Durham Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 3A (mixed-humid). Durham's Piedmont North Carolina position produces hot, humid summers (93°F/76°F cooling design) with significant latent loads and moderately cold winters (20°F heating design). Both heating and cooling are meaningful loads.

Energy Code & Manual J Requirement: North Carolina Energy Code (IECC 2015). ACCA Manual J required for residential HVAC permits in Durham County and all Durham area jurisdictions.

Local Electric Utility: Duke Energy Progress

Building Department: City of Durham Inspection Division

Local Trade Association: ACCA Carolina Chapter / ASHRAE Carolinas Chapter