, cooling, plumbing, electrical, and solar expert, specializing in reliable maintenance and repair services that keep your home running efficiently year-round.
Our certified technicians deliver unmatched expertise with fast, friendly service across Marin, Sonoma and Napa County. From HVAC tune-ups to plumbing repairs and electrical upgrades or solar solutions, we focus on energy-efficient performance and long-term comfort. Count on us to maintain the systems that power your home and keep your environment just the way you like it.
Licensed, Insured, Background-Checked
Our technicians are licensed, experienced, and trained to service all makes and models.
Locally Owned and Operated
Serving the Napa, Marin, and Sonoma communities with personalized, hometown service.
Reliable Repairs
We respond quickly and get the job done right the first time, with no surprises.
Since 1932
Why Ongaro & Sons for Air Duct Repair and Sealing
Duct leakage is the cheapest comfort problem to fix and the one most often skipped.
Schedule Service →We measure leakage rather than estimate it
Sealing without testing is guesswork. Measuring first tells you whether the duct system is the actual problem and gives a number to check the work against afterwards.
Attic and crawlspace runs get priority
A leak in conditioned space is wasteful. A leak in a 130 degree attic is far worse, because the return pulls that air directly into the system.
Sealing before equipment, where that is the better buy
If the distribution is losing a large share of what the system produces, sealing it returns more comfort per dollar than a higher efficiency rating would. We will say so.
Documented for Title 24 where the work requires it
Duct work tied to a changeout carries testing and documentation requirements. We handle the paperwork so the job passes inspection.
Sealing verified by a second test
The work gets measured again afterwards, so the improvement is a number you can see rather than a claim on an invoice.
Discount
Membership
Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Members get priority scheduling, discounts, and proactive checkups that catch problems early.
Member Discounts
5% off every repair and replacement, all year long.
Peace of Mind
Proactive checkups catch issues before they become big problems.
Courtesy Reminders
We call you to schedule: never miss a seasonal service.
Value That Lasts
With Ongaro & Sons, you’re investing in quality, integrity, and service that stands the test of time. Explore our current promotions and see the difference real value makes for your HVAC, plumbing, and electrical needs.
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Read MoreFrequently Asked Questions
Can I still create a zone control system if my home has no ductwork?
Yes! Ductless mini split systems allow you to set up multiple air handlers throughout your home. Each air handler acts as a zone, complete with a thermostat.
Can insulation help with noise reduction?
Yes, insulation not only improves energy efficiency but also acts as a sound barrier. Adding insulation to interior walls, floors, and ceilings can significantly reduce noise between rooms or from outside sources.
Do leaky ducts increase energy costs?
Absolutely, leaky ducts can lose up to 30% of heated or cooled air before it reaches your living spaces. Sealing and insulating ducts can boost HVAC efficiency, lower energy bills, and improve overall system performance.