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The Boiler (Efficiency) Regulations 1993
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- UK Statutory Instruments
- 1993 No. 3083
- SCHEDULE 2
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Regulation 2(1)
SCHEDULE 2THE EFFICIENCY REQUIREMENTS
Boilers must comply with the useful efficiency requirements set out in the Table below —
(a)at rated output, that is, operating at rated output Pn expressed in kW, at an average boiler-water temperature of 70°C, and
(b)at part load, that is, operating at 30% part load, at an average boiler-water temperature which varies according to the type of the boiler.
Table
| Type of boiler | Range of power output | Efficiency at rated output | Efficiency at part load | ||
|---|---|---|---|---|---|
| kW | Average boiler-water temperature expressed in °C | Efficiency requirement expressed in % | Average boiler-water temperature expressed in °C | Efficiency requirement expressed in % | |
* Including condensing boilers using liquid fuels. | |||||
** Temperature of boiler water supply. | |||||
| Standard boilers | 4 to 400 | 70 | ≥84 + 2 log Pn | ≥50 | ≥80 + 3 log Pn |
| Low temperature boilers* | 4 to 400 | 70 | ≥87.5 + 1.5 log Pn | 40 | ≥87.5 + 1.5 log Pn |
| Gas condensing boilers | 4 to 400 | 70 | ≥91 + 1 log Pn | 30** | ≥97.1 + 1 log Pn |
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