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3
Performance data
Water to Water heat pump (WTW)
90
80
70
60
50
40
30
APPROXIMATE
THRESHOLD OF
20
HEARING FOR
CONTINUOUS
NOISE
10
63
125
250
500
BAND CENTRE FREQUENCIES, Hz
Pump speed: 5
Flow rate: 20L/min
SPL: 27dB
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000
2000
4000
8000
B-37
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