Summary
The Radiant RSF 21 E/3S has a SAP seasonal efficiency rating of 80.3%.
The RSF 21 E/3S is a Non-Condensing Combi boiler with a maximum power output of 26.6kw that uses Gas as its fuel source.
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Specification
| Manufacturer | Radiant |
| Model | RSF 21 E/3S |
| Fuel Type | Gas |
| Type | Combi |
| Method | Non-Condensing |
| Flue Type | Room-Sealed |
| Fan | Fan Assisted |
| Output (KW) | 26.6 - 26.6 |
| Boiler ID | CE 0694BL3003 |
| Manufactured From/To | 2000 - current |
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