Climate ZonesCaliforniaMerced

Merced, California HVAC Climate Zone

Merced is located in IECC Climate Zone 3B (Warm - Dry). Get accurate Manual J load calculations with official design temperatures for Merced.

Climate Zone
3B
Winter Design
35°F
Summer Design
99°F
ZIP Codes
18

Merced HVAC Contractors: Get Your Free Manual J Report

Climate Zone 3B requires precise load calculations. Upload your Merced blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Merced's exact design temperatures (35°F winter / 99°F summer).

Claim Free Report
No credit card required

Verify Your Merced ZIP Code

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

Merced covers 18 ZIP codes: 93620, 93635, 93665, 95301, 95303, 95312, 95315, 95317, 95322, 95324 and 8 more

Merced Design Temperatures

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

Winter 99% Design Temp
35°F
Summer 1% Design Temp
99°F
Summer Wet Bulb
68°F

IECC Requirements for Zone 3B

Minimum insulation and window requirements for Merced 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: 2022 Title 24

Recommended HVAC Equipment for Merced

Heating Systems

Gas furnace
Heat pump
Typical AFUE
90-95%

Cooling Systems

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

Related Climate Zone Pages

Learn More About
Climate Zone 3B
View All Zones in
California
HVAC Permits for
Merced, California

Get Free Manual J Calculations for Merced

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

Merced design temps
Zone 3B compliant
Ready in 60 seconds
Upload Blueprint → Get Free Report

Join 10,000+ Merced contractors who trust AutoHVAC