Division 1.4 Requirements for sound power level
United Kingdom
From 26 September 2015 the sound power level of heat pump water heaters shall not exceed the following values:
| Rated heat output ≤ 6 kW | Rated heat output > 6 kW and ≤ 12 kW | Rated heat output > 12 kW and ≤ 30 kW | Rated heat output > 30 kW and ≤ 70 kW | ||||
|---|---|---|---|---|---|---|---|
| Sound power level (LWA ), indoors | Sound power level (LWA ), outdoors | Sound power level (LWA ), indoors | Sound power level (LWA ), outdoors | Sound power level (LWA ), indoors | Sound power level (LWA ), outdoors | Sound power level (LWA ), indoors | Sound power level (LWA ), outdoors |
| 60 dB | 65 dB | 65 dB | 70 dB | 70 dB | 78 dB | 80 dB | 88 dB |