Columbus Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 5A (cold-humid). Columbus has a continental climate with hot, humid summers (90°F/72°F cooling design) and cold winters (5°F heating design). Both cooling and heating loads are significant.

Energy Code & Manual J Requirement: Ohio Residential Building Code (IECC 2018). ACCA Manual J required for Franklin County and all Columbus metro HVAC permits. Ohio's older code baseline means envelope performance requirements are lower than many states.

Local Electric Utility: AEP Ohio (Columbus Southern Power / Ohio Power)

Building Department: City of Columbus Building & Zoning Services

Local Trade Association: ACCA Ohio Chapter / ASHRAE Ohio Valley Chapter / SMACNA Ohio