24
1000
200 | 250
42
56
54
57
62
54
31
19
65
49
2000
200 | 250
58
65
55
51
53
44
22
12
67
50
3000
200 | 250
53
63
44
47
47
38
18
9
63
46
4500
200 | 250
64
66
54
59
61
51
30
20
70
52
6000
200 | 250
67
63
49
54
55
44
23
15
69
51
8000
200 | 250
54
50
53
61
65
56
34
26
67
49
10000
200 | 250
28
48
49
57
68
56
48
32
69
50
13000
200 | 250
70
66
52
57
57
47
25
20
72
52
17000
200 | 250
57
52
56
64
68
59
37
31
70
50
21500
200 | 250
59
65
59
61
68
56
39
33
71
50
INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - VORT NRG MEGA-R SERIES
1000
2000
3000
4500
6000
8000
10000
13000
17000
24000
11. SOUND DATA
The noise level of units is basically due to the fan rotation speed.
Obviously, with the same air flow rate, the fan speed will be lower if the required static pressure is low, while it will be higher (and
therefore noisier) if the required static pressure is higher.
11.1 Noise levels
The table below shows the sound levels of the units at the nominal working conditions:
Octave band (Hz)
Lw
Lp
MOD.
Nominal
air flow
E.S.P.
Ret. | Supp.
63
125
250
500
1K
2K
4K
8K
dB(A)
dB(A)
m
3
/h
Pa
dB
dB
dB
dB
dB
dB
dB
dB
Lw: sound power level calculated in accordance with EN 3744
Lp: sound pressure level measured in free field at 1 m from the unit, directionality factor Q=2, according to EN 3744 with ducted unit.
11.2 Sound attenuators reduction
The sound attenuators are of sound-absorbing baffles type. They are suitable for reducing the noise that propagates through the
ventilation systems in the aeraulic ducts.
To check the sound absorpion data to the various octave band frequencies, refer to the online selection software.
