Chapter 2 defines the words that control the rest of the IFGC, especially terms tied to appliances, venting, and gas piping.
At a Glance
| Lens | Notes |
|---|---|
| Chapter focus | Definitions |
| Why it matters | Chapter 2 defines the words that control the rest of the IFGC, especially terms tied to appliances, venting, and gas piping. |
| In the field | In the field, definition disputes often decide whether equipment, piping, or a venting arrangement falls into one rule path or another. |
Core Fundamentals
- Defined terms are code instructions, not dictionary suggestions.
- Fuel-gas work depends on precise distinctions between appliances, vents, chimneys, connectors, and system parts.
- A small definition change can move a job into a different section or even another code entirely.

