Charlotte Climate Zone & Energy Code
Climate Zone: IECC Climate Zone 3A (mixed-humid). Charlotte's Carolina Piedmont location produces hot, humid summers (95°F/75°F cooling design) and variable winters with ice storm risk (22°F heating design). Both cooling/dehumidification and heating loads are significant.
Energy Code & Manual J Requirement: North Carolina Residential Building Code (IECC 2015 with NC amendments). ACCA Manual J required for Mecklenburg County and all Charlotte metro HVAC permits.
Local Electric Utility: Duke Energy Carolinas
Building Department: City of Charlotte Mecklenburg County Building Standards Department
Local Trade Association: ACCA Carolina Chapter / ASHRAE Carolinas Chapter / SMACNA Carolinas