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WTGO Oil Boiler

  • Oil-fired water boiler with cast iron sections
  • High capacity / high efficiency tankless heater
  • Quick open top and swing-away burner door with full chamber access increases visibility for inspection and servicing
  • Includes factory-wired circulator, service switch and Weil-McLain exclusive captured elastomer seals for added reliability
  • Recessed target wall design protects unit from flue brushes
  • Two flue outlets- rear and top - for complete venting flexibility
  • Available assembled or as a knockdown for installation areas with limited space

Technical Data

Model AFUE (%) CSA Input (MBH) Net (MBH) DOE Heating Cap. (MBH) Vent Size (in.) Tankless Heater Intermittent Draw (GPM)
WTGO-3 85 1 100 115 8 x 8 3
WTGO-3L 85 0.95 99 114 8 x 8 3.25
WTGO-3LR 86.4 0.7 75 86 8 x 8 3.25
WTGO-3RD* 87 1 85 98 8 x 8 3
WTGO-4 85 1.2 126 145 8 x 8 3.75
WTGO-4RD* 87 1 107 123 8 x 8 3.75
WTGO-5 85 1.45 152 175 8 x 8 4
WTGO-5RD* 87 1.2 129 148 8 x 8 4
WTGO-6 85 1.75 184 212 8 x 8 4.25
WTGO-6RD* 87 1.4 150 173 8 x 8 4.25
WTGO-7 85 2 210 242 8 x 8 5.5
WTGO-7RD* 87 1.6 171 197 8 x 8 5.5
WTGO-8 - 2.3 231 266 8 x 12 5.75
WTGO-9 - 2.55 257 295 8 x 12 6