Water heaters: running cost of 705 models

The average model uses 1,080 kWh a year, which costs $227 a year at 21.0¢/kWh.

Most efficient models

Rank	Model	kWh/year	Cost/year
1	Friedrich PROH40 T2 FD400-15	643	$135
2	Rheem CPROPH40 T2 RH400-15	643	$135
3	Rheem ECEPH40 T2 RH400-15	643	$135
4	Rheem PROPH40 T2 RH375-15	643	$135
5	Rheem PROPH40 T2 RH400-15	643	$135
6	Rheem XE40T10H22U0	643	$135
7	Rheem XE40T10H22U1	643	$135
8	Richmond 10CE40-HP5U15	643	$135
9	Richmond 10E40-HP5U15	643	$135
10	Ruud PROUH40 T2 CD400-15	643	$135
11	Ruud PROUH40 T2 RU375-15	643	$135
12	Ruud PROUH40 T2 RU400-15	643	$135
13	Eco-Logical OMNI-50HP1-1A	681	$143
14	GE Profile PF40S10FPY01	724	$152
15	GE Profile PJ40S10FPY01	724	$152
16	Eco-Logical OMNI-50HP2-1A	769	$162
17	GE Profile PH40S10BPY01	773	$162
18	GE Profile PK50S10FNY01	773	$162
19	Friedrich PROH40 T0 FD120-M	780	$164
20	Friedrich PROH40 T0 FD120-MSO	780	$164
21	Rheem PROPH40 T0 RH120-M	780	$164
22	Rheem PROPH40 T0 RH120-MSO	780	$164
23	Rheem XE40T10HM00U0	780	$164
24	Rheem XE40T10HMS00U0	780	$164
25	Richmond 10E40-HP120M	780	$164
26	Richmond 10E40-HP120MS	780	$164
27	Ruud PROUH40 T0 RU120-M	780	$164
28	Ruud PROUH40 T0 RU120-MSO	780	$164
29	GE Profile PK65S10FNY01	792	$166
30	A. O. Smith HPS10-50H45DV 2**	831	$175
31	A. O. Smith HPSN10-50H45DV 2**	831	$175
32	A. O. Smith HPTS-50 2**	831	$175
33	American HPS10250H045DV 2**	831	$175
34	Lochinvar HPSA050KD 2**	831	$175
35	RELIANCE WATER HEATERS 10-50-DHPTS 2**	831	$175
36	State HPSX-50-DHPT 2**	831	$175
37	Bradford White RE2HP50**-1NCTT	835	$175
38	JETGLAS RE2HP50*-1NCTT	835	$175
39	Arctic Arctic-HP-Hot Water-KA06-50	837	$176
40	PHNIX KA06-50	837	$176

Source: ENERGY STAR (U.S. EPA) · 21.0¢/kWh (August 2026) · Methodology