AO Smith 40-gallon Gas Water Heaters - Comparison

Compare the AO Smith 40-gallon gas water heaters to find the best model for your home. The comparison charts display the main differences between tank-type heaters, and it includes the technical data and main features. The article compares the first-hour rating, recovery rate, energy efficiency and igniter and anode rod type, and energy saving systems...

Technical data comparison

Specs. --------- Model	Input (Btu) x1000	First Hour Delivery (GPH)	Recovery Rate (90F) (GPH)	Energy Factor EF	Approx. Height/ Type (Inch)	Vent Type	Warr anty
Professional Classic Manufactured Housing
PROG30-32N RH61 MH	32	48	32.3	0.61	60 Tall	A	6
Professional Classic
PROG29-32N RH62	32	50	32.3	0.62	60 Tall	A	6/10
PROG29-30P RH62	30	50?	30.3	0.62	60 Tall	A	6/10
PROG30S-30N RH61	30	50	30.3	0.61	50 Short	A	6/10
Professional Classic Manufactured Housing
PROG30-30N RH61 MH DV	30	51	30.3	0.61	57 Tall	DV	6
Professional Classic Plus Induced Draft
PRO+G29-60N RH70 ID	60	90	61	0.70	65 Tall	ID	8/12
Professional Classic Ultra Low NOx
PROG28-30U RH62	30	53	30.3	0.62	59 Tall	A	6/10

Vent type:

A-Atmospheric, PV-Power Vent, DV-Direct Vent, PDV- Power Direct Vent

Gas type:

N - Natural gas, P - Propane

Models with the energy factor, EF, of 0.67 and over are Energy Star.

Features comparison

Specs. --------- Model	Input (Btu) x1000	First Hour Delivery (GPH)	Recovery Rate (90F) (GPH)	Energy Factor	Approx. Height/ Type (Inch)	Vent Type	Warr anty
Effex High Efficiency
GAHH-40	40	70	43	0.70	62 Tall	A	6
High Efficiency
GCF-40	40	67	42	0.67	64 Tall	A	6
GCFL-40	40	67	42	0.67	54 Short	A	6
Conservationist
XGV-40	40	70	41	0.63	62 Tall	A	10
ProMax Ultra-Low NOx
GCNH-40	40	65	40	0.59	62 Tall	A	10
GNR-40	40	70	40	0.62	62 Tall	A	10
ProMax High Recovery / High Efficiency
GCVT-40	50	75	51	0.59	62 Tall	A	6, 8, 10
GVR-40	40	70	41	0.62	62 Tall	A	6, 8, 10
GVRL-40	40	67	41	0.62	51 Short	A	6, 8, 10
ProMax
GCV-40	40	70	41	0.59	62 Tall	A	6, 8, 10
GCVL-40	40	70	41	0.59	51 Short	A	6, 8, 10
Energy Saver Manufactured Housing
FMV-40	32 35.5	52	36	0.63	61 Tall	A	6
FMD-40	32	64	33	0.59	56 Tall	DV	6
ProMax Power Direct Vent
GPD-40	40	70	41	0.60	57 Tall	PDV	6, 10
ProMax Power Vent
GPVL-40	40	73	44.7	0.70	59 Tall	PV	6, 10
GPVT-40	50	90	55.9	0.70	68 Tall	PV	6, 10
ProMax Power Vent Ultra Low NOx
GPNH-40	42	69	42.6	0.68	59 Tall	PV	6
ProMax Direct Vent
GDV-40	38	73	41	0.60	68 Tall	DV	6
ProMax Direct Vent Ultra Low
GDNL-40	36	59	39	0.59	65 Tall	DV	6
ProMax SideLoop
GCVH-40L	40	70	41	0.59	62 Tall	A	6
GCVT-40L	50	75	51	0.60	62 Tall	A	6
GDV-40L	38	73	41	0.60	68 Tall	DV	6
GPD-40L	40	70	41	0.60	57 Tall	PDV	6