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Sound levels
Sound pressure level:
Sound pressure level is defi ned as the sound level, which at an ear
level of 1.8 metres, is perceived one metre from the heat pump.
Measured in a sound measurement room without echo at an
outdoor temperature of +7ºC and 50ºC fl ow temperature.
Example:
When the heat pump is installed outside with free sound propaga-
tion the sound level drops by 6dBa with each doubling of distance.
Technical information
Sensor table
The table shows all sensor resistance at different temperatures.
Temperature (ºC) kΩ
-40 154.300
-35 111.700
-30 81.700
-25 60.400
-20 45.100
-15 33.950
-10 25.800
-5 19.770
0 15.280
5 11.900
10 9.330
15 7.370
20 5.870
25 4.700
30 3.790
35 3.070
40 2.510
45 2.055
50 1.696
55 1.405
60 1.170
65 0.980
70 0.824
75 0.696
80 0.590
85 0.503
90 0.430
Example Greensource 6 kW
Distance Lp - ear (dBa)
1 metr
es 49
2 metres 43
4 metres 37
8 metres 31
Heat pump
Sound pressure level
Lp - ear (dBa)
Gr
eensource 6 kW 49
Greensource 7 kW 49
Gr
eensource 9.5 kW 53
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