Frequently asked questions
Concise answers about Title 24 energy compliance and how we work.
How to find your zone
Use the CEC’s official climate zone lookup by address or ZIP code. ZIP codes can contain more than one zone; local jurisdictions may designate one zone for a whole ZIP code.
Why it matters
A home in Palm Springs (Zone 15) and one in Arcata (Zone 1) face very different conditions. The Energy Code adjusts requirements accordingly.
Browse our climate zone directory for zone-by-zone guidance.