Title 24, Part 6 is the Building Energy Efficiency Standards (California Energy Code), mandating minimum performance for new construction, additions, and major alterations. It sets prescriptive (component-specific) or performance (whole-building modeling) paths to meet energy budgets based on climate zone and building type. Key goals: promote renewables, decarbonization, and indoor air quality. The 2025 update (effective January 1, 2026) strengthens heat pump requirements, end-of-life HVAC replacements, and solar/storage standards.
