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GWS – Gas Water Sealed Combustion

  • 63,000 to 158,000 Btuh Input
  • Natural or Propane
  • Versatile
  • Sealed combustion option allows use of outside combustion air
  • Factory tested
  • Compact design
  • Easy service
  • One-piece access door
  • Plug-in wiring
  • Control module with diagnostic lights
  • High efficiency
  • AFUE’s to 85.3%
  • Spark-ignited pilot with electronic control
  • Cast iron sections with built-in air separator
  • Insulated heavy-gauge steel jacket
  • Limited lifetime warranty

Model
A.G.A. Input (MBH)
DOE Heating Capacity (MBH)
Net I=B=R Ratings (MBH)
Vent Size
Annual Fuel Utilization Efficiency (AFUE)
Shipping Weight
*GWS-063
63
54
47
3″
85.3
240
*GWS-090E
90
77
67
3″
85.0
280
GWS-095
95
81
70
3″
84.6
280
GWS-127
127
107
93
3″
84.0
325
GWS-158
158
133
115
3″
83.4
370

* As an Energy Star partner Williamson has determined that the GWS-063 & GWS-090E meet the Energy Star guidelines for energy efficiency.

Model
A.G.A. Input (MBH)
DOE Heating Capacity (MBH)
Net I=B=R Ratings (MBH)
Vent Size
Annual Fuel Utilization Efficiency (AFUE)
Shipping Weight
*GWS-063
63
54
47
3″
85.3
240
*GWS-090E
90
77
67
3″
85.0
280
GWS-095
95
81
70
3″
84.6
280
GWS-127
127
107
93
3″
84.0
325
GWS-158
158
133
115
3″
83.4
370

* As an Energy Star partner Williamson has determined that the GWS-063 & GWS-090E meet the Energy Star guidelines for energy efficiency.