Climate ZonesWisconsinGreen Bay

Green Bay, Wisconsin HVAC Climate Zone

Green Bay is located in IECC Climate Zone 6A (Cold - Humid). Get accurate Manual J load calculations with official design temperatures for Green Bay.

Climate Zone
6A
Winter Design
-9°F
Summer Design
89°F
ZIP Codes
11

Green Bay HVAC Contractors: Get Your Free Manual J Report

Climate Zone 6A requires precise load calculations. Upload your Green Bay blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Green Bay's exact design temperatures (-9°F winter / 89°F summer).

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Verify Your Green Bay ZIP Code

Enter your ZIP code to confirm it's in Green Bay and get climate zone details.

Green Bay covers 11 ZIP codes: 54301, 54302, 54303, 54304, 54305, 54306, 54307, 54308, 54311, 54313 and 1 more

Green Bay Design Temperatures

Official ASHRAE design temperatures for Green Bay, used for accurate Manual J load calculations.

Winter 99% Design Temp
-9°F
Summer 1% Design Temp
89°F
Summer Wet Bulb
73°F

IECC Requirements for Zone 6A

Minimum insulation and window requirements for Green Bay per IECC 2021.

Wall Insulation:R-20
Roof/Ceiling:R-49
Floor Insulation:R-30
Window U-Factor:0.3
Window SHGC:0.4

Energy Code: 2021 IECC

Recommended HVAC Equipment for Green Bay

Heating Systems

Gas furnace (96%+ AFUE)
Boiler
Cold climate heat pump
Typical AFUE
96-98%

Cooling Systems

AC (13-15 SEER)
Typical SEER
13-15 SEER

Related Climate Zone Pages

Learn More About
Climate Zone 6A
View All Zones in
Wisconsin
HVAC Permits for
Green Bay, Wisconsin

Get Free Manual J Calculations for Green Bay

Upload your Green Bay blueprint and get a professional Manual J load calculation using official Zone 6A design temperatures. First report is FREE.

Green Bay design temps
Zone 6A compliant
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