Search the building code.

• G2413.4

  Sizing Tables and Equations

  • Sizing tables G2413.4(1)-(21) cover steel, copper, CSST and PE for natural gas and propane; low-pressure and high-pressure equations apply to smooth pipe.

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

• M1901

  Ranges and Ovens

  International Residential Code, 2024 · Chapter 19, Special Appliances, Equipment and SystemsRead the full text (opens UpCodes in a new tab)

• G2404.9

  Rodentproofing

  • Occupied rooms and food areas are built to keep rodents out.

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

• M2004

  Water Heaters Used for Space Heating

  International Residential Code, 2024 · Chapter 20, Boilers and Water HeatersRead the full text (opens UpCodes in a new tab)

• G2419

  Drips and Sloped Piping

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

• M1803

  Chimney and Vent Connectors

  International Residential Code, 2024 · Chapter 18, Chimneys and VentsRead the full text (opens UpCodes in a new tab)

• G2439.7.4

  Duct Length

  • Maximum dryer duct length comes from the 35 ft rule, the dryer instructions or the power ventilator.

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

• M2301.6

  Filtering

  • Air blown through thermal mass storage into occupied space is filtered at the outlet.

  International Residential Code, 2024 · Chapter 23, Solar Thermal Energy SystemsRead 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.