Mendocino, California HVAC Climate Zone

Mendocino is located in IECC Climate Zone 3C (Warm - Marine). Get accurate Manual J load calculations with official design temperatures for Mendocino.

Climate Zone
3C
Winter Design
41°F
Summer Design
81°F
ZIP Codes
27

Mendocino HVAC Contractors: Get Your Free Manual J Report

Climate Zone 3C requires precise load calculations. Upload your Mendocino blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Mendocino's exact design temperatures (41°F winter / 81°F summer).

Claim Free Report
No credit card required

Verify Your Mendocino ZIP Code

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

Mendocino covers 27 ZIP codes: 95410, 95415, 95417, 95420, 95427, 95428, 95429, 95432, 95437, 95445 and 17 more

Mendocino Design Temperatures

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

Winter 99% Design Temp
41°F
Summer 1% Design Temp
81°F
Summer Wet Bulb
63°F

IECC Requirements for Zone 3C

Minimum insulation and window requirements for Mendocino per IECC 2021.

Wall Insulation:R-20
Roof/Ceiling:R-30
Floor Insulation:R-19
Window U-Factor:0.32
Window SHGC:0.4

Energy Code: 2022 Title 24

Recommended HVAC Equipment for Mendocino

Heating Systems

Gas furnace
Heat pump
Typical AFUE
90-95%

Cooling Systems

AC (often optional)
Heat pump
Typical SEER
14 SEER

Get Free Manual J Calculations for Mendocino

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

Mendocino design temps
Zone 3C compliant
Ready in 60 seconds
Upload Blueprint → Get Free Report

Join 10,000+ Mendocino contractors who trust AutoHVAC