Milwaukee Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 5A (cold-humid). Milwaukee's Lake Michigan location moderates temperatures but winters are very cold (-4°F heating design) with lake-effect snow, and summers are warm and humid (90°F/74°F cooling design).

Energy Code & Manual J Requirement: Wisconsin Residential Building Code (IECC 2009). ACCA Manual J required for all Milwaukee County HVAC permit applications.

Local Electric Utility: We Energies (Wisconsin Energy / WEC Energy Group)

Building Department: City of Milwaukee Department of Neighborhood Services – Building Division

Local Trade Association: ACCA Wisconsin / ASHRAE Wisconsin Chapter / SMACNA Wisconsin