Climate ZonesOhioFairfield

Fairfield, Ohio HVAC Climate Zone

Fairfield is located in IECC Climate Zone 5A (Cool - Humid). Get accurate Manual J load calculations with official design temperatures for Fairfield.

Climate Zone
5A
Winter Design
0°F
Summer Design
91°F
ZIP Codes
13

Fairfield HVAC Contractors: Get Your Free Manual J Report

Climate Zone 5A requires precise load calculations. Upload your Fairfield blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Fairfield's exact design temperatures (0°F winter / 91°F summer).

Claim Free Report
No credit card required

Verify Your Fairfield ZIP Code

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

Fairfield covers 13 ZIP codes: 43046, 43102, 43105, 43107, 43112, 43130, 43136, 43147, 43148, 43150 and 3 more

Fairfield Design Temperatures

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

Winter 99% Design Temp
0°F
Summer 1% Design Temp
91°F
Summer Wet Bulb
75°F

IECC Requirements for Zone 5A

Minimum insulation and window requirements for Fairfield per IECC 2021.

Wall Insulation:R-20
Roof/Ceiling:R-49
Floor Insulation:R-30
Window U-Factor:0.3
Window SHGC:0.4

Energy Code: 2021 IECC

Recommended HVAC Equipment for Fairfield

Heating Systems

Gas furnace (95%+ AFUE)
Boiler
Heat pump (cold climate)
Typical AFUE
95-98%

Cooling Systems

AC (13-16 SEER)
Heat pump
Typical SEER
13-16 SEER

Related Climate Zone Pages

Learn More About
Climate Zone 5A
View All Zones in
Ohio
HVAC Permits for
Fairfield, Ohio

Get Free Manual J Calculations for Fairfield

Upload your Fairfield blueprint and get a professional Manual J load calculation using official Zone 5A design temperatures. First report is FREE.

Fairfield design temps
Zone 5A compliant
Ready in 60 seconds
Upload Blueprint → Get Free Report

Join 10,000+ Fairfield contractors who trust AutoHVAC