Tempe Climate Zone & Energy Code
Climate Zone: IECC Climate Zone 2B (hot-dry). Tempe's central Phoenix metro position produces the same extreme desert conditions as the wider valley — 110°F cooling design and 30°F heating design. Urban heat island effect in Tempe's dense urban environment can add several degrees above the standard design condition.
Energy Code & Manual J Requirement: Arizona Residential Energy Code (IECC 2018). ACCA Manual J required for residential HVAC permits in Maricopa County and Tempe jurisdictions.
Local Electric Utility: Salt River Project (SRP)
Building Department: City of Tempe Development Services Department
Local Trade Association: ACCA Arizona Chapter