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10.4 SOUND LEVEL
FAN MINIMUM SPEED: Extraquiet
Sound Power Level (dB)
Octave band (Hz)
63
125
250
500 1000 2000 4000 8000
22
62
56
49
42
31
66
57
50
41
41
73
59
50
40
FAN STANDARD SPEED: Quiet
Sound Power Level (dB)
Octave band (Hz)
63
125
250
500 1000 2000 4000 8000
22
62
57
51
42
31
66
58
51
42
41
73
58
52
41
FAN MAX SPEED: Powerful
Sound Power Level (dB)
Octave band (Hz)
63
125
250
500 1000 2000 4000 8000
22
62
59
53
43
31
65
61
53
44
41
71
65
54
45
Sound levels refer to the unit at full load installed on the ceiling, ducted, with
minimum, standard and maximum air flow rate of the fan. Available static pressure
40 Pa.
In accordance with the UNI-EN ISO 3744 regulation, the average sound pressure
level refers to a distance of 1 m from the outer surface of a ducted unit installed on
the ceiling.
Measurements are made in accordance to the UNI EN ISO
installed over two sound reflective surfaces.
If the unit is installed in conditions other than the nominal ones (for instance, near
walls or obstacles in general), sound levels may be subject to considerable
variations.
10 - INFORMATIONS TECHNIQUES
Sound
pressure
level
dB(A)
38
30
21
15
32
37
29
21
15
33
36
27
20
15
33
Sound
pressure
level
dB(A)
40
31
24
20
33
39
30
23
18
34
38
30
22
15
34
Sound
pressure
level
dB(A)
42
34
28
22
35
42
34
28
22
36
42
35
28
23
37
9614-2, with units
Sound
power
Level
dB(A)
46
46
47
Sound
power
Level
dB(A)
47
47
48
Sound
power
evel
dB(A)
48
49
51
40
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