Sound values

Table 1. Sound power level in the supply air duct
Sound power level in the supply air duct by octave band LW´ dB
Adjustment position 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Medium frequency of the octave band Hz 63 58 60 62 64 66 68 73 81 81 81
125 47 52 57 59 62 65 67 68 68 68
250 44 50 55 57 64 62 65 67 67 67
500 39 46 52 54 57 59 62 65 66 67
1000 32 40 45 48 52 56 59 64 64 64
2000 21 30 37 42 45 48 51 53 53 53
4000 18 22 30 36 42 46 49 52 52 52
8000 21 21 23 27 34 40 44 48 48 48

LW´ dB

58 61 64 66 70 71 75 82 82 82

LWA´ dB(A)

41 47 52 55 59 61 64 67 68 68
Table 2. Sound power level in the extract air duct
Sound power level in the extract air duct by octave band LW´ dB
Adjustment position 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Medium frequency of the octave band Hz 63 52 52 55 55 59 61 72 70 72 72
125 52 52 54 55 56 58 60 62 62 62
250 30 33 39 42 44 47 50 51 52 51
500 30 38 40 42 46 49 50 54 56 55
1000 20 27 31 34 37 39 42 45 46 46
2000 13 15 20 24 28 30 33 35 36 36
4000 17 17 17 18 18 19 21 23 23 23
8000 21 21 21 21 21 21 21 21 21 21

LW´ dB

55 55 58 58 61 63 72 71 73 73

LWA´ dB(A)

37 39 42 44 46 49 51 54 55 55
Table 3. Sound pressure level coming through the envelope of the unit in the room in which it is installed (10m² sound absorption)
Vallox 51 MV, Vallox 51K MV (no standard extraction through the hood in the kitchen)
Adjustment position 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
LpA, dB (A) 21 24 28 29 32 35 38 40 40 40
Vallox 51K MV (standard extraction 8 dm³/s through the hood in the kitchen)
Adjustment position 22% 40%
LpA, dB (A) 28 32

Sound values have been measured at the measurement points of the facility curve (L) of the air flow graph. The values change very little when the pressure loss in the ducts is low and the fan settings remain unchanged. The sound values increase when the pressure loss in the ducts increase.