Code of Federal Regulations > Title 16 > Chapter I > Part 305 > Appendix Appendix D4 - Appendix D4 to Part 305—Water Heaters—Instantaneous

Regulations last checked for updates: May 06, 2024

Title 16 - Commercial Practices last revised: May 02, 2024

Appendix Appendix D4 - Appendix D4 to Part 305—Water Heaters—Instantaneous—Gas

Range Information

Capacity	Range of estimated annual energy costs (dollars/year)
Capacity (maximum flow rate); gallons per minute (gpm)	Natural gas ($/year)		Propane ($/year)
Capacity (maximum flow rate); gallons per minute (gpm)	Low	High	Low	High
“Very Small”—less than 1.6	24	30	50	61
“Low”—1.7 to 2.7	(*)	(*)	(*)	(*)
“Medium”—2.8 to 3.9	144	170	291	343
“High”—4.0 and over	210	253	427	511

(*) No data.

[88 FR 1136, Jan. 9, 2023]

authority: 42 U.S.C. 6294.

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