Fort Smith Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 3A (mixed-humid). Fort Smith's Arkansas River valley location produces some of the hottest summer design temperatures in Arkansas (100°F dry-bulb) with significant humidity, and variable winters with ice storm risk (18°F heating design).

Energy Code & Manual J Requirement: Arkansas residential energy code (IECC 2009 with AR amendments). ACCA Manual J required for HVAC permits in Sebastian County and Fort Smith metro jurisdictions.

Local Electric Utility: AEP / Southwestern Electric Power (SWEPCO)

Building Department: City of Fort Smith Building Department

Local Trade Association: PHCC Arkansas