Climate ZonesMichiganCalhoun

Calhoun, Michigan HVAC Climate Zone

Calhoun is located in IECC Climate Zone 5A (Cool - Humid). Get accurate Manual J load calculations with official design temperatures for Calhoun.

Climate Zone
5A
Winter Design
0°F
Summer Design
91°F
ZIP Codes
12

Calhoun HVAC Contractors: Get Your Free Manual J Report

Climate Zone 5A requires precise load calculations. Upload your Calhoun blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Calhoun's exact design temperatures (0°F winter / 91°F summer).

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Verify Your Calhoun ZIP Code

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

Calhoun covers 12 ZIP codes: 49011, 49014, 49015, 49016, 49017, 49029, 49033, 49051, 49068, 49092 and 2 more

Calhoun Design Temperatures

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

Winter 99% Design Temp
0°F
Summer 1% Design Temp
91°F
Summer Wet Bulb
75°F

IECC Requirements for Zone 5A

Minimum insulation and window requirements for Calhoun 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: 2020 IECC

Recommended HVAC Equipment for Calhoun

Heating Systems

Gas furnace (95%+ AFUE)
Boiler
Heat pump (cold climate)
Typical AFUE
95-98%

Cooling Systems

AC (13-16 SEER)
Heat pump
Typical SEER
13-16 SEER

Related Climate Zone Pages

Learn More About
Climate Zone 5A
View All Zones in
Michigan
HVAC Permits for
Calhoun, Michigan

Get Free Manual J Calculations for Calhoun

Upload your Calhoun blueprint and get a professional Manual J load calculation using official Zone 5A design temperatures. First report is FREE.

Calhoun design temps
Zone 5A compliant
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