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

01 icon image

Locate

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

02 icon image

Scope

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

03 icon image

Seal

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

04 icon image

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 Moreno
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Excellent service as always
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Voni Schaff profile picture
Voni Schaff
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Very professional serviceman … on time and efficient … polite and considerate. I enjoy the service appointments with Reliable Heating and Air. VFSchaff
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Cal Falk profile picture
Cal Falk
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Always good service bt Darren
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Karen Rubio profile picture
Karen Rubio
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Very smooth, wonderful work and great execution.
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Jenny Gass profile picture
Jenny Gass
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Professional, friendly and trustworthy.
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Patrick Muleady profile picture
Patrick Muleady
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They are the nicest and most efficient service company. I have worked with in recent memory.
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Conley Byrnes profile picture
Conley Byrnes
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On time and great working with the service rep!
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Bret Johnson profile picture
Bret Johnson
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Amazingly on target in timing and service diagnostics and repair of the condenser and charging the system. Great experience!
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Other Services

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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.

Yes, we provide duct sealing across Napa, St. Helena, Calistoga, Yountville, and Sonoma.

A local duct sealing company knows how Napa’s older homes settle over decades, and where the tape and mastic typically fail first.

Locating actual air loss, sealing joints, collars, and plenum connections, checking insulation, and verifying the improvement, not just claiming it.

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.

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.

Count on us

We'll take care of
what you need.

Tell us what’s going on and what part of the valley you’re in. We’ll be there when we say we will, tell you exactly what’s wrong, and give you one honest price.

4405 Solano Ave. Napa, CA 94558
707·252·7227
hello@reliablenapa.com

    or call 707·252·7227 . Se habla español