Part III Efficiency requirements to be met both at nominal output and at part load 0.3 Pn
| Label | Efficiency requirement at nominal output Pn and at an average boiler-water temperature of 70°C % | Efficiency requirement at part load of 0.3 Pn and at an average boiler-water temperature of ≥50°C % |
|---|---|---|
| ★ | ≥84 + 2 log Pn | ≥80 + 3 log Pn |
| ★★ | ≥87 + 2 log Pn | ≥83 + 3 log Pn |
| ★★★ | ≥90 + 2 log Pn | ≥86 + 3 log Pn |
| ★★★★ | ≥93 + 2 log Pn | ≥89 + 3 log Pn |