Williamson GWC-175-N-T-S2-W 175K BTU Condensing Gas-Fired Water Boiler 91.0%

Out of stock

Gas-Fired Water Condensing Boiler, 175,000 Btuh Input Natural or Propane

• AFUE's above 91%
• Sealed combustion or Direct
exhaust venting
• Factory Packaged 4 sizes
• PVC or stainless steel venting
• Multiple pass heat exchanger
• Cast iron primary heat exchanger
• Stainless steel condensing
Secondary heat exchanger
• Control module with indicator lights
• Hot surface ignition system
• Insulated heavy-gauge steel jacket

• Factory tested
• Cast iron sections with built-in air separator
• Stainless steel secondary heat exchanger
with air separator
• Blower assembly with observation port
• Electrical junction box
• 30 PSI ASME relief valve
• System circulator*
• Built-in-bypass circulator system with sensor
for temperature control*
• Negative regulation gas valve
• Gas/air orifice plate for natural gas
(separate plate provided with unit for
conversion to propane)
• Water treatment - inhibitor & test kit
• Concentric vent kit
• High altitude kit
• Condensation neutralizer kit

*Circulator supplied with boiler cannot be removed and cannot be used as a zone circulator in multiple zone systems.



 Residential Warranty

 Commercial Warranty


Input (MBH): 175
Output (MBH): 161
IBR (MBH): 140
AFUE: 91.0%
Recom. Pipe Size: 1-1/4"
Gas: 1/2"
FLUE: 3"
Dimensions (H x W x D): 30-3/4 x 24-5/8 x 37-3/4"
Weight: 464

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