Open Table
Furnace type Range of annual fuel
utilization efficiencies (AFUEs)
Low High
Electric Furnaces—All Capacities 100.0 100.0

[83 FR 7598, Feb. 22, 2018]


Tried the LawStack mobile app?

Join thousands and try LawStack mobile for FREE today.

  • Carry the law offline, wherever you go.
  • Download CFR, USC, rules, and state law to your mobile device.