Ruud water heaters

163 basic models and 287 listed models.

Ruud against Rheem, in figures

Ruud basic models and their certified figures
Basic model	Type	Storage volume (gal)	UEF	Flow at a 67°F rise (gal/min)	First-hour rating (gal)	Recovery efficiency	Model numbers
88H40*	Tabletop	36	0.81	—	50	98%	PET40*
CPROPH40 T2 CD375-30	Heat pump	36	3.83	—	60	434%	CPROPH40 T2 CD375-30
CPROPH40 T2 CD375-SO	Heat pump	36	3.83	—	60	434%	CPROPH40 T2 CD375-SO
CPROPH50 T2 CD375-30	Heat pump	45	3.88	—	67	430%	CPROPH50 T2 CD375-30
CPROPH50 T2 CD375-SO	Heat pump	45	3.88	—	67	430%	CPROPH50 T2 CD375-SO
CPROPH65 T2 CD375-30	Heat pump	59	4.05	—	75	457%	CPROPH65 T2 CD375-30
CPROPH65 T2 CD375-SO	Heat pump	59	4.05	—	75	457%	CPROPH65 T2 CD375-SO
CPROPH80 T2 CD375-30	Heat pump	72	4.07	—	87	447%	CPROPH80 T2 CD375-30
CPROPH80 T2 CD375-SO	Heat pump	72	4.07	—	87	447%	CPROPH80 T2 CD375-SO
MR30245 C	Electric storage	28	0.88	—	37–38	98%	MR30238 C-, MR30245 C-
MR40245 C	Electric storage	37	0.92	—	51	98%	MR40245 C-*
MR50245 C	Electric storage	50	0.91	—	57	98%	MR50245 C-*
MRG105245	Grid-enabled	101	0.90	—	83	98%	MRG105238-, MRG105245-
MRG85238	Grid-enabled	84	0.92	—	76	98%	MRG85238-*
MRG85245	Grid-enabled	84	0.92	—	77	98%	MRG85245-*
MSR50245 C	Electric storage	48	0.90	—	41	98%	MSR50245 C-*
PRO H40 T2 RU310BM	Heat pump	36	3.50	—	60	423%	PRO H40 T2 RU310BM
PRO H40 T2 RU310UM	Heat pump	36	3.50	—	60	430%	PRO H40 T2 RU310UM
PRO H50 T2 RU310BM	Heat pump	45	3.50	—	67	400%	PRO H50 T2 RU310BM
PRO H50 T2 RU310UM	Heat pump	45	3.50	—	67	400%	PRO H50 T2 RU310UM
PRO H65 T2 RU310BM	Heat pump	59	3.50	—	75	409%	PRO H65 T2 RU310BM
PRO H65 T2 RU310UM	Heat pump	59	3.50	—	75	409%	PRO H65 T2 RU310UM
PRO H80 T2 RU310BM	Heat pump	72	3.50	—	87	398%	PRO H80 T2 RU310BM
PRO H80 T2 RU310UM	Heat pump	72	3.50	—	87	398%	PRO H80 T2 RU310UM
PRO+G38-40N RH69 PD	Gas storage	37	0.68	—	66	77%	PRO+G38-36P RU69 PD, PRO+G38-40N RU69 PD, PROUG38-36P RU69 PD, PROUG38-40N RU69 PD
PRO+G40-38U RH67 PD*	Gas storage	38	0.64	—	67	75%	PRO+G40-38U RU67 PD*
PRO+G40S-40N RH67 PD	Gas storage	39	0.65	—	69	75%	PRO+G40S-36P RU67 PD
PRO+G50-38U RH67 PD*	Gas storage	48	0.68	—	86	78%	PRO+G50-38U RU67 PD, PROUG50-38U RU67 PD
PRO+G50-40N RH67 PD	Gas storage	48	0.69	—	79	77%	PRO+G50-40N RU67 PD, PROUG50-36P RU67 PD, PROUG50-40N RU67 PD
PRO+G50-47P RH62 PDV	Gas storage	48	0.65	—	81	72%	GPDV50-65LP, PRO+G50-47P RU62 PDV
PRO+G50-65N RH62 PDV	Gas storage	48	0.65	—	111	72%	GPDV50-65, PRO+G50-65N RU62 PDV
PRO+G50S-40N RH67 PD	Gas storage	48	0.69	—	78	77%	PRO+G50S-36P RU67 PD, PRO+G50S-40N RU67 PD
PRO+G55-45U RH59 EC1*	Gas storage	55	0.62	—	99	76%	PRO+G55-45U RU59 EC1*
PRO+G55-50N RH59	Gas storage	55	0.62	—	91	75%	PH2-55-50F1, PRO+G55-45P RU59, PRO+G55-50N RU59
PROE28 S2 RH93 SB	Electric storage	26	0.92	—	48	98%	PROE28 S2 RU93 SB
PROE28 S2 RH93 SB-HO	Electric storage	26	0.94	—	53	98%	PROE28 S2 RU93 SB-HO
PROE28 S2 RH95	Electric storage	25	0.92	—	45	98%	ELDS30-FTB, ELDS30-TB, PROE28 S1 RU95, PROE28 S2 RU95
PROE28 S2 RH95 B	Electric storage	26	0.92	—	45	98%	PROE28 S2 RU95 B
PROE30 T2 RH95	Electric storage	27	0.92	—	44	98%	ELD30-FTB, ELD30-TB, M3E30-2, PROE30 T1 RU95, PROE30 T2 RU95
PROE36 S2 RH CG	Electric storage	33	0.92	—	51	98%	PROE36 S2 RU CG
PROE36 S2 RH95	Electric storage	33	0.92	—	46	98%	ELDS40-FTB, ELDS40-TB
PROE38 S2 RH BCG	Electric storage	35	0.92	—	51	98%	PROE38 S2 RU BCG
PROE38 S2 RH93 SB	Electric storage	35	0.94	—	59	98%	PROE38 S2 RU93 SB
PROE38 S2 RH93 SB-LO	Electric storage	35	0.93	—	42	98%	PROE38 S2 RU93 SB-LO
PROE38 S2 RH95 B	Electric storage	35	0.92	—	51	98%	PROE38 S2 RU95 B
PROE40 M2 RH95	Electric storage	36	0.93	—	55	98%	ELD40-FTB, ELD40-TB, M3E40, PRO+E40 M2 RU CG, PRO+E40 M2 RU93 CL, PROE40 M1 RU95, PROE40 M2 RU CG, PROE40 M2 RU95, PROUE40 M2 RU CG, PROUE40 M2 RU93 CS
PROE40 T2 RH CG	Electric storage	36	0.92	—	55	98%	PROE40 T2 RU CG
PROE40 T2 RH95	Electric storage	36	0.93	—	55	98%	M3MH40, PROE40 T1 RU95, PROE40 T2 RU95
PROE47 S2 RH CG	Electric storage	43	0.92	—	54	98%	PROE47 S2 RU CG
PROE47 S2 RH95	Electric storage	43	0.93	—	54	98%	ELDS52-FTB, ELDS52-TB
PROE50 M2 RH95	Electric storage	45	0.93	—	62	98%	M3ME52, PROE50 M1 RU95, PROE50 M2 RU95
PROE50 T2 RH95	Electric storage	45	0.93	—	63	98%	ELD52-FTB, ELD52-TB, M3E52, PE3R-52-2 N3, PROE50 T1 RU95, PROE50 T2 RU95
PROE55 T2 RH94	Electric storage	55	0.92	—	72	98%	M3E55, PROE55 T2 RU94
PROG29-30U RH63 EC1*	Gas storage	28	0.60	—	51	78%	M4-30FN, PRO+G29-30U RU63 EC1, PROG29-30U RU63 EC1*
PROG29-31U RH EC1	Gas storage	28	0.60	—	58	74%	PROG29-31U RU EC1
PROG29-32N RH63 *	Gas storage	28	0.60	—	63	74%	PROG29-30P RU63
PROG30S-30N RH63	Gas storage	29	0.60	—	51	75%	PROG30S-30N RU63
PROG39S-38U RH62 EC1*	Gas storage	37	0.59	—	68	75%	M4-40SFN, PROG39S-38U RU62 EC1
PROG40-30P RH62 DV	Gas storage	38	0.58	—	58	71%	PROG40-30P RU62 DV
PROG40-34U RH EC1	Gas storage	38	0.59	—	71	75%	PROG40-34U RU EC1, PROG40-34U RU EC1 TT
PROG40-36P RH67 PV	Gas storage	38	0.68	—	71	79%	PROG40-36P RU67 PV
PROG40-36U RH67 PV*	Gas storage	39	0.64	—	67	74%	PROG40-36U RU67 PV*
PROG40-38N RH62	Gas storage	38	0.58	—	64	74%	M2-40F2, PROG40-36N RU62, PROG40-38N RU62, PROG40-38N RU62 TT
PROG40-38U RH62 EC1*	Gas storage	38	0.58	—	71	76%	M4-40FN, PRO+G40-38U RU62 EC1 TT, PRO+G40-38U RU62 EC1, PROG40-38U RU62 EC1 TT, PROG40-38U RU62 EC1*
PROG40-40N RH62	Gas storage	38	0.66	—	84	80%	PH2R40-36PF3, PH2R40-40F*, PH2R40-40F3, PRO+G40-36P RU AX, PRO+G40-36P RU62, PRO+G40-40N RU AX, PRO+G40-40N RU62, PROG40-36P RU AX, PROG40-36P RU62, PROG40-40N RU AX, PROG40-40N RU62, PROG40-40N RU62 TT
PROG40-40N RH67 PDV	Gas storage	38	0.63	—	67	79%	PROG40-38P RU67 PDV, PROG40-40N RU67 PDV
PROG40-40N RH67 PV	Gas storage	38	0.70	—	79	76%	PROG40-40N RU67 PV
PROG40S-34N RH62 *	Gas storage	38	0.59	—	65	75%	M2-40SF1 , PROG40S-31P RU62, PROG40S-34N RU62
PROG40S-36N RH67 PV	Gas storage	39	0.65	—	66	74%	PROG40S-32P RU67 PV, PROG40S-36N RU67 PV
PROG40S-38N RH62	Gas storage	39	0.58	—	65	77%	PROG40S-35P RU62, PROG40S-38N RU62
PROG40S-40N RH62	Gas storage	39	0.58	—	66	75%	P2R-40SPF, PRO+G40S-36P RU62, PRO+G40S-40N RU62, PROG40S-36P RU62, PROG40S-40N RU62
PROG48-48U RH EC1	Gas storage	46	0.64	—	88	77%	PROG48-48U RU EC1
PROG50-34U RH EC1	Gas storage	48	0.63	—	80	79%	PROG50-34U RU EC1, PROG50-34U RU EC1 TT
PROG50-38N RH60 *	Gas storage	48	0.64	—	85	83%	M2-50F2 , M2-50PF2, PROG50-38N RU60 , PROG50-38N RU60 TT
PROG50-38U RH60 EC1*	Gas storage	48	0.63	—	86	83%	M4-50FN, PRO+G50-38U RU62 EC1, PROG50-38U RU60 EC1 TT, PROG50-38U RU60 EC1
PROG50-38U RH62 EC1*	Gas storage	48	0.64	—	84	79%	PRO+G50-38U RU62 EC1 TT, PROG50-38U RU62 EC1
PROG50-38U RH67 PV*	Gas storage	48	0.68	—	86	77%	PROG50-38U RU67 PV*
PROG50-40N RH62	Gas storage	48	0.65	—	76	81%	PH2R50-36PF3, PRO+G50-36P RU62, PRO+G50-40N RU62, PROG50-36P RU62, PROG50-40N RU62, PROG50-40N RU62 TT
PROG50-40N RH67 PDV	Gas storage	47	0.69	—	82	81%	PROG50-40N RU67 PDV, PROG50-40P RU67 PDV
PROG50-42N RH67 PV	Gas storage	48	0.68	—	78	75%	PROG50-42N RU PV AX, PROG50-42N RU67 PV, PROG50-42P RU PV AX, PROG50-42P RU67 PV
PROG50S-36N RH67 PV	Gas storage	48	0.70	—	78	79%	PROG50S-32P RU67 PV, PROG50S-36N RU67 PV
PROG50S-40N RH61	Gas storage	48	0.63	—	87	75%	PH2-50SF1, PH2-50SPF1, PRO+G50S-36P RU61, PRO+G50S-40N RU61, PROG50S-36P RU61, PROG50S-40N RU61
PROG50S-40U RH60 EC1*	Gas storage	48	0.63	—	85	83%	PROG50S-40U RU60 EC1*
PROP G40-50* RH HE EC3	Gas storage	40	0.90	—	88	97%	PRO+G40-50P RU HE EC1, PRO+G40-50U RU HE EC1, PROU G40-50* RU HE EC3
PROP G50-100* RH HE EC3	Gas storage	50	0.89	—	167	96%	PROU G50-100* RU HE EC3
PROP G50-50* RH HE EC3	Gas storage	50	0.88	—	95	94%	PRO+G50-50P RU HE EC1, PRO+G50-50U RU HE EC1, PROU G50-50* RU HE EC3
PROP G50-76* RH HE EC3	Gas storage	50	0.89	—	136	95%	PROU G50-76* RU HE EC3, PROU G50-76P CD HE, PROU G50-76U CD HE
PROPG75-100U RH HE EC3	Gas storage	75	0.88	—	199	95%	PROUG75-100P RU HE EC3, PROUG75-100U RU HE EC3
PROPH40 T0 RH120	Heat pump	37	2.59	—	43	355%	PROUH40 T0 RU120
PROPH40 T0 RH120-M	Heat pump	36	2.80	—	45	387%	PROUH40 T0 RU120-M, PROUH40 T0 RU120-MSO
PROPH50 T0 RH120	Heat pump	46	3.00	—	51	350%	PROUH50 T0 RU120
PROPH50 T0 RH120-M	Heat pump	46	3.00	—	55	367%	PROUH50 T0 RU120-M, PROUH50 T0 RU120-MSO
PROPH50 T2 RH375-SO	Heat pump	45	3.88	—	67	430%	HPLD50-1RU, HPLD50-2RU, PROUH50 T2 RU375-30, PROUH50 T2 RU375-SO, PROUH50 T2 RU400-30, PROUH50 T2 RU400-SO
PROPH50 T2 RH400-30	Heat pump	45	3.88	—	67	430%	HPLD50-1RU, HPLD50-2RU, PROUH50 T2 RU375-30, PROUH50 T2 RU375-SO, PROUH50 T2 RU400-30, PROUH50 T2 RU400-SO, PROUH50 T2 RU400-Z30
PROPH65 T0 RH120-M	Heat pump	59	3.12	—	63	398%	PROUH65 T0 RU120-M, PROUH65 T0 RU120-MSO
PROPH80 T0 RH120-M	Heat pump	72	3.46	—	84	393%	PROUH80 T0 RU120-M, PROUH80 T0 RU120-MSO
PROPH80 T2 RH375-SO	Heat pump	72	4.07	—	87	447%	HPLD80-1RU, HPLD80-2RU, PROUH80 T2 RU375-30, PROUH80 T2 RU375-SO, PROUH80 T2 RU400-30, PROUH80 T2 RU400-SO
PROPH80 T2 RH400-30	Heat pump	72	4.07	—	87	447%	HPLD80-1RU, HPLD80-2RU, PROUH80 T2 RU375-30, PROUH80 T2 RU375-SO, PROUH80 T2 RU400-30, PROUH80 T2 RU400-SO, PROUH80 T2 RU400-Z30
PROUH40 T2 CD400-15	Heat pump	36	3.45	—	46	432%	PROUH40 T2 CD400-15
PROUH40 T2 CD400-30	Heat pump	36	3.83	—	60	434%	PROUH40 T2 CD400-30
PROUH40 T2 CD400-SO	Heat pump	36	3.83	—	60	434%	PROUH40 T2 CD400-SO
PROUH40 T2 RU350BM	Heat pump	36	3.50	—	60	423%	PROUH40 T2 RU350BM
PROUH40 T2 RU350UM	Heat pump	36	3.50	—	60	423%	PROUH40 T2 RU350UM
PROUH40 T2 RU375-15	Heat pump	36	3.45	—	46	432%	PROUH40 T2 RU375-15
PROUH40 T2 RU375-30	Heat pump	36	3.83	—	60	434%	PROUH40 T2 RU375-30
PROUH40 T2 RU375-SO	Heat pump	36	3.83	—	60	434%	PROUH40 T2 RU375-SO
PROUH40 T2 RU400-15	Heat pump	36	3.45	—	46	432%	PROUH40 T2 RU400-15
PROUH40 T2 RU400-30	Heat pump	36	3.83	—	60	434%	PROUH40 T2 RU400-30
PROUH40 T2 RU400-SO	Heat pump	36	3.83	—	60	434%	PROUH40 T2 RU400-SO
PROUH40 T2 RU400-Z30	Heat pump	36	3.83	—	60	434%	PROUH40 T2 RU400-Z30
PROUH50 T2 CD400-15	Heat pump	45	3.75	—	52	423%	PROUH50 T2 CD400-15
PROUH50 T2 CD400-30	Heat pump	45	3.88	—	67	430%	PROUH50 T2 CD400-30
PROUH50 T2 CD400-SO	Heat pump	45	3.88	—	67	430%	PROUH50 T2 CD400-SO
PROUH50 T2 RU350BM	Heat pump	45	3.50	—	67	400%	PROUH50 T2 RU350BM
PROUH50 T2 RU350UM	Heat pump	45	3.50	—	67	400%	PROUH50 T2 RU350UM
PROUH50 T2 RU375-15	Heat pump	45	3.75	—	52	423%	PROUH50 T2 RU375-15
PROUH50 T2 RU400-15	Heat pump	45	3.75	—	52	423%	PROUH50 T2 RU400-15
PROUH65 T2 CD400-15	Heat pump	59	3.55	—	54	407%	PROUH65 T2 CD400-15
PROUH65 T2 CD400-30	Heat pump	59	4.05	—	75	457%	PROUH65 T2 CD400-30
PROUH65 T2 CD400-SO	Heat pump	59	4.05	—	75	457%	PROUH65 T2 CD400-SO
PROUH65 T2 RU350BM	Heat pump	59	3.50	—	75	409%	PROUH65 T2 RU350BM
PROUH65 T2 RU350UM	Heat pump	59	3.50	—	75	409%	PROUH65 T2 RU350UM
PROUH65 T2 RU375-15	Heat pump	59	3.55	—	54	407%	PROUH65 T2 RU375-15
PROUH65 T2 RU375-30	Heat pump	59	4.05	—	75	457%	PROUH65 T2 RU375-30
PROUH65 T2 RU375-SO	Heat pump	59	4.05	—	75	457%	PROUH65 T2 RU375-SO
PROUH65 T2 RU400-15	Heat pump	59	3.55	—	54	407%	PROUH65 T2 RU400-15
PROUH65 T2 RU400-30	Heat pump	59	4.05	—	75	457%	PROUH65 T2 RU400-30
PROUH65 T2 RU400-SO	Heat pump	59	4.05	—	75	457%	PROUH65 T2 RU400-SO
PROUH65 T2 RU400-Z30	Heat pump	59	4.05	—	75	457%	PROUH65 T2 RU400-Z30
PROUH80 T2 CD400-15	Heat pump	72	3.70	—	67	445%	PROUH80 T2 CD400-15
PROUH80 T2 CD400-30	Heat pump	72	4.07	—	87	447%	PROUH80 T2 CD400-30
PROUH80 T2 CD400-SO	Heat pump	72	4.07	—	87	447%	PROUH80 T2 CD400-SO
PROUH80 T2 RU350BM	Heat pump	72	3.50	—	87	398%	PROUH80 T2 RU350BM
PROUH80 T2 RU350UM	Heat pump	72	3.50	—	87	398%	PROUH80 T2 RU350UM
PROUH80 T2 RU375-15	Heat pump	72	3.70	—	67	445%	PROUH80 T2 RU375-15
PROUH80 T2 RU400-15	Heat pump	72	3.70	—	67	445%	PROUH80 T2 RU400-15
RHE40S	Gas storage	37	0.83	—	87	92%	PHE40S
RHE40SP	Gas storage	37	0.75	—	68	87%	PHE40SP
RHE50	Gas storage	46	0.80	—	87	89%	PHE50, PHE50P
RTG-70DVLN-3	Gas tankless	—	0.82	4.0	—	84%	RUTG-70DVLN-3, RUTG-70DVLP-3, RUTG-R70DVELN-3, RUTG-R70DVELP-3
RTG-70XLN-1	Gas tankless	—	0.81	4.0	—	84%	RUTG-70XLN-1, RUTG-70XLNWA-1
RTG-70XLN-3	Gas tankless	—	0.82	4.0	—	84%	RUTG-70XLN-3, RUTG-70XLP-3, RUTG-R70XELN-3, RUTG-R70XELP-3
RTG-84DVLN-3	Gas tankless	—	0.82	4.5	—	84%	RUTG-84DVLN-3, RUTG-84DVLP-3
RTG-84XLN-1	Gas tankless	—	0.81	4.5	—	83%	RUTG-84XLN-1, RUTG-84XLNWA-1
RTG-84XLN-3	Gas tankless	—	0.82	4.4	—	85%	RUTG-84XLN-3, RUTG-84XLP-3
RTG-95DVLN-3	Gas tankless	—	0.82	4.8	—	83%	RUTG-95DVELN-3, RUTG-95DVELP-3, RUTG-95DVLN-3, RUTG-95DVLP-3, RUTG-R95DVELN-3, RUTG-R95DVELP-3
RTG-95XLN-1	Gas tankless	—	0.81	4.9	—	83%	RUTG-95XLN-1, RUTG-95XLNWA-1
RTG-95XLN-3	Gas tankless	—	0.82	4.8	—	84%	RUTG-95XELN-3, RUTG-95XELP-3, RUTG-95XLN-3, RUTG-95XLP-3, RUTG-R95XELN-3, RUTG-R95XELP-3
RTGH-68DVLN-3	Gas tankless	—	0.90	3.5	—	92%	RUTGH-68DVLN-3, RUTGH-68DVLP-3
RTGH-84DVLN-3	Gas tankless	—	0.93	4.5	—	94%	RUTGH-84DVLN-3
RTGH-90DVLN-3	Gas tankless	—	0.93	4.9	—	94%	RUTGH-90DVLN-3, RUTGH-90DVLP-3
RTGH-95DVLN-3	Gas tankless	—	0.93	5.5	—	95%	RUTGH-95DVELN-3, RUTGH-95DVELP-3, RUTGH-95DVLN-3, RUTGH-95DVLP-3
RTGH-C95DVLN	Gas tankless	—	0.93	5.7	—	96%	RUTGH-C95DVLP, RUTGH-CM95DVLP
RTGH-C95XLN	Gas tankless	—	0.93	5.6	—	95%	RUTGH-C95XLN, RUTGH-CM95XLN
RTGH-S10I	Gas tankless	—	0.96	5.2	—	98%	RUTGH-S10I, RUTGH-SR10I
RTGH-S11I	Gas tankless	—	0.96	5.8	—	98%	CRUTGH-S11I, CRUTGH-SR11I, RUTGH-CS11I, RUTGH-CSR11I, RUTGH-S11I, RUTGH-SR11I
RTGH-S84I	Gas tankless	—	0.96	4.6	—	97%	RUTGH-S84I, RUTGH-SR84I
SCG40T03ST34U1	Gas storage	38	0.59	—	67	78%	M2-40PF2, PROG40-32P RU62
SFT 199-1	Gas tankless	—	0.90	5.3	—	93%	CRUTGH-L199, RUTGH-L199
XE50M12CS55U1	Electric storage	45	0.92	—	63	98%	PRO+E50 M2 RU CG, PRO+E50 M2 RU92 CL, PROE50 M2 RU CG, PROUE50 M2 RU CG, PROUE50 M2 RU92 CS
XE50T12CS55U1	Electric storage	45	0.92	—	63	98%	PRO+E50 T2 RU CG, PRO+E50 T2 RU92 CL, PROE50 T2 RU CG, PROUE50 T2 RU CG, PROUE50 T2 RU92 CS
XE55T12CS55U0	Electric storage	55	0.92	—	74	98%	PRO+E55 T2 RU CG, PRO+E55 T2 RU92 CL, PROE55 T2 RU CG, PROUE55 T2 RU CG, PROUE55 T2 RU92 CS
XG29T12XR60U0	Gas storage	28	0.71	—	93	78%	PRO+G29-60N RU70 ID

A range means the models under one basic model differ. A dash means the model has no such figure.

This brand's highest UEF, the energy that reaches the water for each unit used, is 4.07. That UEF is over 1 because heat pumps move heat from air into water. Of this brand's basic models, 6 share the highest UEF, the CPROPH80 T2 CD375-30 among them. Of its 163 basic models, 71 list an ENERGY STAR certified model.

This brand lists 6 kinds: heat pump, gas storage, electric storage, gas tankless, grid-enabled, and tabletop. The PROPG75-100U RH HE EC3 holds this brand's highest first-hour rating: 199 gallons. Part of those 199 gallons is water warmed as the tank drains. Without a tank, the RTGH-S11I gives this brand's highest flow. The test warms the water by 67°F at 5.8 gallons per minute.

On this site, 6 of the 117 brands list more model numbers than this one. Each of 7 other brands shares at least one basic model number with this brand. Of those, Rheem lists the most: 99 of this brand's 163.

Basic models shared with other brands

Ruud basic models also listed under another brand
Brand	Shared basic models
Rheem	99
Richmond	90
Friedrich	80
MARATHON	7
ECOSENSE	3
SURE COMFORT	2
IBC Technologies	1

Ruud against Rheem, in figures

Updated Oct 26, 2026 · Methodology

Ruud water heaters

Certified figures by basic model

Basic models shared with other brands