Climate ZonesWisconsinColumbia

Columbia, Wisconsin HVAC Climate Zone

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

Climate Zone
6A
Winter Design
-9°F
Summer Design
89°F
ZIP Codes
12

Columbia HVAC Contractors: Get Your Free Manual J Report

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

Claim Free Report
No credit card required

Verify Your Columbia ZIP Code

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

Columbia covers 12 ZIP codes: 53555, 53901, 53911, 53923, 53925, 53928, 53932, 53935, 53954, 53955 and 2 more

Columbia Design Temperatures

Official ASHRAE design temperatures for Columbia, 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 Columbia 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 Columbia

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
Columbia, Wisconsin

Get Free Manual J Calculations for Columbia

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

Columbia design temps
Zone 6A compliant
Ready in 60 seconds
Upload Blueprint → Get Free Report

Join 10,000+ Columbia contractors who trust AutoHVAC