Duluth Climate Zone & Energy Code
Climate Zone: IECC Climate Zone 7 (very cold). Heating design -19°F, cooling design 83°F/66°F.
Energy Code & Manual J Requirement: Minnesota adopted IECC 2012 as the state energy code. ACCA Manual J is required for all HVAC permit applications in St. Louis County.
Local Electric Utility: Minnesota Power (ALLETE)
Building Department: City of Duluth Building Services
Local Trade Association: ACCA Minnesota Chapter