Climate ZonesTexasHenderson

Henderson, Texas HVAC Climate Zone

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

Climate Zone
3A
Winter Design
22°F
Summer Design
94°F
ZIP Codes
10

Henderson HVAC Contractors: Get Your Free Manual J Report

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

Claim Free Report
No credit card required

Verify Your Henderson ZIP Code

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

Henderson covers 10 ZIP codes: 75124, 75143, 75148, 75163, 75751, 75756, 75758, 75770, 75778, 75782

Henderson Design Temperatures

Official ASHRAE design temperatures for Henderson, 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 Henderson 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 Henderson

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
Texas
HVAC Permits for
Henderson, Texas

Get Free Manual J Calculations for Henderson

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

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

Join 10,000+ Henderson contractors who trust AutoHVAC