Green Bay Climate Zone & Energy Code

Climate Zone: IECC Climate Zone 6A (cold-humid). Green Bay's Lake Michigan inlet location produces very cold winters (-9°F heating design) and warm summers (88°F/72°F cooling design). Heating system sizing and cold-climate heat pump selection are critical.

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

Local Electric Utility: WPS (Wisconsin Public Service / WEC Energy Group)

Building Department: City of Green Bay Building Inspection Division

Local Trade Association: ACCA Wisconsin / ASHRAE Wisconsin Chapter