Lawrence, Arkansas HVAC Climate Zone

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

Climate Zone
3A
Winter Design
22°F
Summer Design
94°F
ZIP Codes
13

Lawrence HVAC Contractors: Get Your Free Manual J Report

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

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Verify Your Lawrence ZIP Code

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

Lawrence covers 13 ZIP codes: 72410, 72415, 72433, 72434, 72440, 72445, 72457, 72458, 72459, 72466 and 3 more

Lawrence Design Temperatures

Official ASHRAE design temperatures for Lawrence, 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 Lawrence 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: 2021 IECC

Recommended HVAC Equipment for Lawrence

Heating Systems

Gas furnace
Heat pump
Typical AFUE
90-95%

Cooling Systems

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

Get Free Manual J Calculations for Lawrence

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

Lawrence design temps
Zone 3A compliant
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