| AFUE | : | 84 % |
| BTU Heating Input Rating (Custom) | : | 96,000 BTU/h |
| BTU Heating Input Rating | : | 100,000 BTU/h |
| BTU Heating Output Rating (Custom) | : | 84,000 BTU/h |
| BTU Heating Output Rating | : | 85,000 BTU/h |
| Condensing | : | No |
| Fuel Type | : | Natural Gas |
| Gas Connection Size | : | 1/2 in |
| Height | : | 54.375 in |
| Ignition Type | : | Intermittent Pilot |
| Inlet Connection Size | : | 1-1/4 in |
| Installation / Mounting Type | : | Floor Mount |
| Media / Fluid Type | : | Water |
| Model Number | : | GWA |
| Number of Stages | : | Single-Stage |
| Outlet Connection Size | : | 1-1/4 in |
| Phase | : | 1 ph |
| Product Family | : | GWA Series |
| Vent Type | : | Atmospheric |
| Voltage Rating | : | 120 V |
| Width | : | 13 in |
- gwa-series-3-boiler-manual-23627
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- residential-warranty-manufactured-on-or-after-5-2-16-23630
- williamsonthermoflo-specification-sheet-24876
- gwa-series-3-brochure-23626
- gwa-series-3-boiler-manual-23627
- williamsonthermoflo-specification-sheet-24876
- gwa-series-3-use-and-care-manual-23628
- residential-warranty-manufactured-on-or-after-5-2-16-23630