Karnes, Texas HVAC Climate Zone

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

Climate Zone
2A
Winter Design
32°F
Summer Design
95°F
ZIP Codes
7

Karnes HVAC Contractors: Get Your Free Manual J Report

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

Claim Free Report
No credit card required

Verify Your Karnes ZIP Code

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

Karnes covers 7 ZIP codes: 78113, 78116, 78117, 78118, 78119, 78144, 78151

Karnes Design Temperatures

Official ASHRAE design temperatures for Karnes, 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 Karnes 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: 2021 IECC

Recommended HVAC Equipment for Karnes

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

Get Free Manual J Calculations for Karnes

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

Karnes design temps
Zone 2A compliant
Ready in 60 seconds
Upload Blueprint → Get Free Report

Join 10,000+ Karnes contractors who trust AutoHVAC