Contra Costa is located in IECC Climate Zone 3B (Warm - Dry). Get accurate Manual J load calculations with official design temperatures for Contra Costa.
Climate Zone 3B requires precise load calculations. Upload your Contra Costa blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Contra Costa's exact design temperatures (35°F winter / 99°F summer).
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Official ASHRAE design temperatures for Contra Costa, used for accurate Manual J load calculations.
Minimum insulation and window requirements for Contra Costa per IECC 2021.
Energy Code: 2022 Title 24
Upload your Contra Costa blueprint and get a professional Manual J load calculation using official Zone 3B design temperatures. First report is FREE.
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