Jacksonville Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 2A (hot-humid). Jacksonville's northeast Florida position produces hot, intensely humid summers (96°F/78°F cooling design) and mild but occasionally cold winters (30°F heating design).

Energy Code & Manual J Requirement: Florida Building Code (Energy Conservation Chapter, IECC 2021). ACCA Manual J required for residential HVAC permits in Duval County and all Jacksonville jurisdictions.

Local Electric Utility: JEA (Jacksonville Electric Authority, City-owned)

Building Department: City of Jacksonville Building Inspection Division

Local Trade Association: ACCA Florida Chapter / ASHRAE North Florida Chapter