2025 Cycle Impacts
Thank you to all who contributed to the 2025 code cycle development process. The resulting code changes will provide significant energy savings to Californians. Below are the estimated impacts of Codes and Standards Enhancement (CASE) initiative efforts by type of energy, code cycle year, building type, construction type, system, and measure.
For a summary of all 2025 code cycle changes and their estimated impacts (which include those from the CASE team along with many other stakeholders), view the California Energy Commission’s 2025 Building Energy Efficiency Standards Summary.
First-Year Savings
Gas & Electricity Savings
Gas:
24 MMTherms
Electricity:
313 GWh
equivalent to the annual electricity usage of
43,195 homes
Peak Demand Reduction
59 MW
equivalent to
0.52 peak demandtraditionally met by peaker plants
GHG Savings
151,244
metric tons of CO2e
equivalent to the carbon sequestered by planting
2,500,833
Equivalencies calculated using data and assumptions provided by the Environmental Protection Agency and the California Energy Commission Energy Assessments Division.
Impacts by Code Cycle
First-year statewide natural gas savings, electricity savings, and peak demand reduction for 2016, 2019, 2022, and 2025 code cycles. The savings from 2016-2022 are based on CEC’s impact analysis and reflect savings associated with all measures (including CASE Team led measures, CEC-led measures that the CASE Team supported, and CEC led measures); however, 2025 savings reflect only measures that were supported by California investor-owned utilities (IOUs), because CEC has not yet completed 2025 impacts analysis.
Natural Gas First-Year Savings by Code Cycle
Electricity First-Year Savings by Code Cycle
First-Year Peak Demand Reduction by Code Cycle
Electricity Savings by Category
Electricity Savings by Building Type (GWh)
Electricity Savings by Construction Type (GWh)
Electricity Savings by System (GWh)
Electricity Savings by Top 10 Measures (GWh)
Natural Gas Savings by Category
Natural Gas Savings by Building Type (MMTherms)
Natural Gas Savings by Construction Type (MMTherms)
Natural Gas Savings by System (MMTherms)
Peak Demand Reduction by Category
Peak Demand Reduction by Building Type (MW)
Peak Demand Reduction by Construction Type (MW)
Peak Demand Reduction by System (MW)
GHG Savings by Category
GHG Savings by Building Type (metric tons of CO2e)
GHG Savings by Construction Type (metric tons of CO2e)
GHG Savings by System (metric tons of CO2e)
Data updated on 9/18/2024
