16 CFR Part 305, Appendix G6 — Boilers (Gas)
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| Type | Range of annual fuel utilization efficiencies (AFUEs) |
|---|---|
| Low | High |
| Gas Boilers (except steam)—All Capacities | 84 | 96.4 |
| Gas Boilers (steam)—All Capacities | 82 | 83.4 |
[87 FR 61475, Oct. 12, 2022]