Cincinnati Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 4A (mixed-humid). Cincinnati's river valley location produces hot, humid summers (92°F/74°F cooling design) and cold winters (10°F heating design). The Ohio River influence moderates extremes relative to inland Ohio cities.

Energy Code & Manual J Requirement: Ohio Residential Building Code (IECC 2018). ACCA Manual J required for all Hamilton County and Cincinnati metro HVAC permit applications.

Local Electric Utility: Duke Energy Ohio

Building Department: City of Cincinnati Division of Buildings & Inspections

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