CBECC uses EnergyPlus and California Simulation Engine (CSE) to perform simulations using a Simplified Geometry Method or Detailed Geometry Method with Sketchup and OpenStudio SketchUp Plugin for Detailed geometry input. Instructions and links for downloading the compliance software and the associated supporting software are listed below.
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DOWNLOAD/INSTALL CBECC 2025.2.0 RC
Click here to download and install CBECC 2025.2.0 RC
Note: CBECC 2025.2.0 RC supports compliance for all building types subject to the 2025 Energy Code. Nonresidential, multifamily, and single family residential, are all supported by CBECC 2025.2.0. There is no separate CBECC-Res version for single-family residential.
CBECC 2025.2.0 RC is for testing the updated software seeking approval at the October 8, 2025 California Energy Commission Business Meeting. This version is for testing only, has not been approved by the California Energy Commission, and may not be used for compliance. Once CBECC 2025.2.0 has been approved, the final version (which can be used for compliance) will be posted.
Click here to view/download the CBECC 2025.2.0 RC Quick Start Guide
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DOWNLOAD/INSTALL CBECC 2025.1.0
Click here to download and install CBECC 2025.1.0
CBECC 2025.1.0 has been approved CBECC 2025.1.0 has been approved by the California Energy Commission and may be used to show performance compliance with the nonresidential and multifamily provisions of the 2025 Energy Code.