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Search the building code.

Every 2024 IRC section and the IBC as it loads, by number or topic, plus the local rules for your city. Free to search.

Detached houses, duplexes and townhouses up to 3 stories with their own exits use the IRC; every other building uses the IBC (IBC 101.2).

A random sample from 1,054 sections for San Antonio, TX, the 2024 IRC and IBC

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  • G2406.2

    Prohibited Locations

    • No gas appliances in bedrooms, bathrooms, toilet rooms or storage closets, except direct-vent units, vented heaters in large enough rooms, small wall-mounted unvented heaters with ODS (6,000 Btu/h bath, 10,000 bedroom), sealed closets with outdoor air, and dryers in baths with a 100 sq in opening.

    International Residential Code, 2024 · Chapter 24, Fuel GasRead the full text (opens UpCodes in a new tab)

  • G2428.1

    Definitions

    • Vent table terms: FAN Min/Max and NAT Max are single-appliance limits; FAN+FAN, FAN+NAT and NAT+NAT are combined common-vent limits; NA means not allowed.

    International Residential Code, 2024 · Chapter 24, Fuel GasRead the full text (opens UpCodes in a new tab)

  • M1408.4

    Access

    • Floor furnace access is an 18 x 24 in foundation opening or a 22 x 30 in trap door, big enough to replace any part.

    International Residential Code, 2024 · Chapter 14, Heating and Cooling Equipment and AppliancesRead the full text (opens UpCodes in a new tab)

  • G2427.10.2.4

    Low-Heat Appliance

    • Low-heat appliance connectors are factory chimney sections or galvanized steel by diameter: 0.019 in under 6 in up to 0.056 in over 16 in.

    International Residential Code, 2024 · Chapter 24, Fuel GasRead the full text (opens UpCodes in a new tab)

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.

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