Code of Federal Regulations > Title 16 > Chapter I > Part 305 > Appendix Appendix D1 - Appendix D1 To Part 305—Water Heaters

Regulations last checked for updates: Apr 03, 2025

Title 16 - Commercial Practices last revised: Mar 27, 2025

Appendix Appendix D1 - Appendix D1 To Part 305—Water Heaters—Gas

Range Information

Capacity (first hour rating in gallons)	Range of estimated annual energy costs (dollars/year)
	Natural gas ($/year)		Propane ($/year)
	Low	High	Low	High
“Very Small”—less than 18	(*)	(*)	(*)	(*)
“Low”—18 to 50.9	162	172	(*)	(*)
“Medium”—51 to 74.9	179	235	361	476
“High”—75 and over	227	336	460	679

(*) No data.

[88 FR 1136, Jan. 9, 2023]

authority: 42 U.S.C. 6294.

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