Winston-Salem Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 4A (mixed-humid). Winston-Salem's higher Piedmont elevation produces slightly cooler conditions than eastern NC — 18°F heating design and 93°F/74°F cooling design. Ice storm risk in winter is significant and differentiates Winston-Salem from lower-elevation NC markets.

Energy Code & Manual J Requirement: North Carolina Energy Code (IECC 2015). ACCA Manual J required for residential HVAC permits in Forsyth County and Winston-Salem jurisdictions.

Local Electric Utility: Duke Energy Carolinas

Building Department: City of Winston-Salem Inspections Division

Local Trade Association: ACCA Carolina Chapter