Title 24 Resources
Guides and articles about California energy code compliance
HERS
What is a HERS Rater? (And When Do You Need One)
Learn what a HERS rater does, why they're required in California, and how to find one for your project.
Forms
CF2R vs CF3R: What's the Difference?
Understanding the difference between CF2R installer certificates and CF3R verifier certificates for Title 24 compliance.
Compliance
California Title 24 Compliance: A Builder's Guide
A complete guide to navigating California's Title 24 energy code for new construction and major renovations.
Compliance
What Does an Acceptance Tester Do?
Title 24 acceptance testing explained — what it covers, when it's required, and how to find a certified tester.
HERSECC
ECC Rater vs HERS Rater: Which Do You Need?
California's energy code is changing. Here's the difference between HERS and ECC raters and which one your 2025+ project needs.