Climate Zone tool, maps, and information supporting the California Energy Code

To standardize calculations and to provide a basis for presenting the prescriptive
requirements, the Energy Commission has established a set of standard climate data for
each of the 16 climate zones. The climate zone definitions and data are the same for both the low-riseresidential and the nonresidential standards.
Beginning with the 2013 Energy Standards, ZIP code boundaries have been used to define
climate zone boundaries; under these rules, a given ZIP code is always located entirely
within a single climate zone.

Go to the link below to find out your Climate Zone based on zip code.

https://www.energy.ca.gov/maps/renewable/BuildingClimateZonesByZIPCode.pdf

(Excerpted from CEC Title-24 Part 6 Residential Compliance Manual)

Title 24 is an estimation of how much energy a proposed building will consume. This estimate is then compared with a comparable ‘code minimum’ building to show that the proposed design is more energy efficient. The results are printed out in the form of a report that can be submitted to building department for permit.

Climate Zone tool, maps, and information supporting the California Energy Code

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