Climate ZonesIndianaSullivan

What Climate Zone is Sullivan, Indiana?

Sullivan is in IECC Climate Zone 4A (Mixed - Humid). Get accurate Manual J load calculations with official design temperatures for Sullivan.

Climate Zone
4A
Winter Design
13°F
Summer Design
91°F
ZIP Codes
11

Sullivan HVAC Contractors: Get Your Free Manual J Report

Climate Zone 4A requires precise load calculations. Upload your Sullivan blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Sullivan's exact design temperatures (13°F winter / 91°F summer).

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Verify Your Sullivan ZIP Code

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

Sullivan covers 11 ZIP codes: 47838, 47848, 47849, 47850, 47855, 47861, 47865, 47879, 47882, 47852 and 1 more

Sullivan Design Temperatures

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

Winter 99% Design Temp
13°F
Summer 1% Design Temp
91°F
Summer Wet Bulb
75°F

IECC Requirements for Zone 4A

Minimum insulation and window requirements for Sullivan per IECC 2021.

Wall Insulation:R-20
Roof/Ceiling:R-49
Floor Insulation:R-19
Window U-Factor:0.32
Window SHGC:0.4

Energy Code: 2020 IECC

Recommended HVAC Equipment for Sullivan

Heating Systems

Gas furnace (90%+ AFUE)
Heat pump
Typical AFUE
92-96%

Cooling Systems

AC (14-16 SEER)
Heat pump
Typical SEER
14-16 SEER

Related Climate Zone Pages

Learn More About
Climate Zone 4A
View All Zones in
Indiana
HVAC Permits for
Sullivan, Indiana

Get Free Manual J Calculations for Sullivan

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Sullivan design temps
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