| AFUE | : | 82 % |
| BTU Heating Input Rating (Custom) | : | 120,000 BTU/h |
| BTU Heating Input Rating | : | 125,000 BTU/h |
| BTU Heating Output Rating (Custom) | : | 108,000 BTU/h |
| BTU Heating Output Rating | : | 103,000 BTU/h |
| Condensing | : | No |
| Depth | : | 27.625 in |
| Fuel Type | : | Natural Gas |
| Gas Connection Size | : | 1/2 in |
| Height | : | 33.75 in |
| Ignition Type | : | Intermittent Pilot |
| Inlet Connection Size | : | 2-1/2 in |
| Installation / Mounting Type | : | Floor Mount |
| Media / Fluid Type | : | Steam |
| Model Number | : | GSA |
| Outlet Connection Size | : | 3 in |
| Phase | : | 1 ph |
| Product Family | : | GSA Series |
| Shipping Weight | : | 505 lbs |
| Vent Type | : | Atmospheric |
| Voltage Rating | : | 120 V |
| Width | : | 21.25 in |
- gsa-series-2-gas-steam-atmospheric-boiler-manual-23622
- gsa-series-2-gas-steam-atmospheric-brochure-23621
- gsa-series-2-gas-steam-atmospheric-commercial-warranty-23624
- gsa-series-2-gas-steam-atmospheric-users-manual-23623
- williamson-gsa-series-2-specification-sheet-25491
- gsa-series-2-gas-steam-atmospheric-brochure-23621
- gsa-series-2-gas-steam-atmospheric-boiler-manual-23622
- gsa-series-2-gas-steam-atmospheric-users-manual-23623
- williamson-gsa-series-2-specification-sheet-25491
- gsa-series-2-gas-steam-atmospheric-commercial-warranty-23624