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.
CBECC 2025
CBECC 2025 has been approved by the California Energy Commission for demonstrating performance compliance with the 2025 Energy Code for nonresidential, multifamily, and single-family residential buildings.
To download the latest versions of CBECC 2025 please visit the CBECC project webpages: CEC GitHub | NORESCO GitHub
More information on CBECC and other approved 2025 compliance software may also be found on the California Energy Commission’s 2025 Energy Code Compliance Software webpage.