8
Table 6.c Sound level
Total noise measured in reverberation chamber at ELTA FANS laboratory (UK)
dBA figures are average spherical free-field, for comparitive use only.
6.2 Before Starting the System
When the installation is finished, check that:
• Filters are mounted correctly
• The unit is installed in accordance with the instructions
• The unit is correctly wired
• Eventual outdoor and exhaust air dampers and silencers are installed and that the duct system is correctly connected to the
unit.
• All ducts are sufficiently insulated and installed according to local rules and regulations.
• Outdoor air intake is positioned with sufficient distance to pollution sources (kitchen ventilator exhaust, central vacuum system
exhaust or similar).
• The unit is correctly set and commissioned.
100%
Lw dB - SOUND POWER OCTAVE BAND
Lp dB(A)
63
125
250
500
1 K
2 K
4 K
8K
Tot
@3m
Intake
57
62
69
64
58
56
49
46
71
45
Supply
56
62
65
61
55
50
40
31
68
41
Extract
57
61
65
60
55
49
41
32
68
41
Exhaust
59
64
68
62
57
57
54
47
71
44
Breakout
56
61
64
59
58
50
40
35
68
41
80%
Lw dB - SOUND POWER OCTAVE BAND
Lp dB(A)
63
125
250
500
1 K
2 K
4 K
8K
Tot
@3m
Intake
55
59
65
60
53
50
44
40
67
41
Supply
55
59
62
57
51
44
35
28
65
37
Extract
55
58
62
55
51
43
35
28
65
37
Exhaust
58
61
65
58
53
52
49
41
68
40
Breakout
55
58
60
55
53
45
35
28
64
37
60%
Lw dB - SOUND POWER OCTAVE BAND
Lp dB(A)
63
125
250
500
1 K
2 K
4 K
8K
Tot
@3m
Intake
52
55
61
51
45
42
36
31
63
34
Supply
51
54
56
47
42
37
27
25
59
30
Extract
51
54
57
46
42
35
27
23
60
30
Exhaust
52
57
61
49
45
44
40
32
63
34
Breakout
51
54
55
45
44
37
29
24
59
29
40%
Lw dB - SOUND POWER OCTAVE BAND
Lp dB(A)
63
125
250
500
1 K
2 K
4 K
8K
Tot
@3m
Intake
47
50
50
42
35
32
25
22
54
24
Supply
47
48
48
38
33
27
22
20
53
21
Extract
47
49
48
37
33
25
20
20
53
21
Exhaust
49
51
54
40
36
34
28
23
57
26
Breakout
47
48
46
37
34
30
22
19
52
21