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Williamson GWI Boiler

  • 47,500 to 190,000 Btuh Input
  • Natural or Propane
  • Versatile
  • Induced-draft design allows sidewall or chimney venting
  • High efficiency
  • AFUE’s to 83.3%
  • Spark-ignited pilot with electronic control
  • Compact design
  • Factory tested
  • Easy service
  • One-piece access door
  • All controls in easy reach
  • Color-coded wiring
  • Cast iron sections with built-in air separator
  • Insulated heavy-gauge steel jacket
Model A.G.A. Input (MBH) DOE Heating Capacity (MBH) Net I=B=R Ratings (MBH) Chimney / Breeching Size: Annual Fuel Utilization Efficiency (AFUE) Shipping Weight
GWI-047 47.5 40 35 4″ 83.0 190
GWI-063 63 53 46 4″ 83.3 190
GWI-095 95 79 69 5″ 83.0 230
GWI-127 127 106 92 5″ 82.7 270
GWI-158 158 131 114 5″ 82.4 325
GWI-190 190 157 137 5″ 82.1 370

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