Airwell DFO 5 - 9 - 17, Installation And Operation Manual

Page: 40 / 45

10 - TECHNICAL INFORMATION
10.4 SOUND LEVEL
FAN MINIMUM SPEED: Extraquiet
Size
Sound Power Level (dB)
Sound
pressure
level
Sound
power
Level
Octave band (Hz)
63 125 250 500 1000 2000 4000 8000 dB(A) dB(A)
5
62 56 49 42 38 30 21 15
32 46
9
66 57 50 41 37 29 21 15
33 46
17
73 59 50 40 36 27 20 15
33 47
FAN STANDARD SPEED: Quiet
Size
Sound Power Level (dB)
Sound
pressure
level
Sound
power
Level
Octave band (Hz)
63 125 250 500 1000 2000 4000 8000 dB(A) dB(A)
5
62 57 51 42 40 31 24 20
33 47
9
66 58 51 42 39 30 23 18
34 47
17
73 58 52 41 38 30 22 15
34 48
FAN MAX SPEED: Powerful
Size
Sound Power Level (dB)
Sound
pressure
level
Sound
power
evel Octave band (Hz)
63 125 250 500 1000 2000 4000 8000 dB(A) dB(A)
5
62 59 53 43 42 34 28 22
35 48
9
65 61 53 44 42 34 28 22
36 49
17
71 65 54 45 42 35 28 23
37 51
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 9614-2, with units
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.