Sound Data; Noise Levels; Sound Attenuators Reduction - Casals QUANTICA EEC Manual De Instalación, Operación Y Mantenimiento

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:
Nominal E.S.P.
air flow Ret. | Supp.
MOD.
Pa
m /h
3
045
4500 200 | 250
060
6000 200 | 250
080
8000 200 | 250
100
10000 200 | 250
130
13000 200 | 250
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, please refer to the our selection
software.
The sound attenuators are supplied in a dedicated section external to the base unit, thus increasing the total length of the unit
(depth and height of the section remain the same as the base unit).
Below are the additional section lengths according to size and profile, to be taken into account when calculating the final
length of the unit.
Additional dimensions sound attenuator section
045
MOD.
1000
Length
[mm]
Additional dimensions sound attenuator section
045
MOD.
Length
1020
[mm]
Octave band (Hz)
63 125 250 500
dB dB dB dB
64 66 54 59
68 64 50 55
57 52 56 64
74 70 56 61
71 67 53 58
(50 mm profile)
060
1000
(60 mm profile)
060
1020
1K 2K 4K
dB dB dB
61 51 30
56 45 24
68 59 37
61 50 29
59 48 27
080 100
1000 1000
080 100
1020 1020
EN
Lw Lp
8K
dB(A) dB(A)
dB
69 51
22
69 51
18
71 51
29
76 56
21
73 54
21
130
1000
130
1020
24