Climate ZonesLouisianaLafayette

What Climate Zone is Lafayette, Louisiana?

Lafayette is in IECC Climate Zone 2A (Hot - Humid). Get accurate Manual J load calculations with official design temperatures for Lafayette.

Climate Zone
2A
Winter Design
32°F
Summer Design
95°F
ZIP Codes
20

Lafayette HVAC Contractors: Get Your Free Manual J Report

Climate Zone 2A requires precise load calculations. Upload your Lafayette blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Lafayette's exact design temperatures (32°F winter / 95°F summer).

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Verify Your Lafayette ZIP Code

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

Lafayette covers 20 ZIP codes: 70500, 70501, 70502, 70503, 70504, 70505, 70506, 70507, 70508, 70509 and 10 more

Lafayette Design Temperatures

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

Winter 99% Design Temp
32°F
Summer 1% Design Temp
95°F
Summer Wet Bulb
77°F

IECC Requirements for Zone 2A

Minimum insulation and window requirements for Lafayette per IECC 2021.

Wall Insulation:R-13
Roof/Ceiling:R-30
Floor Insulation:R-13
Window U-Factor:0.4
Window SHGC:0.25

Energy Code: 2015 IECC

Recommended HVAC Equipment for Lafayette

Heating Systems

Gas furnace
Heat pump
Electric resistance
Typical AFUE
80-92%

Cooling Systems

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

Related Climate Zone Pages

Learn More About
Climate Zone 2A
View All Zones in
Louisiana
HVAC Permits for
Lafayette, Louisiana

Get Free Manual J Calculations for Lafayette

Upload your Lafayette blueprint and get a professional Manual J load calculation using official Zone 2A design temperatures. First report is FREE.

Lafayette design temps
Zone 2A compliant
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