Sioux Falls Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 6A (cold-humid). Sioux Falls has extreme winters (-12°F heating design) and warm summers (92°F/73°F cooling design). Among the coldest major US cities for heating design — heating system sizing is critical.

Energy Code & Manual J Requirement: South Dakota Codified Laws and Building Codes (IECC 2018). ACCA Manual J required for Minnehaha and Lincoln County HVAC permit applications.

Local Electric Utility: Xcel Energy (Northern States Power)

Building Department: City of Sioux Falls Building Services Division

Local Trade Association: PHCC South Dakota / ASHRAE Dakotas Chapter