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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
ModelA.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-04747.540354″83.0190
GWI-0636353464″83.3190
GWI-0959579695″83.0230
GWI-127127106925″82.7270
GWI-1581581311145″82.4325
GWI-1901901571375″82.1370
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