1. Regulations
  2. title 16
  3. chapter I
  4. part 305
  5. appendix AppendixG1

Appendix G1 - Appendix G1 to Part 305—Furnaces—Gas

Furnace type Range of annual fuel utilization efficiencies
(AFUEs) 		Low High Non-Weatherized Gas Furnaces—All Capacities80.099.0 Weatherized Gas Furnaces—All Capacities81.095.0
[87 FR 61475, Oct. 12, 2022]

AUTHORITY: 42 U.S.C. 6294.

SOURCE: 52 FR 46894, Dec. 10, 1987, unless otherwise noted.