Climate ZonesArkansasSebastian

Sebastian, Arkansas HVAC Climate Zone

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

Climate Zone
3A
Winter Design
22°F
Summer Design
94°F
ZIP Codes
8

Sebastian HVAC Contractors: Get Your Free Manual J Report

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

Claim Free Report
No credit card required

Verify Your Sebastian ZIP Code

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

Sebastian covers 8 ZIP codes: 72923, 72936, 72937, 72938, 72940, 72941, 72944, 72945

Sebastian Design Temperatures

Official ASHRAE design temperatures for Sebastian, 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 Sebastian 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 Sebastian

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
Arkansas
HVAC Permits for
Sebastian, Arkansas

Get Free Manual J Calculations for Sebastian

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

Sebastian design temps
Zone 3A compliant
Ready in 60 seconds
Upload Blueprint → Get Free Report

Join 10,000+ Sebastian contractors who trust AutoHVAC