The 2025 Energy Code becomes effective on January 1, 2026. The revised regulations include the Energy Code Compliance (ECC) Program. Until then HERS Program regulations will continue to be enforced. The ECC Program was developed to continue the field verification and diagnostic testing (FV&DT) provisions given in Title 20 of the California Code of Regulations. …
The 2025 Energy Code expands the use of heat pumps in newly constructed residential buildings, encourages electric-readiness, strengthens ventilation standards, and more. Buildings whose permit applications are applied for on or after January 1, 2026, must comply with the 2025 Energy Code. 2025 Energy Code Benefits New and more efficient technologies are constantly under development, …
