16 CFR Appendix G1
Furnaces—Gas
February 12, 2021
Open Table
| Furnace type | Range of annual fuel utilization efficiencies (AFUEs) |
|
|---|---|---|
| Low | High | |
| Non-Weatherized Gas Furnaces—All Capacities | 80.0 | 98.7 |
| Weatherized Gas Furnaces—All Capacities | 81.0 | 95.0 |
[83 FR 7598, Feb. 22, 2018]
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