Appendix G1 to Part 305—Furnaces—Gas
| Furnace type | Range of annual fuel utilization efficiencies
(AFUEs) | |
|---|---|---|
| Low | High | |
| Non-Weatherized Gas Furnaces—All Capacities | 80.0 | 99.0 |
| Weatherized Gas Furnaces—All Capacities | 81.0 | 95.0 |
[87 FR 61475, Oct. 12, 2022]
Daily eCFR
Appendix G1 to Part 305—Furnaces—Gas
Furnaces—Gas