19
TECHNICAL DATA AND PERFORMANCES
Noise levels
Reference conditions
Performances referred to units operating in heating mode at nominal conditions A7W35.
Unit placed in free field on reflecting surface (directional factor equal to 2).
The sound power level is measured according to ISO 3744 standard.
The sound pressure level is calculated according to ISO 3744 and is referred to a distance of 1 meter from the external surface of the unit.
Model
Sound power levels [dB]
by octave bands [Hz]
Sound power
level
Sound pressure level
at 1 metre
at 5 metres at 10 metres
63
125
250
500 1000 2000 4000 8000
[dB]
[dB(A)]
[dB(A)]
[dB(A)]
[dB(A)]
5 .1
73,6
71,5
69,8
66,1
62,6
58,4
52,7
45,2
77
68
54
43
37
6 .1
73,6
71,5
69,8
66,1
62,6
58,4
52,7
45,2
77
68
54
43
37
7 .1
74,6
72,5
70,8
67,1
63,6
59,4
53,7
46,2
78
69
55
44
38
8 .1
74,6
72,5
70,8
67,1
63,6
59,4
53,7
46,2
78
69
55
44
38
10 .1
77,4
75,3
73,6
69,9
66,4
62,2
56,5
49,0
81
72
57
46
41
12 .1
77,4
75,3
73,6
69,9
66,4
62,2
56,5
49,0
81
72
57
46
41
15 .1
79,5
77,4
75,7
72,0
68,5
64,3
58,6
51,1
83
74
59
48
43
18 .1
79,5
77,4
75,7
72,0
68,5
64,3
58,6
51,1
83
74
59
48
43
