Climate ZonesAlabamaBirmingham

Birmingham, Alabama HVAC Climate Zone

Birmingham is located in IECC Climate Zone 3A (Warm - Humid). Get accurate Manual J load calculations with official design temperatures for Birmingham.

Climate Zone
3A
Winter Design
22°F
Summer Design
94°F
ZIP Codes
57

Birmingham HVAC Contractors: Get Your Free Manual J Report

Climate Zone 3A requires precise load calculations. Upload your Birmingham blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Birmingham's exact design temperatures (22°F winter / 94°F summer).

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Verify Your Birmingham ZIP Code

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

Birmingham covers 57 ZIP codes: 35203, 35204, 35205, 35206, 35207, 35208, 35209, 35210, 35211, 35212 and 47 more

Birmingham Design Temperatures

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

Winter 99% Design Temp
22°F
Summer 1% Design Temp
94°F
Summer Wet Bulb
75°F

IECC Requirements for Zone 3A

Minimum insulation and window requirements for Birmingham per IECC 2021.

Wall Insulation:R-20
Roof/Ceiling:R-30
Floor Insulation:R-19
Window U-Factor:0.32
Window SHGC:0.25

Energy Code: 2018 IECC

Recommended HVAC Equipment for Birmingham

Heating Systems

Gas furnace
Heat pump
Typical AFUE
90-95%

Cooling Systems

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

Related Climate Zone Pages

Learn More About
Climate Zone 3A
View All Zones in
Alabama
HVAC Permits for
Birmingham, Alabama

Get Free Manual J Calculations for Birmingham

Upload your Birmingham blueprint and get a professional Manual J load calculation using official Zone 3A design temperatures. First report is FREE.

Birmingham design temps
Zone 3A compliant
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