No commissions
Structural honesty
One honest price
No change orders
Family-owned
Never private equity
Bryant FAD
Factory Authorized
Lic. #
467256
Since
1977
Duct Sealing: Stop Paying to Condition Your Crawl Space
Leaky ducts send a share of every heating and cooling dollar into the attic, the walls, and the crawl space. Duct sealing services are one of the most cost-effective improvements a home can get: more even rooms, less dust, lower bills, without touching the equipment at all.
Find the Leaks
We locate where conditioned air is actually escaping before we seal anything.
Targeted Work
Seal the failures, verify the improvement. Simple, honest scope.
Transparent Pricing
One price for a defined scope of sealing work. No surprises.
Measurable Result
Better delivery to the rooms, verified: not just claimed.
HVAC Air Duct Sealing Catches What You Can't Hear
Duct leakage doesn’t announce itself, it just makes the system run longer, the far bedrooms lag, and the filter clog faster with attic dust. In older Napa homes especially, decades of movement and dried-out tape add up. Sealing puts that lost air back where you paid for it to go.
Duct Sealing Services Before You Upgrade Equipment
Thinking about new equipment because the house never feels right? Duct sealing services are often the cheaper first move, and sometimes they solve the problem outright. If you do replace equipment later, sealed ducts mean the new system can be sized smaller and run cheaper. We’ll give you the honest order of operations.
Accessible connections sealed
Joints, collars, and plenum connections, the usual escape routes.
Returns tightened
Leaky returns pull dirty air in; sealing them improves what you breathe.
Insulation checked
Sealing and insulation work together; we flag gaps while we're in there.
Airflow verified
We confirm the rooms actually feel the difference.
Honest scope
If your ducts are too far gone to seal, we'll tell you, and price the real fix.
Stages of Work
How We Seal Your Ductwork

Locate
We find where conditioned air is actually escaping before sealing anything.

Scope
A defined list of what needs sealing, and one price for it, before work starts.

Seal
Joints, collars, and plenum connections get sealed properly, the usual failure points.

Check Insulation
We flag insulation gaps while we're already in there, since the two go together.

Verify
We confirm the rooms actually feel the difference, not just that the work got done.
Where we work
Duct Sealing Across Napa County and the Surrounding Areas
Whether you need duct sealing in Napa, St. Helena, Calistoga, Yountville, or Sonoma, we’re your local duct sealing company for the whole area, from the city of Napa up the valley and over the hills into Sonoma Valley and Green Valley, for both homes and businesses.
In the valley’s words
Counted on, for fifty years.
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Catherine MorenoTrustindex verifies that the original source of the review is Google.
Excellent service as alwaysPosted on Google![]()
Voni SchaffTrustindex verifies that the original source of the review is Google.
Very professional serviceman … on time and efficient … polite and considerate. I enjoy the service appointments with Reliable Heating and Air. VFSchaffPosted on Google![]()
Cal FalkTrustindex verifies that the original source of the review is Google.
Always good service bt DarrenPosted on Google![]()
Karen RubioTrustindex verifies that the original source of the review is Google.
Very smooth, wonderful work and great execution.Posted on Google![]()
Jenny GassTrustindex verifies that the original source of the review is Google.
Professional, friendly and trustworthy.Posted on Google![]()
Patrick MuleadyTrustindex verifies that the original source of the review is Google.
They are the nicest and most efficient service company. I have worked with in recent memory.Posted on Google![]()
Conley ByrnesTrustindex verifies that the original source of the review is Google.
On time and great working with the service rep!Posted on Google![]()
Bret JohnsonTrustindex verifies that the original source of the review is Google.
Amazingly on target in timing and service diagnostics and repair of the condenser and charging the system. Great experience!Verified by TrustindexTrustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more
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Questions & Answers
Frequently
Asked Questions
Common questions about our services and process. If you don’t find what you’re looking for, call us at 707·252·7227.
Do you offer duct sealing in Napa?
Yes, we provide duct sealing across Napa, St. Helena, Calistoga, Yountville, and Sonoma.
Why choose a local company for air duct sealing near me?
A local duct sealing company knows how Napa’s older homes settle over decades, and where the tape and mastic typically fail first.
What's included in a duct sealing service?
Locating actual air loss, sealing joints, collars, and plenum connections, checking insulation, and verifying the improvement, not just claiming it.
Should I seal my ducts or replace my HVAC system?
Sealing is often the cheaper first move, and it can solve the problem outright. If you replace equipment later, sealed ducts mean it can be sized smaller and run cheaper.
Is HVAC air duct sealing the same as duct cleaning?
No. Cleaning removes dust and debris from inside the ducts. Sealing closes the leaks, joints, collars, and connections, that let conditioned air escape before it reaches a room. They solve different problems.