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• N1108.2.4

  More Efficient Thermal Distribution System Options

  • Distribution credits: ductless or hydronic inside, all ducts and equipment inside, at least 80 percent inside, low duct leakage (2.0 or 1.75 cfm/100 sq ft), or room airflow balanced within 20 percent.

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• N1105

  Simulated Building Performance

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• N1107

  Tropical Climate Region Compliance Path

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• N1112

  Repairs

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• N1111.1.1.4

  Floor Alterations

  • Exposed envelope floor cavities are insulated per N1102.1 or an approved design.

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• N1103.3.5

  Ductwork Buried Within Ceiling Insulation

  • Ducts buried in ceiling insulation are R-8 with at least R-19 of insulation around them; in zones 0A-3A supply ducts are fully buried at R-13 with a vapor retarder (R-8 in unvented attics with diffusion ports), except the last 3 ft.

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• N1106.2

  ERI Compliance

  • ERI compliance needs the Table N1106.2 mandatory items and an ERI no higher than Table N1106.5.

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• N1103

  Systems

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Searches all 4,276 IRC 2024 sections, 5,532 IBC 2024 sections and defined terms (Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33 so far) and each city's local rules as they are added. Section numbers and titles from the International Residential Code and International Building Code, 2024 editions, copyrighted by the International Code Council; the IRC's electrical chapters (34 to 43) follow NFPA 70, the National Electrical Code. Requirements are summarized in our words (IRC Chapters 3 to 43, IBC Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33); read the full text at the link on each result. Local values come from each city's published documents.