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WGO Oil 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

Technical Data

Model AFUE (%) Burner Capacity (GPH) Net (MBH) DOE Heating Cap. (MBH) Vent Size (in.)
WGO-2 86 0.70 75 86 8 x 8
WGO-2RD* 87 0.70 75 86 8 x 8
WGO-3 85 0.95 100 115 8 x 8
WGO-3RD* 87 0.80 85 98 8 x 8
WGO-4 85 1.20 126 145 8 x 8
WGO-4RD* 87 1.0 107 123 8 x 8
WGO-5 85 1.45 152 175 8 x 8
WGO-5RD* 87 1.20 129 148 8 x 8
WGO-6 85 1.75 184 212 8 x 8
WGO-6RD* 87 1.40 150 173 8 x 8
WGO-7 85 2.00 210 242 8 x 8
WGO-7RD* 87 1.60 171 197 8 x 8
WGO-8 - 2.30 231 266 8 x 12
WGO-9 - 2.55 257 295 8 x 12