How it works

The IFGC specifies pipe sizing, venting, combustion air, clearances, appliance connection, leak testing, and inspection procedures for gas-fired equipment. For chimneys and fireplaces, the most relevant chapters cover venting systems, combustion air, and direct-vent appliance installation. The code references UL listings for vent components, ANSI standards for appliances, and material specifications for piping.

Sweeps and gas service technicians work under IFGC requirements when installing or maintaining gas log sets, gas inserts, gas fireplaces, and gas water heaters. Permits for new gas appliances or vent system changes must demonstrate IFGC compliance, and inspections include leak testing, clearance verification, and CO measurement at the appliance.

DFW context

DFW jurisdictions including Dallas, Fort Worth, Plano, Frisco, McKinney, and Allen have adopted the IFGC alongside the IRC, with local amendments. The 2021 IFGC is the current baseline for most municipalities. TSE technicians performing gas appliance work hold appropriate Texas state plumbing or gas-fitter licensing where required and pull permits for new installations and major modifications.

Related terms

• [IRC chapter 10](/glossary/irc-chapter-10/)
• [NFPA 211](/glossary/nfpa-211/)
• [ANSI Z21](/glossary/ansi-z21/)
• [Permit pulled](/glossary/permit-pulled/)

Sources

• IFGC 2021
• NFPA 54 National Fuel Gas Code
• ICC Code Council adoption schedules