Breathitt is located in IECC Climate Zone 4A (Mixed - Humid). Get accurate Manual J load calculations with official design temperatures for Breathitt.
Climate Zone 4A requires precise load calculations. Upload your Breathitt blueprint and get a professional Manual J report in 60 seconds— first report is FREE. Pre-loaded with Breathitt's exact design temperatures (13°F winter / 91°F summer).
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Official ASHRAE design temperatures for Breathitt, used for accurate Manual J load calculations.
Minimum insulation and window requirements for Breathitt per IECC 2021.
Energy Code: 2021 IECC
Upload your Breathitt blueprint and get a professional Manual J load calculation using official Zone 4A design temperatures. First report is FREE.
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