16 CFR Appendix G1 to Part 305 - Furnaces - Gas

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 98.7
Weatherized Gas Furnaces - All Capacities 81.0 95.0
[83 FR 7598, Feb. 22, 2018]

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