American water heaters

163 basic models and 396 listed models.

American 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
ACTH-199M-(N,P) 1**	Gas tankless	—	0.95	5.8	—	97%	MCTH-199M-(N,P) 1**
ATHR-160M 1**	Gas tankless	—	0.95	4.8	—	98%	MTHR-160M 1, MTHR-160X3 1
ATHR-180M 1**	Gas tankless	—	0.95	5.3	—	97%	MTHR-180M 1, MTHR-180X3 1
ATHR-199M 1**	Gas tankless	—	0.95	5.9	—	98%	MTHR-199M 1, MTHR-199X3 1
ATI-140B-N 1**	Gas tankless	—	0.81	3.6	—	84%	MTI-140B-N, MTI-140X3-N
ATI-180B-N 1**	Gas tankless	—	0.82	4.7	—	84%	MTI-180B-N 1, MTI-180X3-N 1
ATI-199B-N 1**	Gas tankless	—	0.82	5.2	—	85%	MTI-199B-N 1, MTI-199X3-N 1
ATM-140M-N 1**	Gas tankless	—	0.95	4.1	—	97%	MTM-140M-N 1, MTM-140X3-N 1
ATM-160M-N 1**	Gas tankless	—	0.95	4.8	—	96%	MTM-160M-N 1*, MTM-160M-P 11, MTM-160X3-N 1*, MTM-160X3-P 11
ATM-180M-N 1**	Gas tankless	—	0.95	5.4	—	96%	MTM-180M-N 1*, MTM-180M-P 11, MTM-180X3-N 1*, MTM-180X3-P 11
ATM-199M-N 1**	Gas tankless	—	0.95	6.0	—	96%	MTM-199M-N 1*, MTM-199M-P 11, MTM-199X3-N 1*, MTM-199X3-P 11
ATO-140B-N 1**	Gas tankless	—	0.81	3.6	—	84%	MTO-140B-N, MTO-140X3-N
ATO-180B-N 1**	Gas tankless	—	0.82	4.7	—	86%	MTO-180B-N 1, MTO-180X3-N 1
ATO-199B-N 1**	Gas tankless	—	0.82	5.0	—	86%	MTO-199B-N 1, MTO-199X3-N 1
E62-38T-045DV 1**	Tabletop	35	0.90	—	55	98%	E2F38TD045V 1, E62-38T-045DV 1
EELBU-50 1**	Electric storage	44	0.92	—	55	98%	EE6U-50LB 1**
EETU-55W 1**	Electric storage	55	0.92	—	64	98%	EE6U-55HW 1**
ENJ-30 1**	Electric storage	26	0.91	—	43	98%	E6N-30LS 1**
ENJ-40 1**	Electric storage	35	0.93	—	54	98%	E6N-40LS 1**
ENJ-40W 1**	Electric storage	35	0.91	—	38	98%	E6N-40LW 1**
ENJB-30 1**	Electric storage	26	0.90	—	47	98%	E6N30LBS 1, MHE6-30L-035D 1, MHE6-30L-045D 1**
ENJB-40 1**	Electric storage	35	0.94	—	57	98%	E6N-40LBS 1**
ENL-30 1**	Electric storage	26	0.90	—	44	98%	E10N-30L 1, E6N-30L 1
ENL-36 2**	Electric storage	33	0.92	—	51	98%	E6N-36L 2, LDCE32-30L-045DV 2, LDCE32-30L-060DV 2**
ENL-40 1**	Electric storage	35	0.89	—	50	98%	E6N-40L 1**
ENL-50 1**	Electric storage	48	0.92	—	51	98%	E6N-50L 1, LDCE32-50L-040DV 1, LDCE32-50L-045DV 1, LDCE32-50L-050DV 1, LDCE32-50L-055DV 1, LDCE32-50L-060DV 1
ENLB-30 1**	Electric storage	26	0.89	—	43	98%	E10N-30LB 1, E6N-30LB 1, NE3F30LBD 1**
ENLB-40 1**	Electric storage	35	0.92	—	51	98%	E6N-40LB 1, LDCE32-40L-045DV 1, LDCE32-40L-050DV 1, LDCE32-40L-055DV 1, LDCE32-40L-060DV 1, NE3F40LBD 1
ENLB-40W 1**	Electric storage	35	0.90	—	38	98%	E6N-40LBW 1**
ENLB-50 1**	Electric storage	44	0.93	—	60	98%	E10N-50LB 1, E6N-50LB 1, E6N50LB 1**
ENS-30 1**	Electric storage	27	0.89	—	47	98%	E10N-30R 1, E6N-30R 1
ENS-40 1**	Electric storage	37	0.92	—	55	98%	E10N-40R 1, E6N-40R 1, E8N-40R 1, LDCE32-30R-045DV 1, LDCE32-30R-050DV 1, LDCE32-30R-055DV 1, LDCE32-30R-060DV 1, NE3F40RD 1*
ENS-40W 1**	Electric storage	37	0.88	—	41	98%	E6N-40RW 1**
ENS-50 1**	Electric storage	46	0.92	—	57	98%	E10N-50R 1, E6N-50R 1, E8N-50R 1**
ENSB-30 1**	Electric storage	27	0.91	—	50	98%	E6N-30RB 1**
ENT-40 1**	Electric storage	36	0.92	—	53	98%	E10N-40H 1, E6N-40H 1, E8N-40H 1**
ENT-50-1**	Electric storage	46	0.92	—	62	98%	E10N-50H 1, E10N-50H-1, E6N-50H 1, E6N-50H-1, E8N-50H 1, E8N-50H-1, LDCE32-40R-030DV 1, LDCE32-40R-040DV 1, LDCE32-40R-045DV 1, LDCE32-40R-050DV 1, LDCE32-40R-055DV 1, LDCE32-40R-060DV 1, NE3F50HD 1**
ENT-55 1**	Electric storage	55	0.93	—	72	98%	E10N-55H 1, E6N-55H 1, E8N-55H 1, LDCE32-50R-030DV 1, LDCE32-50R-040DV 1, LDCE32-50R-045DV 1, LDCE32-50R-050DV 1, LDCE32-50R-055DV 1, LDCE32-50R-060DV 1**
FMDV-30 2**	Gas storage	29	0.61	—	60	78%	MHDV-62-30T30 2**
FMDV-40 2**	Gas storage	38	0.59	—	57	76%	MHDV-62-40T32 2**
FMDV-50 2**	Gas storage	47	0.57	—	67	77%	MHDV-62-50T40 2**
FMHR-30 4**	Gas storage	29	0.60	—	63	79%	MHG62-30T35R 4**
FMHR-40 4**	Gas storage	38	0.58	—	59	78%	MHG62-40T35R 4**
FPTU-50 1**	Heat pump	46	3.35	—	66	407%	HPHE6250H045DV 1**
FPTU-66 1**	Heat pump	67	3.42	—	79	265%	HPHE6266H045DV 1**
FPTU-80 1**	Heat pump	82	3.45	—	84	233%	HPHE6280H045DV 1**
G6-US4040NV 5**	Gas storage	38	0.64	—	83	75%	GU6240S40 5**
G6-UT3030NVR 5**	Gas storage	29	0.60	—	67	76%	GU6130T30 5**
G6N-UT4040NVR 5**	Gas storage	38	0.64	—	83	74%	GU101-40T40R 5, GU61-40T40R 5, GU81-40T40R 5**
G6N-UT5040NVR 5**	Gas storage	48	0.63	—	76	77%	GU61-50T40R 5, GU81-50T40R 5
G9-UT4040NVR 5**	Gas storage	38	0.64	—	83	77%	GU62-40T40R 5, GU82-40T40R 5
G9-UT5040NVR 5**	Gas storage	48	0.64	—	78	77%	GU62-50T40R 5, GU82-50T40R 5
GCB-30R 4**	Gas storage	29	0.60	—	62	74%	GB61-30T32R 4*, GB61-30T32R 41
GCB-40 4**	Gas storage	38	0.64	—	78	77%	GB61 40T40 4*, GB61 40T40 41
GCBL-40 4**	Gas storage	38	0.57	—	68	75%	GB61 40S40 4*, GB61 40S40 41
GCF-40 1**	Gas storage	38	0.64	—	70	73%	FDG2F4040T3NVR 1, FDG6240T403NVR 1, FDG6240T403PVR 1*1
GCF-50 1**	Gas storage	48	0.69	—	84	80%	FDG2F5040T3NVR 1, FDG6250T403NVR 1, FDG6250T403PVR 1*1
GCFL-40 1**	Gas storage	38	0.66	—	65	77%	FDG2F4040S3NVR 1*, FDG2F4040S3PVR 11, FDG6240S403NVR 1*, FDG6240S403PVR 11
GCFL-50 1**	Gas storage	49	0.69	—	78	79%	FDG6250S403NOV 1**
GCG-50 4**	Gas storage	48	0.62	—	81	79%	G101-50T40R 4*, G101-50T40R 41, G61-50T40R 4*, G61-50T40R 41, G61-50T40RL 4*, G61-50T40RL 41, G81-50T40R 4*, G81-50T40R 41
GCGH-50 2**	Gas storage	48	0.63	—	76	77%	G61-50-T38 21, G61-50T38 2*
GCR-30 2**	Gas storage	29	0.63	—	63	77%	G62 30T35 2*, G62-30T35 21
GCR-30R 2**	Gas storage	29	0.61	—	52	74%	G62-30T30R 2*, G62-30T30R 21
GCR-30R 4**	Gas storage	29	0.60	—	62	73%	G62-30T32R 4*, G62-30T32R 41
GCR-40 2**	Gas storage	38	0.64	—	80	74%	G62-40T40 2*, G62-40T40 21
GCR-40 410	Gas storage	38	0.64	—	80	78%	G102-40T40R 410, G102-40T40R 411, G62-40T40R 410, G62-40T40R 411, G62-40T40RL 410, G62-40T40RL 411, G82-40T40R 410, G82-40T40R 411, NG2F4040TR 410, NG2H4040TR 410, NG2J4040TR 410
GCR-50 2**	Gas storage	48	0.64	—	81	80%	G62 50T40 2*, G62-50T40 21, G6250T40 2**
GCR-50 4**	Gas storage	48	0.62	—	84	77%	G102-50T40R 4*, G102-50T40R 41, G62-50T40R 4*, G62-50T40R 41, G62-50T40RL 4*, G62-50T40RL 41, G82-50T40R 4*, G82-50T40R 41
GCRH-40 4**	Gas storage	38	0.59	—	65	80%	G62-40T35R 4**
GCRL-30R 4**	Gas storage	29	0.60	—	55	75%	G102-30S32R 4, G62-30S32R 4, G62-30S32R 4*1
GCRL-40 2**	Gas storage	38	0.58	—	64	74%	G62 40S40 2*, G62-40S40 21
GCRL-40 4**	Gas storage	38	0.58	—	67	78%	G102-40S40R 4, G62-40S40R 4, G62-40S40R 41, G82-40S40R 4, G82-40S40R 41, NG2H4040SR 4**
GCRL-50 2**	Gas storage	49	0.62	—	78	73%	G6250S40 2*, G6250S40 21
GCRL-50 4**	Gas storage	50	0.62	—	81	77%	G6250S40 4*, G6250S40 41, G82-50S40 4*, G82-50S40 41
GCRT-50 4**	Gas storage	48	0.61	—	89	77%	G102 50T50 4, G102 50T50L 4, G62 50T50L 4, G62-50T50 4, G62-50T50 41, G62-50T50L 41, G82-50T50 4*, G82-50T50 41, G82-50T50L 4*, G82-50T50L 41
GCRX-50 2**	Gas storage	49	0.61	—	99	75%	G102-50T60 2, G102-50T60L 2, G62-50T60 2*, G62-50T60 21, G62-50T60L 2*, G62-50T60L 21
GCRX-55 2**	Gas storage	55	0.62	—	83	74%	CG32 55T60 2*, CG32 55T60 21, G102-55T60 2, G6255T60 2, G6255T60 21, G6255T60L 2, G6255T60L 21, G82-55T60 2*, G82-55T60 21, G82-55T60L 2*, G82-55T60L 21
GDHE-75 3**	Gas storage	74	0.86	—	130	96%	VG6275T100V 3*
GDV-40 3**	Gas storage	39	0.60	—	64	75%	DVG6240S38NOLV 3, DVG6240S38NOV 3, DVG6240S38PLV 31, DVG6240S38PV 31, MHDVC62-40S38-3NV 3*, MHDVC62-40S38-3PV 31
GDV-50 3**	Gas storage	48	0.66	—	77	79%	DVG6250T40NOLV 3, DVG6250T40NOV 3, DVG6250T40PLV 31, DVG6250T40PV 31, MHDVC62-50T40-3NV 3*, MHDVC62-50T40-3PV 31
GDVNL-40L 1**	Gas storage	38	0.61	—	64	74%	UDG62-40S36-NV 1**
GDVNT-50L 1**	Gas storage	48	0.65	—	84	81%	UDG62-50T38-NV 1**
GDVT-50 3**	Gas storage	48	0.65	—	82	79%	DVG6250T47NOLV 3, DVG6250T47NOV 3, DVG6250T47PLV 31, DVG6250T47PV 31
GPCT-40L 1**	Gas storage	38	0.90	—	86	91%	PCG82-40S50L 1**
GPCX-50L 1**	Gas storage	49	0.90	—	118	92%	PCG82-50S65L 1**
GPDL-40 3**	Gas storage	38	0.68	—	74	79%	PDVG62-40S40-NV 3, PDVG62-40S40-NVL 3, PDVG62-40S40-PV 31, PDVG62-40S40-PVL 31
GPDNL-40 1**	Gas storage	38	0.70	—	75	77%	UPDVG62-40S40 1**
GPDT-50 3**	Gas storage	48	0.72	—	79	79%	PDVG62-50T45-NV 3, PDVG62-50T45-NVL 3, PDVG62-50T45-PV 31, PDVG62-50T45-PVL 31
GPDX-50L 3**	Gas storage	48	0.73	—	118	82%	PDVG62-50T62-NV 3*, PDVG62-50T62-PV 31
GPVL-40 2**	Gas storage	38	0.67	—	73	79%	PVG62-40S40-PVS 21, PVG6240S40NVS 2*
GPVL-50 2**	Gas storage	49	0.72	—	79	80%	PVG62-50S40-NVS 2*, PVG62-50S40-PVS 21
GPVNT-40 1**	Gas storage	38	0.73	—	91	78%	UPG62-40T42NV 1**
GPVNT-50 1**	Gas storage	48	0.72	—	85	78%	UPG62-50T42NV 1**
GPVT-40 2**	Gas storage	38	0.70	—	87	78%	PVG6240T50NVS 2, PVG6240T50NVSL 2, PVG6240T50PVS 21, PVG6240T50PVSL 21
GPVT-50 2**	Gas storage	48	0.72	—	97	81%	PVG6250T50NVS 2, PVG6250T50NVSL 2, PVG6250T50PVS 21, PVG6250T50PVSL 21
GPVX-50L 2**	Gas storage	50	0.73	—	119	82%	PVG6250S62NVS 2*, PVG6250S62PVS 21
GUC 40 4**	Gas storage	38	0.64	—	83	74%	GU101-40T40R 4, GU61 40T40R 4, GU81 40T40R 4**
GUC-30 4**	Gas storage	29	0.59	—	62	79%	GU101 30T30 4, GU6130T30 4
GUC-50 4**	Gas storage	48	0.61	—	84	77%	GU61-50T40R 4, GU81-50T40R 4
GUF-40 1**	Gas storage	38	0.65	—	68	73%	GUF-62-40T40 1**
GUF-50 1**	Gas storage	48	0.70	—	83	73%	GUF-62-50T40 1**
GUR 40 4**	Gas storage	38	0.64	—	83	77%	GU62 40T40R 4, GU82 40T40R 4
GUR-50 4**	Gas storage	48	0.64	—	84	77%	GU62-50T40R 4, GU82-50T40R 4
GURT-50RL 4**	Gas storage	49	0.63	—	92	77%	GU62 50T50R 4**
HDHE-75 4**	Gas storage	74	0.86	—	150	97%	VG8275T100*V
HESF-40 1**	Electric storage	37	0.92	—	64	98%	EE6U-40R 1, EEA8F-40R 1
HESF-50 1**	Electric storage	46	0.92	—	67	98%	EE6U-50R 1, EEA8F-50R 1
HETF-40 1**	Electric storage	36	0.93	—	63	98%	EE6U-40H 1**
HETF-50 1**	Electric storage	45	0.92	—	74	98%	EE6U-50H 1, EEA8F-50H 1
HETF-55 1**	Electric storage	55	0.94	—	75	98%	EE6U-55H 1, EEA8F-55H 1
HPACO-45 1+AXST-50LBTTP 1	Heat pump	48	3.55	—	72	428%	MHPCO-45 1+MXST-50LBTTP 1
HPACO-45 1+AXST-50S 1	Heat pump	46	3.52	—	70	429%	MHPCO-45 1+MXST-50S 1, MHPCO-45 1+MXST-50STTP 1
HPACO-45 1+AXST-50T 1	Heat pump	45	3.52	—	67	413%	MHPCO-45 1+MXST-50T 1, MHPCO-45 1+MXST-50TTTP 1
HPACO-45 1+AXST-66 1	Heat pump	60	3.70	—	82	435%	MHPCO-45 1+MXST-66 1, MHPCO-45 1+MXST-66TTP 1
HPACO-45 1+AXST-80 1	Heat pump	73	3.80	—	95	423%	MHPCO-45 1+MXST-80 1, MHPCO-45 1+MXST-80TTP 1
HPTA-40 2**	Heat pump	36	3.60	—	55	426%	HPA10240H045DV 2**
HPTA-50 2**	Heat pump	46	3.68	—	65	416%	HPA10250H045DV 2**
HPTA-66 2**	Heat pump	68	3.84	—	83	435%	HPA10266H045DV 2**
HPTA-80 2**	Heat pump	81	3.88	—	95	428%	HPA10280H045DV 2**
HPTS-50 2**	Heat pump	46	3.80	—	65	452%	HPS10250H045DV 2**
HPTS-66 2**	Heat pump	67	3.70	—	82	425%	HPS10266H045DV 2**
HPTS-80 2**	Heat pump	82	3.88	—	95	430%	HPS10280H045DV 2**
HPTU-50N 1**	Heat pump	46	3.45	—	66	407%	HPHE10250H045DVCTA-1, HPHE10250H045DVDR 1, HPHE10250H045DVN 1**
HPTU-66N 1**	Heat pump	67	3.45	—	79	265%	HPHE10266H045DVCTA-1, HPHE10266H045DVDR 1, HPHE10266H045DVN 1**
HPTU-80N 1**	Heat pump	82	3.45	—	86	233%	HPHE10280H045DVCTA-1, HPHE10280H045DVDR 1, HPHE10280H045DVN 1**
HPTV-50 2**	Heat pump	46	3.00	—	52	457%	HPV10250H009DV 2**
HPTV-66 2**	Heat pump	68	3.20	—	76	368%	HPV10266H009DV 2**
HPTV-80 2**	Heat pump	82	3.00	—	93	373%	HPV10280H009DV 2**
MHE6-30H-045D 1**	Electric storage	27	0.90	—	50	98%	EMH6-30H-030D 1, EMH6-30H-035D 1, MHNE3F30HD 1, MHNE3F30HS 1
MHE6-40R-045D 1**	Electric storage	36	0.95	—	54	98%	MHNE3F40RD 1, MHNE3F40RS 1
MHE6-40RW-035D-1**	Electric storage	36	0.91	—	40	98%	EMH6-40RW-030D-1, EMH6-40RW-035D-1, MHNE3F40RDW-1, MHNE3F40RSW-1
PCG62-40S50L 1**	Gas storage	38	0.90	—	86	91%	PCG62-40S50L 1**
PCG62-50S65L 1**	Gas storage	49	0.90	—	118	92%	PCG62-50S65L 1**
PESX-40 1**	Electric storage	37	0.92	—	66	98%	EE10X-40R 1**
PESX-50 1**	Electric storage	46	0.92	—	70	98%	EE10X-50R 1**
PETX-40 1**	Electric storage	37	0.92	—	64	98%	EE10X-40H 1**
PETX-50 1**	Electric storage	46	0.92	—	74	98%	EE10X-50H 1**
PETX-55 1**	Electric storage	55	0.94	—	76	98%	EE10X-55H 1**
PG10 34 100 2V 2*	Gas storage	33	0.90	—	170	95%	PG10 34 100 2V 2, PR-34-100 2**
T-H3-DV-N 1**	Gas tankless	—	0.93	5.8	—	96%	GT-540-NIH 1*, GT-540-PIH 11, GT-540P-NIH 1*, GT-540P-PIH 11, GT-540X3-NIH 1*, GT-540X3-PIH 11, MCT-199I-N 1*, MCT-199I-P 11
T-H3-OS-N 1**	Gas tankless	—	0.95	5.8	—	96%	GT-540-NEH 1*, GT-540-PEH 11, GT-540P-NEH 1*, GT-540P-PEH 11, GT-540X3-NEH 1*, GT-540X3-PEH 11, MCT-199O-N 1*, MCT-199O-P 11
T-H3J-DV-N 1**	Gas tankless	—	0.94	4.7	—	97%	GT-240-NIH 1*, GT-240-PIH 11, GT-240X3-NIH 1*, GT-240X3-PIH 11
T-H3J-OS-N 1**	Gas tankless	—	0.95	4.7	—	96%	GT-240-NEH 1*, GT-240-PEH 11, GT-240X3-NEH 1*, GT-240X3-PEH 11
T-H3M-DV-N 1**	Gas tankless	—	0.90	3.3	—	94%	GT-140-NIH 1*, GT-140-PIH 11
T-H3M-OS-N 1**	Gas tankless	—	0.91	3.5	—	96%	GT-140-NEH 1*, GT-140-PEH 11
T-H3S-DV-N 1**	Gas tankless	—	0.95	5.4	—	97%	GT-340-NIH 1*, GT-340-PIH 11, GT-340X3-NIH 1*, GT-340X3-PIH 11
T-H3S-OS-N 1**	Gas tankless	—	0.94	5.3	—	97%	GT-340-NEH 1*, GT-340-PEH 11, GT-340X3-NEH 1*, GT-340X3-PEH 11
TK-110U-E 2**	Gas tankless	—	0.81	3.5	—	83%	GT-110U-E 2**
TK-110U-I 2**	Gas tankless	—	0.81	3.5	—	85%	GT-110U-I 2**
TK-310C-NI 1**	Gas tankless	—	0.81	4.6	—	85%	GT-310C-NI 1**
TK-310CX3 1**	Gas tankless	—	0.81	4.7	—	83%	GT-310CX3 1**
TK-310U-E 2**	Gas tankless	—	0.81	4.8	—	86%	GT-310U-E 2**
TK-310U-I 2**	Gas tankless	—	0.81	4.7	—	84%	GT-310U-I 2**
TK-510C-NI 1**	Gas tankless	—	0.81	4.7	—	82%	GT-510C-NI 1**
TK-510CX3 1**	Gas tankless	—	0.81	5.0	—	83%	GT-510CX3 1**
TK-510U-E 2**	Gas tankless	—	0.81	5.0	—	84%	GT-510U-E 2**
TK-510U-I 2**	Gas tankless	—	0.81	5.0	—	84%	GT-510U-I 2**
UPVA-110E 1**	Electric tankless	—	0.93	1.0	—	98%	UPVM-110E 1**
UPVA-35K 1**	Electric tankless	—	0.92	0.4	—	98%	UPVM-35K 1**
UPVA-90E 1**	Electric tankless	—	0.93	0.8	—	98%	UPVM-90E 1**
VG6250T100V 3*	Gas storage	49	0.88	—	100	95%	VG6250T100V 3*
VG6250T76NV 1**	Gas storage	48	0.88	—	119	93%	VG6250T76NV 1**
VG8250T100*V	Gas storage	49	0.88	—	118	97%	VG8250T100*V

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

Per unit of energy, its heat into water, or UEF, reaches 3.88. This UEF belongs to a heat pump, which moves heat from the air. The highest UEF is shared by 2 basic models, among them the HPTA-80 2**. Its basic models with an ENERGY STAR certified model number come to 42 of 163.

Its range spans 6 kinds: gas storage, electric storage, gas tankless, heat pump, electric tankless, and tabletop. The PG10 34 100 2*V 2** holds this brand's highest first-hour rating: 170 gallons. Part of those 170 gallons is water warmed as the tank drains. Without a tank, the ATM-199M-N 1** gives this brand's highest flow. The test warms the water by 67°F at 6.0 gallons per minute.

On this site, 3 of the 117 brands list more model numbers than this one. At least one of its basic model numbers appears under each of 12 other brands. The brand that lists the most of them is A. O. Smith, at 158.

Basic models shared with other brands

American basic models also listed under another brand
Brand	Shared basic models
A. O. Smith	158
State	157
RELIANCE WATER HEATERS	139
Lochinvar	130
U.S. Craftmaster	32
John Wood	24
GSW WATER HEATERS	23
Takagi	18
Giant	4
Envirosense	2
Envirosense Enercare	2
Envirosense Reliance Home Comfort	2

Updated Oct 26, 2026 · Methodology

American water heaters

Certified figures by basic model

Basic models shared with other brands