StacksVerified U.S. regulatory reference

16 CFR Part 305, Appendix G7

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
TypeRange of annual fuel utilization efficiencies (AFUEs)
LowHigh
Oil Boilers—All Capacities85 | 88.2

[87 FR 61475, Oct. 12, 2022]