Description
Note: product title indicates boiler’s Net AHRI (Net IBR) rating.
Williamson GSA series boilers are a cost-effective and feature-rich solution for replacing most gas steam boilers on the market. They are fully packaged, low-profile (with built-in draft diverter) and use high quality components for quick and easy installation & worry-free performance.
An optional near boiler piping kit is available for simplified installation.
Boiler is fully packaged and includes rear baffle with automatic vent damper & spill switch, Honeywell/Resideo gas valve & PA404A series pressure controller, UTEC intermittent pilot ignition module, Hydrolevel Safgard 400 model LWCO, gauge glass, pressure gauge, 15 psi ASME PRV, drain valve and more.
Features:
- Manufactured in the USA
- Factory-packaged and assembled
- Premium-level & familiar controls – Honeywell/Resideo Gas Valve & PA404A series Pressure Controller, UTEC Intermittent Pilot Ignition Module, Hydrolevel Safgard 400 model LWCO, Field Controls damper and others
- Compact & clean design, with integral rear draft diverter
- Stainless steel burners
- Integral cast iron legs
- One-piece front access door for easy service
- Insulated heavy-gauge jacket
- Left-side piping
- Approved for up to 2,000ft altitude installations (up to 4,500ft with optional kit)
Technical Specifications:
- Input (BTU): 100,000
- Net AHRI Rating (BTU): 62,000 (258 sq. ft)
- DOE Heating Capacity (BTU): 82,000
- Efficiency (AFUE): 82.0%
- Fuel Type: Natural Gas
- Boiler/System Type: Steam Cast Iron Gas Boiler
- Boiler Connections: 2″ NPT Supply, 1-1/2″ NPT Return Connections; 3/4″ NPT – Relief Valve, 3/4″ NPT – Drain, 1/2″ NPT – Gas
- Relief Valve Setting: 15 psi (max)
- Boiler Water Volume (Gal): 8.4
- Vent Type: Chimney (Atmospheric) Vent
- Vent Pipe Size: 5″ (standard Cat I galvanized chimney vent pipe)
- Electrical: 120V, 1-phase, 60Hz
- Dimensions: 17″ Wide x 28″ Deep (40″ with draft diverter) x 34″ High (without vent damper)
- Weight: 430 lbs (approx. ship weight)
Warranty:
10 year heat exchanger, 1 year all other parts






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