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California energy code testing for AC changeouts

Source: California HVAC Help (californiahvachelp.com), part of the Local Help Stations network (localhelpstations.com). Last updated November 2, 2026.

The 2025 Energy Code applies to buildings whose permit applications are applied for on or after January 1, 2026. (source: California Energy Commission)

The California Energy Commission's Energy Code Compliance (ECC) Program, which replaces the HERS field verification program, became effective with the 2025 Energy Code. Testing is required when the project includes features that must be tested. (source: California Energy Commission)

For urgent alterations such as HVAC changeouts, the certificates can be registered later, but before the permit is closed or finalized. (source: California Energy Commission)

San Jose's HVAC page (updated April 2026) still uses the older name "HERS" for duct leakage and mini-split refrigerant charge testing. The Energy Commission says ECC replaces HERS field verification, so both names describe the same kind of rater testing. Ask your city which form it wants. (source: City of San Jose Development Services Permit Center) (source: California Energy Commission)

On this site: Do I need a permit to replace an AC or furnace in California? · California energy code testing for AC changeouts · Mini-split permits in California · HVAC permit costs in California cities · HVAC work that needs no permit in California cities · Can I do my own HVAC work in California? · When does a California contractor need a license? · California home improvement contract and payment rules · How to check a California contractor and complain · Cities · FAQ · Sources

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