Sioux City Climate Zone & Energy Code
Climate Zone: IECC Climate Zone 5A (cold-humid). Heating design -6°F, cooling design 93°F/76°F.
Energy Code & Manual J Requirement: Iowa adopted IECC 2012 as the state energy code. ACCA Manual J is required for all HVAC permit applications in Woodbury County.
Local Electric Utility: MidAmerican Energy
Building Department: City of Sioux City Building Services Division
Local Trade Association: ASHRAE Iowa Chapter