State water heaters

185 basic models and 436 listed models.

State 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%	SCTH-199M-(N,P) 1**
ATHR-160M 1**	Gas tankless	—	0.95	4.8	—	98%	STHR-160M 1, STHR-160X3 1
ATHR-180M 1**	Gas tankless	—	0.95	5.3	—	97%	STHR-180M 1, STHR-180X3 1
ATHR-199M 1**	Gas tankless	—	0.95	5.9	—	98%	STHR-199M 1, STHR-199X3 1
ATI-140B-N 1**	Gas tankless	—	0.81	3.6	—	84%	STI-140B-N, STI-140X3-N
ATI-180B-N 1**	Gas tankless	—	0.82	4.7	—	84%	STI-180B-N 1, STI-180X3-N 1
ATI-199B-N 1**	Gas tankless	—	0.82	5.2	—	85%	STI-199B-N 1, STI-199X3-N 1
ATM-140M-N 1**	Gas tankless	—	0.95	4.1	—	97%	STM-140M-N 1, STM-140X3-N 1
ATM-160M-N 1**	Gas tankless	—	0.95	4.8	—	96%	STM-160M-N 1*, STM-160M-P 11, STM-160X3-N 1*, STM-160X3-P 11
ATM-180M-N 1**	Gas tankless	—	0.95	5.4	—	96%	STM-180M-N 1*, STM-180M-P 11, STM-180X3-N 1*, STM-180X3-P 11
ATM-199M-N 1**	Gas tankless	—	0.95	6.0	—	96%	STM-199M-N 1*, STM-199M-P 11, STM-199X3-N 1*, STM-199X3-P 11
ATO-140B-N 1**	Gas tankless	—	0.81	3.6	—	84%	STO-140B-N, STO-140X3-N
ATO-180B-N 1**	Gas tankless	—	0.82	4.7	—	86%	STO-180B-N 1, STO-180X3-N 1
ATO-199B-N 1**	Gas tankless	—	0.82	5.0	—	86%	STO-199B-N 1, STO-199X3-N 1
C2VA-120E 1**	Electric tankless	—	0.84	1.2	—	86%	C2VS-120E 1**
E62-38T-045DV 1**	Tabletop	35	0.90	—	55	98%	EN6-38-2OTT 1**
EELBU-50 1**	Electric storage	44	0.92	—	55	98%	EE6-50-DULBS 1, EEX-50-DULBS 1
EETU-55W 1**	Electric storage	55	0.92	—	64	98%	EE6-55-DURTW 1**
ENJ-30 1**	Electric storage	26	0.91	—	43	98%	EN6-30-DOMS 1, EN6-30-SOMS 1, SHN-30-DOMS 1, SHN-30-SOMS 1
ENJ-40 1**	Electric storage	35	0.93	—	54	98%	EN6-40-DOMS 1**
ENJ-40W 1**	Electric storage	35	0.91	—	38	98%	EN6-40-DOMSW 1**
ENJB-30 1**	Electric storage	26	0.90	—	47	98%	EN6-30-DOMBS 1**
ENJB-40 1**	Electric storage	35	0.94	—	57	98%	EN6-40-DOMBS 1, EN6-40-SOMBS 1
ENJB-40W 1**	Electric storage	35	0.91	—	38	98%	EN6-40-DOMBSW 1, EN6-40-SOMBSW 1
ENL-30 1**	Electric storage	26	0.90	—	44	98%	EN6-30-DOLS 1, EN6-30-SOLS 1, ESX-30-DOLS 1**
ENL-36 2**	Electric storage	33	0.92	—	51	98%	EN6-36-DOLS 2, ESX-36-DOLS 2, PCE-30-2OLSA 2**
ENL-40 1**	Electric storage	35	0.89	—	50	98%	EN6-40-DOLS 1, EN6-40-SOLS 1
ENL-50 1**	Electric storage	48	0.92	—	51	98%	EN6-50-DOLS 1, EN6-50-SOLS 1, ESX-50-DOLS 1, PCE-50-2OLSA 1
ENLB-30 1**	Electric storage	26	0.89	—	43	98%	EN6-30-DOLBS 1, ESX-30-DOLBS 1
ENLB-40 1**	Electric storage	35	0.92	—	51	98%	EN6-40-DOLBS 1, EN6-40-SOLBS 1, ESX-40-DOLBS 1, PCE-40-2OLSA 1
ENLB-40W 1**	Electric storage	35	0.90	—	38	98%	EN6-40-DOLBSW 1**
ENLB-50 1**	Electric storage	44	0.93	—	60	98%	EN6-50-DOLBS 1, EN6-50-SOLBS 1, ESX-50-DOLBS 1**
ENLB-50W 1**	Electric storage	44	0.91	—	40	98%	EN6-50-DOLBSW 1, ESX-50-DOLBSW 1
ENS-30 1**	Electric storage	27	0.89	—	47	98%	EN6-30-DORS 1, ESX-30-DONS 1
ENS-40 1**	Electric storage	37	0.92	—	55	98%	EN6-40-DORS 1, EN6-40-SORS 1, EN8-40-DORS 1, ESX-40-DONS 1, FN6-40-DORS 1, PCE-30-2ORTA 1
ENS-40W 1**	Electric storage	37	0.88	—	41	98%	EN6-40-DORSW 1**
ENS-50 1**	Electric storage	46	0.92	—	57	98%	EN6-50-DORS 1, EN6-50DORS 1, EN8-50-DORS 1, ESX-50-DONS 1, FN6-50-DORS 1**
ENSB-30 1**	Electric storage	27	0.91	—	50	98%	EN6-30-DOBS 1**
ENT-40 1**	Electric storage	36	0.92	—	53	98%	EN6-40-DORT 1, EN6-40-SORT 1, EN8-40-DORT 1, ESX-40-DONT 1, SHN-40-DORT 1, SHN-40-SORT 1
ENT-50-1**	Electric storage	46	0.92	—	62	98%	EN6-50-DORT 1, EN6-50-SORT 1, EN8-50-DORT 1, ESX-50-DONT 1, PCE-40-2ORTA 1, SHN-50-DORT 1
ENT-55 1**	Electric storage	55	0.93	—	72	98%	EN6-55-DORT 1, EN8-55-DORT 1, ESX-55-DONT 1, FN6-55-DORT 1, PCE-52-2ORTA 1**
FMDV-30 2**	Gas storage	29	0.61	—	60	78%	GS6-30-MDV 2, SCI-30-MDV 2
FMDV-40 2**	Gas storage	38	0.59	—	57	76%	GS6-40-MDV 2, SCI-40-MDV 2
FMDV-50 2**	Gas storage	47	0.57	—	67	77%	GS6-50-MDV 2, SCI-50-MDV 2
FMHR-30 4**	Gas storage	29	0.60	—	63	79%	GS6 30 MHG 4, SCI 30 MHG 4
FMHR-40 4**	Gas storage	38	0.58	—	59	78%	GS6-40-MHG 4, SCI-40-MHG 4
FPTU-50 1**	Heat pump	46	3.35	—	66	407%	HP6-50-DHPT 1**
FPTU-66 1**	Heat pump	67	3.42	—	79	265%	HP6-66-DHPT 1**
FPTU-80 1**	Heat pump	82	3.45	—	84	233%	HP6-80-DHPT 1**
G6-US4040NV 5**	Gas storage	38	0.64	—	83	75%	GS6-40-BCUS 5**
G6-UT3030NVR 5**	Gas storage	29	0.60	—	67	76%	GS6-30-ORUT 5**
G6N-UT4040NVR 5**	Gas storage	38	0.64	—	83	74%	GS6-40-BRUT 5**
G6N-UT5040NVR 5**	Gas storage	48	0.63	—	76	77%	GS6-50-BRUT 5, GW8-50-BRUT 5
G9-UT4040NVR 5**	Gas storage	38	0.64	—	83	77%	GS6-40-BCUT 5, GW8-40-BCUT 5
G9-UT5040NVR 5**	Gas storage	48	0.64	—	78	77%	GS6-50-BCUT 5, GSX-50-BCUT 5
GCB-30R 4**	Gas storage	29	0.60	—	62	74%	GS6-30-ORBTR 4*, GS6-30-ORBTR 41, GSX-30-ORBTR 4**
GCB-40 4**	Gas storage	38	0.64	—	78	77%	GS6-40-BRBT 4*, GS6-40-BRBT 41, GSX-40-BRBT
GCBL-30R 4**	Gas storage	29	0.60	—	65	75%	GS6-30-ORBSR 4*, GS6-30-ORBSR 41
GCBL-40 4**	Gas storage	38	0.57	—	68	75%	GS6-40-BRBS 4*, GS6-40-BRBS 41
GCF-40 1**	Gas storage	38	0.64	—	70	73%	GS6-40-HBFT 11, GS6-40-YBFT 1*
GCF-50 1**	Gas storage	48	0.69	—	84	80%	GS6-50-HBFT 11, GS6-50-YBFT 1*
GCFL-40 1**	Gas storage	38	0.66	—	65	77%	GS6-40-HBFS 11, GS6-40-YBFS 1*
GCFL-50 1**	Gas storage	49	0.69	—	78	79%	GS6-50-YBFS 1**
GCG-50 4**	Gas storage	48	0.62	—	81	79%	GS6-50-BRT 4*, GS6-50-BRT 41, GS6-50-BRTL 4*, GS6-50-BRTL 41, GSX-50-BRT 4*, GSX-50-BRT 41, GW8-50-BRT 4*, GW8-50-BRT 41
GCGH-50 2**	Gas storage	48	0.63	—	76	77%	GS6-50-ORT 2*, GS6-50-ORT 21
GCR-30 2**	Gas storage	29	0.63	—	63	77%	GS6-30-OCT 2*, GS6-30-OCT 21
GCR-30R 2**	Gas storage	29	0.61	—	52	74%	GS6-30-OCTR 2*, GS6-30-OCTR 21
GCR-30R 4**	Gas storage	29	0.60	—	62	73%	GS6-30-OCTR 4*, GS6-30-OCTR 41, GSX-30-OCTR 4**
GCR-40 2**	Gas storage	38	0.64	—	80	74%	GS6-40-BCT 2*, GS6-40-BCT 21
GCR-40 410	Gas storage	38	0.64	—	80	78%	GS6-40-BCT 410, GS6-40-BCT 411, GS6-40-BCTL 410, GS6-40-BCTL 411, GSX-40-BCT 410, GSX-40-BCT 411, GSX-40-BCTL 410, GW8-40-BCT 410, GW8-40-BCT 411
GCR-50 2**	Gas storage	48	0.64	—	81	80%	GS6-50-BCT 2*, GS6-50-BCT 21
GCR-50 4**	Gas storage	48	0.62	—	84	77%	GS X 50 BCT 41, GS6-50-BCT 4, GS6-50-BCT 41, GS6-50-BCTL 4*, GS6-50-BCTL 41, GSX-50-BCT 4, GSX-50-BCTL 4, GW8-50-BCT 4*, GW8-50-BCT 41
GCRH-40 4**	Gas storage	38	0.59	—	65	80%	GS6-40-OCT 4, GSX-40-OCT 4
GCRL-30R 4**	Gas storage	29	0.60	—	55	75%	GS6-30-OCSR 4, GSX-30-OCSR 4
GCRL-40 2**	Gas storage	38	0.58	—	64	74%	GS6-40-BCS 2*, GS6-40-BCS 21
GCRL-40 4**	Gas storage	38	0.58	—	67	78%	GS6-40-BCS 4*, GS6-40-BCS 41, GSX-40-BCS 4*, GSX-40-BCS 41, GW8-40-BCS 4*, GW8-40-BCS 41
GCRL-50 2**	Gas storage	49	0.62	—	78	73%	GS6-50-BCS 2*, GS6-50-BCS 21
GCRL-50 4**	Gas storage	50	0.62	—	81	77%	GS6-50-BCS 4*, GS6-50-BCS 41, GSX-50-BCS 4*, GSX-50-BCS 41, GW8-50-BCS 4*, GW8-50-BCS 41
GCRT-50 4**	Gas storage	48	0.61	—	89	77%	GS6-50-RCT 4*, GS6-50-RCT 41, GS6-50-RCTL 4*, GS6-50-RCTL 41, GSX-50-RCT 4*, GSX-50-RCT 41, GW8-50-RCT 4*, GW8-50-RCT 41, GW8-50-RCTL 4*, GW8-50-RCTL 41
GCRX-50 2**	Gas storage	49	0.61	—	99	75%	GS6-50-XCT 2*, GS6-50-XCT 21, GS6-50-XCTL 2*, GS6-50-XCTL 21, GSX-50-XCT 2, GSX-50-XCTL 2
GCRX-55 2**	Gas storage	55	0.62	—	83	74%	GS6-55-XCT 2*, GS6-55-XCT 21, GS6-55-XCTL 2*, GS6-55-XCTL 21, GSX-55-XCT 2*, GSX-55-XCT 21, GSX-55-XCTL 2, GW8-55-XCT 2, GW8-55-XCT 21, GW8-55-XCTL 2, GW8-55-XCTL 21, SBS-55-60 2*, SBS-55-60 21
GDHE-75 3**	Gas storage	74	0.86	—	130	96%	GP6-75- TPDT 3*
GDV-40 3**	Gas storage	39	0.60	—	64	75%	GS6-40-HBDS 31, GS6-40-HBDSL 31, GS6-40-YBDS 3, GS6-40-YBDSL 3, SCI-40-YOMDS 3**
GDV-50 3**	Gas storage	48	0.66	—	77	79%	GS6-50-HBDS 31, GS6-50-HBDSL 31, GS6-50-YBDS 3, GS6-50-YBDSL 3, SCI-50-YOMDS 3**
GDVNL-40L 1**	Gas storage	38	0.61	—	64	74%	GS6-40-UODSL 1**
GDVNT-50L 1**	Gas storage	48	0.65	—	84	81%	GS6-50-UODTL 1**
GDVT-50 3**	Gas storage	48	0.65	—	82	79%	GS6-50-HRDS 31, GS6-50-HRDSL 31, GS6-50-YRDS 3, GS6-50-YRDSL 3
GP-8-50-TPDT 4*	Gas storage	49	0.88	—	118	97%	GP-8-50-TPDT 4*
GP6-40-RPCSL 1*	Gas storage	38	0.90	—	86	91%	GP6-40-RPCSL 1*
GP6-50-TPDT 3*	Gas storage	49	0.88	—	100	95%	GP6-50-TPDT 3*
GP6-50-XPCSL 1*	Gas storage	49	0.90	—	118	92%	GP6-50-XPCSL 1*
GP6-50-YTVIT 1**	Gas storage	48	0.88	—	119	93%	GP6-50-YTVIT 1**
GPCT-40L 1**	Gas storage	38	0.90	—	86	91%	GP8-40-HRPCSL 1, GP8-40-YRPCSL 1
GPCX-50L 1**	Gas storage	49	0.90	—	118	92%	GP8-50-HXPCSL 1, GP8-50-YXPCSL 1
GPDL-40 3**	Gas storage	38	0.68	—	74	79%	GS6-40-HBPDS 31, GS6-40-HBPDSL 31, GS6-40-YBPDS 3, GS6-40-YBPDSL 3
GPDNL-40 1**	Gas storage	38	0.70	—	75	77%	GS6-40-UBPDS 1**
GPDNT-50 1**	Gas storage	48	0.70	—	75	79%	GS6-50-UBPDT 1**
GPDT-50 3**	Gas storage	48	0.72	—	79	79%	GS6-50-HBPDT 31, GS6-50-HBPDTL 31, GS6-50-YBPDT 3, GS6-50-YBPDTL 3
GPDX-50L 3**	Gas storage	48	0.73	—	118	82%	GS6-50-HRPDTL5 31, GS6-50-YRPDTL5 3*
GPVL-40 2**	Gas storage	38	0.67	—	73	79%	GS6-40-HBVIS 21, GS6-40-YBVIS 2*
GPVL-50 2**	Gas storage	49	0.72	—	79	80%	GS6-50-HBVIS 21, GS6-50-YBVIS 2*
GPVNT-40 1**	Gas storage	38	0.73	—	91	78%	GS6-40-UBPVT 1**
GPVNT-50 1**	Gas storage	48	0.72	—	85	78%	GS6-50-UBPVT 1**
GPVT-40 2**	Gas storage	38	0.70	—	87	78%	GS6-40-HRVIT 21, GS6-40-HRVITL 21, GS6-40-YRVIT 2, GS6-40-YRVITL 2
GPVT-50 2**	Gas storage	48	0.72	—	97	81%	GS6-50-HRVIT 21, GS6-50-HRVITL 21, GS6-50-YRVIT 2, GS6-50-YRVITL 2
GPVX-50L 2**	Gas storage	50	0.73	—	119	82%	GS6-50-HRVHSL 21, GS6-50-YRVHSL 2*
GUC 40 4**	Gas storage	38	0.64	—	83	74%	GS 6 40 BRUT* 4*, GSX 40 BRUT 4*, GW8 40 BRUT 4**
GUC-30 4**	Gas storage	29	0.59	—	62	79%	GS X 30 ORUT 4, GS6-30-ORUT 4
GUC-50 4**	Gas storage	48	0.61	—	84	77%	GS6-50-BRUT 4, GSX-50-BRUT 4, GW8-50-BRUT 4**
GUF-40 1**	Gas storage	38	0.65	—	68	73%	GS6-40-BFUT 1**
GUF-50 1**	Gas storage	48	0.70	—	83	73%	GS6-50-BFUT 1**
GUR 40 4**	Gas storage	38	0.64	—	83	77%	GS6 40 BCUT* 4*, GSX 40 BCUT 4*, GW8 40 BCUT 4**
GUR-50 4**	Gas storage	48	0.64	—	84	77%	GS X 50 BCUT 4, GS6-50-BCUT 4, GW8-50-BCUT 4**
GURT-50RL 4**	Gas storage	49	0.63	—	92	77%	GS6-50-RCUTR 4**
HDHE-75 4**	Gas storage	74	0.86	—	150	97%	GP-8-75-TPDT 4*
HESF-40 1**	Electric storage	37	0.92	—	64	98%	EE6-40-DURS 1, EEA8-40-DFRS 1, EEX-40-DURS 1**
HESF-50 1**	Electric storage	46	0.92	—	67	98%	EE6-50-DURS 1, EEA8-50-DFRS 1, EEX-50-DURS 1**
HETF-40 1**	Electric storage	36	0.93	—	63	98%	EE6-40-DURT 1, EEA8-40-DFRT 1, EEX-40-DURT 1**
HETF-50 1**	Electric storage	45	0.92	—	74	98%	EE6-50-DURT 1, EEA8-50-DFRT 1, EEX-50-DURT 1**
HETF-55 1**	Electric storage	55	0.94	—	75	98%	EE6-55-DURT 1, EEA8-55-DFRT 1, EEX-55-DURT 1**
HPACO-45 1+AXST-50LBTTP 1	Heat pump	48	3.55	—	72	428%	SHPCO-45 1+SXST-50LBG 1
HPACO-45 1+AXST-50S 1	Heat pump	46	3.52	—	70	429%	SHPCO-45 1+SXST-50S 1, SHPCO-45 1+SXST-50SG 1
HPACO-45 1+AXST-50T 1	Heat pump	45	3.52	—	67	413%	SHPCO-45 1+SXST-50T 1, SHPCO-45 1+SXST-50TG 1
HPACO-45 1+AXST-66 1	Heat pump	60	3.70	—	82	435%	SHPCO-45 1+SXST-66 1, SHPCO-45 1+SXST-66G 1
HPACO-45 1+AXST-80 1	Heat pump	73	3.80	—	95	423%	SHPCO-45 1+SXST-80 1, SHPCO-45 1+SXST-80G 1
HPTA-40 2**	Heat pump	36	3.60	—	55	426%	CSHP-40 2, HPAX-40-DHPT 2
HPTA-50 2**	Heat pump	46	3.68	—	65	416%	CSHP-50 2, HPAX-50-DHPT 2
HPTA-66 2**	Heat pump	68	3.84	—	83	435%	CSHP-66 2, HPAX-66-DHPT 2
HPTA-80 2**	Heat pump	81	3.88	—	95	428%	CSHP-80 2, HPAX-80-DHPT 2
HPTS-50 2**	Heat pump	46	3.80	—	65	452%	HPSX-50-DHPT 2**
HPTS-66 2**	Heat pump	67	3.70	—	82	425%	HPSX-66-DHPT 2**
HPTS-80 2**	Heat pump	82	3.88	—	95	430%	HPSX-80-DHPT 2**
HPTU-50N 1**	Heat pump	46	3.45	—	66	407%	HPX-50-DHPTCTA 1, HPX-50-DHPTDR 1, HPX-50-DHPTNE 1**
HPTU-66N 1**	Heat pump	67	3.45	—	79	265%	HPX-66-DHPTCTA 1, HPX-66-DHPTDR 1, HPX-66-DHPTNE 1**
HPTU-80N 1**	Heat pump	82	3.45	—	86	233%	HPX-80-DHPTCTA 1, HPX-80-DHPTDR 1, HPX-80-DHPTNE 1**
HPTV-50 2**	Heat pump	46	3.00	—	52	457%	HPVX-50-DHPT 2**
HPTV-66 2**	Heat pump	68	3.20	—	76	368%	HPVX-66-DHPT 2**
HPTV-80 2**	Heat pump	82	3.00	—	93	373%	HPVX-80-DHPT 2**
MHE6-30H-045D 1**	Electric storage	27	0.90	—	50	98%	SHN-30-DHMT 1, SHN-30-SHMT 1
MHE6-40R-045D 1**	Electric storage	36	0.95	—	54	98%	EN6-40-DMHS 1, SHN-40-DHMS 1, SHN-40-SHMS 1**
MHE6-40RW-035D-1**	Electric storage	36	0.91	—	40	98%	EN6-40-DMHSW-1, SHN-40-DHMSW-1, SHN-40-SHMSW-1**
PESX-40 1**	Electric storage	37	0.92	—	66	98%	EEX-40-DXRS 1**
PESX-50 1**	Electric storage	46	0.92	—	70	98%	EEX-50-DXRS 1**
PETX-40 1**	Electric storage	37	0.92	—	64	98%	EEX-40-DXRT 1**
PETX-50 1**	Electric storage	46	0.92	—	74	98%	EEX-50-DXRT 1**
PETX-55 1**	Electric storage	55	0.94	—	76	98%	EEX-55-DXRT 1**
PG10 34 100 2V 2*	Gas storage	33	0.90	—	170	95%	GHX-34-100 N 2**
R2VA-140E 1**	Electric tankless	—	0.84	1.3	—	93%	C2VS-140E 1, C2VS-140X 1, R2VS-140E 1, R2VS-140X 1
R2VA-160E 1**	Electric tankless	—	0.82	1.6	—	92%	C2VS-160E 1, R2VS-160E 1
R4LA-180E 1**	Electric tankless	—	0.92	1.7	—	96%	C4LS-180E 1, R4LS-180E 1
R4LA-220E 1**	Electric tankless	—	0.92	2.2	—	97%	C4LS-220E 1, R4LS-220E 1
R4LA-240E 1**	Electric tankless	—	0.92	2.3	—	97%	R4LS-240E 1**
R4LA-280E 1**	Electric tankless	—	0.92	2.5	—	98%	C4LS-280E 1, C4LS-280X 1, R4LS-280E 1, R4LS-280X 1
R4MA-320E 1**	Electric tankless	—	0.93	2.8	—	98%	C4MS-320E 1, R4MS-320E 1
T-H3-DV-N 1**	Gas tankless	—	0.93	5.8	—	96%	GTS-540-NIH 1*, GTS-540-PIH 11, GTS-540P-NIH 1*, GTS-540P-PIH 11, GTS-540X3-NIH 1*, GTS-540X3-PIH 11, SCT-199I-N 1*, SCT-199I-P 11
T-H3-OS-N 1**	Gas tankless	—	0.95	5.8	—	96%	GTS-540-NEH 1*, GTS-540-PEH 11, GTS-540P-NEH 1*, GTS-540P-PEH 11, GTS-540X3-NEH 1*, GTS-540X3-PEH 11, SCT-199O-N 1*, SCT-199O-P 11
T-H3J-DV-N 1**	Gas tankless	—	0.94	4.7	—	97%	GTS-240-NIH 1*, GTS-240-PIH 11, GTS-240X3-NIH 1*, GTS-240X3-PIH 11
T-H3J-OS-N 1**	Gas tankless	—	0.95	4.7	—	96%	GTS-240-NEH 1*, GTS-240-PEH 11, GTS-240X3-NEH 1*, GTS-240X3-PEH 11
T-H3M-DV-N 1**	Gas tankless	—	0.90	3.3	—	94%	GTS-140-NIH 1*, GTS-140-PIH 11
T-H3M-OS-N 1**	Gas tankless	—	0.91	3.5	—	96%	GTS-140-NEH 1*, GTS-140-PEH 11
T-H3S-DV-N 1**	Gas tankless	—	0.95	5.4	—	97%	GTS-340-NIH 1*, GTS-340-PIH 11, GTS-340X3-NIH 1*, GTS-340X3-PIH 11
T-H3S-OS-N 1**	Gas tankless	—	0.94	5.3	—	97%	GTS-340-NEH 1*, GTS-340-PEH 11, GTS-340X3-NEH 1*, GTS-340X3-PEH 11
TK-110U-E 2**	Gas tankless	—	0.81	3.5	—	83%	GTS-110U-E 2**
TK-110U-I 2**	Gas tankless	—	0.81	3.5	—	85%	GTS-110U-I 2**
TK-310C-NI 1**	Gas tankless	—	0.81	4.6	—	85%	GTS-310C-NI 1**
TK-310CX3 1**	Gas tankless	—	0.81	4.7	—	83%	GTS-310CX3 1**
TK-310U-E 2**	Gas tankless	—	0.81	4.8	—	86%	GTS-310U-E 2**
TK-510C-NI 1**	Gas tankless	—	0.81	4.7	—	82%	GTS-510C-NI 1**
TK-510CX3 1**	Gas tankless	—	0.81	5.0	—	83%	GTS-510CX3 1**
TK-510U-E 2**	Gas tankless	—	0.81	5.0	—	84%	GTS-510U-E 2**
TK-510U-I 2**	Gas tankless	—	0.81	5.0	—	84%	GTS-510U-I 2**
UPVA-110E 1**	Electric tankless	—	0.93	1.0	—	98%	UPVS-110E 1**
UPVA-110Y 1**	Electric tankless	—	0.94	1.0	—	98%	UPVS-110Y 1**
UPVA-18K 1**	Electric tankless	—	0.94	0.2	—	98%	UPVS-18K 1**
UPVA-24K 1**	Electric tankless	—	0.93	0.2	—	98%	UPVS-24K 1**
UPVA-30K 1**	Electric tankless	—	0.93	0.3	—	98%	UPVS-30K 1**
UPVA-35E 1**	Electric tankless	—	0.92	0.4	—	98%	UPVS-35E 1**
UPVA-35K 1**	Electric tankless	—	0.92	0.4	—	98%	UPVS-35K 1**
UPVA-40Y 1**	Electric tankless	—	0.93	0.4	—	98%	UPVS-40Y 1**
UPVA-45E 1**	Electric tankless	—	0.92	0.5	—	98%	UPVS-45E 1**
UPVA-55E 1**	Electric tankless	—	0.92	0.5	—	98%	UPVS-55E 1**
UPVA-55Y 1**	Electric tankless	—	0.93	0.5	—	98%	UPVS-55Y 1**
UPVA-70E 1**	Electric tankless	—	0.92	0.7	—	98%	UPVS-70E 1**
UPVA-80Y 1**	Electric tankless	—	0.94	0.8	—	98%	UPVS-80Y 1**
UPVA-90E 1**	Electric tankless	—	0.93	0.8	—	98%	UPVS-90E 1**

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

Hot water out per unit of energy in, called UEF, reaches 3.88 among State models. This UEF belongs to a heat pump, which moves heat from the air. Of this brand's basic models, 2 share the highest UEF, the HPTA-80 2** among them. Its basic models with an ENERGY STAR certified model number come to 42 of 185.

This brand lists 6 kinds: gas storage, electric storage, gas tankless, electric tankless, heat pump, and tabletop. Its first-hour peak, 170 gallons, comes from the PG10 34 100 2*V 2**. Part of those 170 gallons is water warmed as the tank drains. This brand's highest tankless flow belongs to the ATM-199M-N 1**. In the test, that flow warms by 67°F at 6.0 gallons per minute.

On this site, 2 of the 117 brands list more model numbers than State's 436. Each of 12 other brands shares at least one basic model number with this brand. The largest overlap is with A. O. Smith, at 180 basic model numbers.

Basic models shared with other brands

State basic models also listed under another brand
Brand	Shared basic models
A. O. Smith	180
American	157
RELIANCE WATER HEATERS	148
Lochinvar	133
U.S. Craftmaster	33
John Wood	24
GSW WATER HEATERS	23
Takagi	17
Giant	4
Envirosense	2
Envirosense Enercare	2
Envirosense Reliance Home Comfort	2

Updated Oct 26, 2026 · Methodology

State water heaters

Certified figures by basic model

Basic models shared with other brands