WGO Series 4 Oil-Fired Water Boiler

Dedicated water-only oil boiler with cast iron sections - no tankless heater or cover plate
Quick open top and swing-away burner door with full chamber access increases visibility for inspection and servicing
Two flue outlets- rear and top - for complete venting flexibility
Recessed target wall design protects unit from flue brushes
Includes factory-wired circulator, service switch and Weil-McLain exclusive captured elastomer seals for added reliability
Available assembled or as a knockdown for installation areas with limited space

Technical Data

Model	Burner Input Rating GPH	Burner Input Rating MBH	Heating Capacity (MBH)	Net Ratings (MBH)	AFUE	Draft Loss Through Boiler (In. w/c)	Min. Chimney Size Rectangular (In.)	Min. Chimney Size Round (In.)	Min. Chimney Size Height (Ft.)	Approx. Shipping Weight (Lbs.)	ENERGY STAR
WGO-2	0.70	98	86	75	86.4	0.10	8x8	6	15	540
WGO-2RD	0.70	98	86	75	87.0	.010	8x8	6	15	540	YES
WGO-3R	0.80	112	98	85	86.2	.020	8x8	6	15	595
WGO-3RD	0.80	112	98	85	87.0	.010	8x8	6	15	595	YES
WGO-3D	0.95	133	115	100	86.0	.020	8x8	6	15	595
WGO-4R	1.00	140	122	106	86.2	.010	8x8	6	15	645
WGO-4RD	1.00	140	123	107	87.0	.010	8x8	6	15	645	YES
WGO-4D	1.20	168	146	127	86.0	.010	8x8	6	15	645
WGO-5R	1.20	168	147	128	86.1	.015	8x8	7	15	760
WGO-5RD	1.20	168	148	129	87.0	.015	8x8	7	15	760	YES
WGO-5D	1.45	203	176	153	86.0	.015	8x8	7	15	760
WGO-6R	1.40	196	171	149	86.1	.015	8x8	7	15	860
WGO-6RD	1.40	196	173	150	87.0	.015	8x8	7	15	860	YES
WGO-6D	1.75	245	213	185	86.0	.015	8x8	7	15	860
WGO-7R	1.60	224	196	170	86.0	.015	8x8	8	15	930
WGO-7RD	1.60	224	197	171	87.0	.015	8x8	8	15	930	YES
WGO-7D	2.00	280	244	212	86.0	.015	8x8	8	15	930
WGO-8	2.30	322	266	231	-	.025	8x12	8	20	1,030
WGO-9	2.55	357	295	257	-	.030	8x12	8	20	1,135

Technical Data