50-gallon electric storage water heaters

144 basic models from 23 brands, in the 46-to-59-gallon group.

Basic models: 14423 brands
Advertised figures that differ from the certified figure: 11of 292Storage volume, UEF, first-hour

Difference (gal): Sold size minus storage volume. A dash means either figure is missing, a range, or not whole gallons.

The tested volume is below the sold size for 105 of 144 models with both figures.

Of these 144 models, 120 were tested for medium hot water use. The highest efficiency (UEF) on that test is 0.93, reached by 22 of 120 models.

Of the 505 electric storage models on this site, 144 are in the 50-gallon group. These 144 models carry 23 brand names.

These tanks are sold as 46 to 55 gallons, within the group's 46 to 59 gallons. The test measured 41 to 55 gallons of storage volume, depending on the model. In the test's first hour, these tanks deliver 40 to 78 gallons, depending on the model.

For 100 of these models, makers and stores give 292 figures for storage volume, UEF, or first-hour rating. Of those 292 figures, 11 differ from the certified figure.

Certified figures by basic model

Sorted by size, smallest first, then by UEF, highest first.

50-gallon electric storage water heaters: certified figures by basic model
Basic model	Type	Size (gal)	Storage volume (gal)	Difference (gal)	UEF	Draw pattern	First-hour rating (gal)
AMERICAN STANDARD WATER HEATERS ENS50L-*	Electric storage	46	41	+5	0.95	Low	55
AMERICAN STANDARD WATER HEATERS ENS50LU-*	Electric storage	46	42	+4	0.93	Medium	52
Friedrich PROE47 S2 RH95	Electric storage	47	43	+4	0.93	Medium	54
Friedrich PROE47 S2 RH CG	Electric storage	47	43	+4	0.92	Medium	54
Rheem PROE47 S2 RH CG	Electric storage	47	43	+4	0.92	Medium	54
Richmond PROE47 S2 RH CG	Electric storage	47	43	+4	0.92	Medium	54
A. O. Smith ENLB-50 1**	Electric storage	48	44	+4	0.93	Medium	60
American ENLB-50 1**	Electric storage	48	44	+4	0.93	Medium	60
Lochinvar ENLB-50 1**	Electric storage	48	44	+4	0.93	Medium	60
RELIANCE WATER HEATERS ENLB-50 1**	Electric storage	48	44	+4	0.93	Medium	60
State ENLB-50 1**	Electric storage	48	44	+4	0.93	Medium	60
U.S. Craftmaster ENLB-50 1**	Electric storage	48	44	+4	0.93	Medium	60
A. O. Smith EELBU-50 1**	Electric storage	48	44	+4	0.92	Medium	55
American EELBU-50 1**	Electric storage	48	44	+4	0.92	Medium	55
Lochinvar EELBU-50 1**	Electric storage	48	44	+4	0.92	Medium	55
State EELBU-50 1**	Electric storage	48	44	+4	0.92	Medium	55
A. O. Smith ENLB-50W 1**	Electric storage	48	44	+4	0.91	Low	40
State ENLB-50W 1**	Electric storage	48	44	+4	0.91	Low	40
GE GE50T10BAM02	Electric storage	50	50	0	0.93	High	78
GE GE50T12BLM01	Electric storage	50	50	0	0.93	High	78
GE GE50S10BAM01	Electric storage	50	50	0	0.93	High	76
GE GE50T10BAM01	Electric storage	50	50	0	0.93	High	76
GE GE50S10BMM01	Electric storage	50	50	0	0.93	High	75
GE GE50S12BLM01	Electric storage	50	50	0	0.93	High	75
Friedrich PROE50 T2 RH95	Electric storage	50	45	+5	0.93	Medium	63
Rheem PROE50 T2 RH95	Electric storage	50	45	+5	0.93	Medium	61–63
Richmond PROE50 T2 RH95	Electric storage	50	45	+5	0.93	Medium	63
Ruud PROE50 T2 RH95	Electric storage	50	45	+5	0.93	Medium	63
Friedrich PROE50 M2 RH95	Electric storage	50	45	+5	0.93	Medium	62
Rheem PROE50 M2 RH95	Electric storage	50	45	+5	0.93	Medium	61–62
Richmond PROE50 M2 RH95	Electric storage	50	45	+5	0.93	Medium	62
Ruud PROE50 M2 RH95	Electric storage	50	45	+5	0.93	Medium	62
Lennox WHES050L45TN240S****	Electric storage	50	42	+8	0.93	Medium	52
A. O. Smith HETF-50 1**	Electric storage	50	45	+5	0.92	Medium	74
A. O. Smith PETX-50 1**	Electric storage	50	46	+4	0.92	Medium	74
American HETF-50 1**	Electric storage	50	45	+5	0.92	Medium	74
American PETX-50 1**	Electric storage	50	46	+4	0.92	Medium	74
GE GE50S10BAM02	Electric storage	50	50	0	0.92	Medium	74
Lochinvar HETF-50 1**	Electric storage	50	45	+5	0.92	Medium	74
RELIANCE WATER HEATERS HETF-50 1**	Electric storage	50	45	+5	0.92	Medium	74
RELIANCE WATER HEATERS PETX-50 1**	Electric storage	50	46	+4	0.92	Medium	74
State HETF-50 1**	Electric storage	50	45	+5	0.92	Medium	74
State PETX-50 1**	Electric storage	50	46	+4	0.92	Medium	74
A. O. Smith PESX-50 1**	Electric storage	50	46	+4	0.92	Medium	70
American PESX-50 1**	Electric storage	50	46	+4	0.92	Medium	70
RELIANCE WATER HEATERS PESX-50 1**	Electric storage	50	46	+4	0.92	Medium	70
State PESX-50 1**	Electric storage	50	46	+4	0.92	Medium	70
A. O. Smith HESF-50 1**	Electric storage	50	46	+4	0.92	Medium	67
American HESF-50 1**	Electric storage	50	46	+4	0.92	Medium	67
AMERICAN STANDARD WATER HEATERS ENS50H-DR***	Electric storage	50	46	+4	0.92	Medium	67
Ariston ENS50H-DR***	Electric storage	50	46	+4	0.92	Medium	67
Lennox WHES050T45TD240S****	Electric storage	50	46	+4	0.92	Medium	67
Lochinvar HESF-50 1**	Electric storage	50	46	+4	0.92	Medium	67
RELIANCE WATER HEATERS HESF-50 1**	Electric storage	50	46	+4	0.92	Medium	67
State HESF-50 1**	Electric storage	50	46	+4	0.92	Medium	67
AMERICAN STANDARD WATER HEATERS ENS50H*	Electric storage	50	45	+5	0.92	Medium	65
Ariston ENS50H*	Electric storage	50	45	+5	0.92	Medium	65
Lennox WHES050T45TN240S****	Electric storage	50	45	+5	0.92	Medium	65
Bradford White RE250T-****	Electric storage	50	45	+5	0.92	Medium	64
Midea D50-45FH	Electric storage	50	47	+3	0.92	Medium	64
Midea MEWH50S82S1	Electric storage	50	47	+3	0.92	Medium	64
MRCOOL MEWH50S82S1	Electric storage	50	47	+3	0.92	Medium	64
Stream 33 MEWH50S82S1	Electric storage	50	47	+3	0.92	Medium	64
Friedrich XE50M12CS55U1	Electric storage	50	45	+5	0.92	Medium	63
Friedrich XE50T12CS55U1	Electric storage	50	45	+5	0.92	Medium	63
Midea D50-45FJ	Electric storage	50	45	+5	0.92	Medium	63
Midea MEWH50T82S1	Electric storage	50	45	+5	0.92	Medium	63
MRCOOL MEWH50T82S1	Electric storage	50	45	+5	0.92	Medium	63
Rheem XE50M12CS55U1	Electric storage	50	45	+5	0.92	Medium	63
Rheem XE50T12CS55U1	Electric storage	50	45	+5	0.92	Medium	63
Richmond XE50M12CS55U1	Electric storage	50	45	+5	0.92	Medium	63
Richmond XE50T12CS55U1	Electric storage	50	45	+5	0.92	Medium	63
Ruud XE50M12CS55U1	Electric storage	50	45	+5	0.92	Medium	63
Ruud XE50T12CS55U1	Electric storage	50	45	+5	0.92	Medium	63
Stream 33 S33-50TEWH-4500	Electric storage	50	45	+5	0.92	Medium	63
A. O. Smith ENT-50-1**	Electric storage	50	46	+4	0.92	Medium	62
American ENT-50-1**	Electric storage	50	46	+4	0.92	Medium	62
Lochinvar ENT-50-1**	Electric storage	50	46	+4	0.92	Medium	62
RELIANCE WATER HEATERS ENT-50-1**	Electric storage	50	46	+4	0.92	Medium	62
State ENT-50-1**	Electric storage	50	46	+4	0.92	Medium	62
U.S. Craftmaster ENT-50-1**	Electric storage	50	46	+4	0.92	Medium	62
AMERICAN STANDARD WATER HEATERS ENS50T-DR***	Electric storage	50	46	+4	0.92	Medium	61
Ariston ENS50T-DR***	Electric storage	50	46	+4	0.92	Medium	61
Lennox WHES050S45TD240S****	Electric storage	50	46	+4	0.92	Medium	61
AMERICAN STANDARD WATER HEATERS ENS50T-*	Electric storage	50	45	+5	0.92	Medium	60
Ariston ENS50T-*	Electric storage	50	45	+5	0.92	Medium	60
Lennox WHES050S45TN240S****	Electric storage	50	45	+5	0.92	Medium	60
A. O. Smith ENS-50 1**	Electric storage	50	46	+4	0.92	Medium	57
American ENS-50 1**	Electric storage	50	46	+4	0.92	Medium	57
Lochinvar ENS-50 1**	Electric storage	50	46	+4	0.92	Medium	57
RELIANCE WATER HEATERS ENS-50 1**	Electric storage	50	46	+4	0.92	Medium	57
State ENS-50 1**	Electric storage	50	46	+4	0.92	Medium	57
U.S. Craftmaster ENS-50 1**	Electric storage	50	46	+4	0.92	Medium	57
Hubbell ME50	Electric storage	50	47	+3	0.92	Medium	56
VAUGHN ME50	Electric storage	50	47	+3	0.92	Medium	56
VAUGHN THERMAL ME50	Electric storage	50	47	+3	0.92	Medium	56
RELIANCE WATER HEATERS EELBU-50 1**	Electric storage	50	44	+6	0.92	Medium	55
Rheem PROE50 2 RH95 MH	Electric storage	50	45	+5	0.92	Medium	55
HEAT-FLO SSL-50D	Electric storage	50	51	−1	0.92	Medium	54
Lennox WHES050L45SN240B****	Electric storage	50	42	+8	0.92	Medium	52
American ENL-50 1**	Electric storage	50	48	+2	0.92	Medium	51
Lochinvar ENLB-50W 1**	Electric storage	50	44	+6	0.91	Low	40
A. O. Smith ENL-50 1**	Electric storage	51	48	+3	0.92	Medium	51
Lochinvar ENL-50 1**	Electric storage	51	48	+3	0.92	Medium	51
RELIANCE WATER HEATERS ENL-50 1**	Electric storage	51	48	+3	0.92	Medium	51
State ENL-50 1**	Electric storage	51	48	+3	0.92	Medium	51
U.S. Craftmaster ENL-50 1**	Electric storage	51	48	+3	0.92	Medium	51
AMERICAN STANDARD WATER HEATERS ELV0552****	Electric storage	55	55	0	0.94	High	77
Ariston ELV0552****	Electric storage	55	55	0	0.94	High	77
HTP ELV0552****	Electric storage	55	55	0	0.94	High	77
HTP ELV055C2X045NDR	Electric storage	55	55	0	0.94	High	77
A. O. Smith PETX-55 1**	Electric storage	55	55	0	0.94	High	76
American PETX-55 1**	Electric storage	55	55	0	0.94	High	76
RELIANCE WATER HEATERS PETX-55 1**	Electric storage	55	55	0	0.94	High	76
State PETX-55 1**	Electric storage	55	55	0	0.94	High	76
A. O. Smith HETF-55 1**	Electric storage	55	55	0	0.94	High	75
American HETF-55 1**	Electric storage	55	55	0	0.94	High	75
Lochinvar HETF-55 1**	Electric storage	55	55	0	0.94	High	75
RELIANCE WATER HEATERS HETF-55 1**	Electric storage	55	55	0	0.94	High	75
State HETF-55 1**	Electric storage	55	55	0	0.94	High	75
Bradford White RE255T-****	Electric storage	55	55	0	0.93	High	75
A. O. Smith ENT-55 1**	Electric storage	55	55	0	0.93	Medium	72
American ENT-55 1**	Electric storage	55	55	0	0.93	Medium	72
Lochinvar ENT-55 1**	Electric storage	55	55	0	0.93	Medium	72
RELIANCE WATER HEATERS ENT-55 1**	Electric storage	55	55	0	0.93	Medium	72
State ENT-55 1**	Electric storage	55	55	0	0.93	Medium	72
Friedrich XE55T12CS55U0	Electric storage	55	55	0	0.92	Medium	74
Rheem XE55T12CS55U0	Electric storage	55	55	0	0.92	Medium	74
Richmond XE55T12CS55U0	Electric storage	55	55	0	0.92	Medium	74
Ruud XE55T12CS55U0	Electric storage	55	55	0	0.92	Medium	74
Friedrich PROE55 T2 RH94	Electric storage	55	55	0	0.92	Medium	72
Rheem PROE55 T2 RH94	Electric storage	55	55	0	0.92	Medium	72
Ruud PROE55 T2 RH94	Electric storage	55	55	0	0.92	Medium	72
A. O. Smith EETU-55W 1**	Electric storage	55	55	0	0.92	Medium	64
American EETU-55W 1**	Electric storage	55	55	0	0.92	Medium	64
Hubbell ME55	Electric storage	55	52	+3	0.92	Medium	64
Lochinvar EETU-55W 1**	Electric storage	55	55	0	0.92	Medium	64
RELIANCE WATER HEATERS EETU-55W 1**	Electric storage	55	55	0	0.92	Medium	64
State EETU-55W 1**	Electric storage	55	55	0	0.92	Medium	64
VAUGHN ME55	Electric storage	55	52	+3	0.92	Medium	64
VAUGHN THERMAL ME55	Electric storage	55	52	+3	0.92	Medium	64
Hubbell MP55F	Electric storage	55	54	+1	0.92	Medium	58
VAUGHN MP55F	Electric storage	55	54	+1	0.92	Medium	58
VAUGHN THERMAL MP55F	Electric storage	55	54	+1	0.92	Medium	58

Size is the size the model is sold as. UEF is the uniform energy factor. A UEF compares only between models with the same draw pattern. A range means the models under one basic model differ. A dash means no such figure.

More electric storage water heaters

Updated Oct 2, 2026 · Methodology

Not covered

Price, warranty, and installation.
Models whose size as sold is not known. They are on the full list.