Bay Area(408) 304-4329 Central Coast(805) 769-8494
Ask for a quote
Ask for a quote
Gas furnace on its attic stand in Santa Clara, ducts and flue running out the top
Santa Clara
Gas furnace with its flue beside a water heater in a San Francisco garage
San Francisco
CSLB license 1162030 Class C20, active

Furnace installation, San Jose

Furnace installation, sized to your house and permitted

Here is what a furnace replacement with Air Champs actually involves, start to finish.

Ask for a quote

Or call us:

Bay Area(408) 304-4329San Jose, Fremont, Oakland Central Coast(805) 769-8494Salinas, Monterey, SLO County, Santa Barbara
Main number (408) 603-8784

Step by step

What happens on a furnace replacement

  1. Size it

    We size it first: the rooms, the ducts, where the old unit sits and how much heat the house really needs.

    Air handler on a plywood platform in a Sunnyvale attic, silver flex duct and a drain line
    Sunnyvale

  2. Swap it

    The old furnace comes out. The new one goes in on its platform or stand, in the closet, attic, garage or crawl space.

    Gas furnace raised on a stand in a Santa Clara attic, yellow gas line and silver ducts
    Santa Clara

  3. Connect it

    The gas line, the flue and the condensate drain connect to the new furnace.

    Gas furnace in a Santa Clara attic with its black vent stack and white drain line
    Santa Clara

  4. Start it

    Then the new furnace is started up.

    Gas furnace with its flue beside a water heater in a San Jose closet
    San Jose

  5. Close the permit

    The permit closes with the city's final inspection.

The rules that come with it

Air handler with an insulated duct on a plywood floor in a Newark attic
Newark

  • California Energy Commission

    Permits applied for on or after January 1, 2026, are held to the 2025 Energy Code.

    California Energy Commission Checked November 2026

  • California Energy Commission

    Depending on the work, state HERS field testing can be required, and properly permitted work is what triggers it.

    California Energy Commission Checked November 2026

  • California Energy Commission

    You have the right to hire a HERS rater who is independent of the contractor, and to see the completed forms.

    California Energy Commission Checked November 2026

  • Bay Area Air District

    San Jose is inside the Bay Area Air District, which covers Santa Clara County and its neighbors. Its zero-NOx standard applies to residential furnaces manufactured after January 1, 2029.

    Bay Area Air District, Building Appliances Rule Implementation Checked November 2026

Job photos

Furnaces we have worked on

See every job

City permit rule

City of San Jose

Do I need a permit to replace a furnace in San Jose?

Plan on it. Furnace replacement sits on San Jose's list of mechanical permits filed online at SJPermits.org, and the city's page is the final word.

  • San Jose lists furnace replacement under Mechanical on the permits you can apply for online at SJPermits.org.
  • Most of San Jose's online permits need no plans; only rooftop solar does.

City of San Jose, SJPermits.org Available Online Permits Checked November 2026

San Jose
Carrier furnace in a Fremont attic with insulated silver ducts and a plywood walkway
Fremont
Gas furnace with its flue beside a water heater in a San Jose closet
San Jose
Carrier furnace on a platform in a low Cupertino crawl space, silver ducts round it
Cupertino

Pick your area

Cold house? Call before the next cold night.

Main number (408) 603-8784Hours Mon to Fri, 8 AM to 5 PM

Ask for a quote

Get a quote by email

In your email, include:

  1. What it is doing, or what you want put in
  2. The city you are in
  3. A number to call you back on
Email us
airchampshvac@gmail.com

What we do with what you send: Privacy Policy

© 2026 Air Champs. All rights reserved. Made by George Gabriel

Privacy Policy

Bay Area(408) 304-4329 Central Coast(805) 769-8494