Napa is located in IECC Climate Zone 3C (Warm - Marine). Get accurate Manual J load calculations with official design temperatures for Napa.
Climate Zone 3C requires precise load calculations. Upload your Napa blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Napa's exact design temperatures (41°F winter / 81°F summer).
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Official ASHRAE design temperatures for Napa, used for accurate Manual J load calculations.
Minimum insulation and window requirements for Napa per IECC 2021.
Energy Code: 2022 Title 24
Upload your Napa blueprint and get a professional Manual J load calculation using official Zone 3C design temperatures. First report is FREE.
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