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Williamson GWC Boiler

  • AFUE’s above 91%
  • PVC or stainless steel venting
  • Cast iron primary heat exchanger
  • Stainless steel condensing secondary heat exchanger
  • Sealed combustion or direct exhaust venting
  • Multiple pass heat exchanger
  • Control module with indicator lights
Model A.G.A. Input (MBH) DOE Heating Capacity (MBH) Net I=B=R Ratings (MBH) Min. Vent Size Annual Fuel Utilization Efficiency (AFUE)
GWC-070 70 65 56 3″ 91.9
GWC-105 105 97 84 3″ 91.2
GWC-140 140 130 113 3″ 91.4
GWC-175 175 161 140 3″ 91.0

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