37
NOISE LEVELS
The noise levels refer to units operating in the nominal conditions (water temperature: inlet: 12°C - outlet: 7°C, Outdoor air tempera-
ture: inlet: 30°C - outlet: 35°C).
The acoustic pressure levels are measured 1/ 5 / 10 meters away from the outer surface of the unit operating in the free field and
resting on a reflecting surface (directional factor of 2).
Standard Unit AB
MOD.
SWL (dB)
SPL [dB(A)]
Octave bands (Hz)
Total
63
125
250
500
1000
2000
4000
8000
dB
dB(A)(E)
1 m
5 m
10 m
350.5
99.2
95.5
95.4
93.0
90.2
85.5
80.1
72.0
103
95
75
67
63
390.6
99.2
95.5
95.4
93.0
90.2
85.5
80.1
72.0
103
95
75
67
63
440.6
100.4
98.2
95.8
93.4
90.9
87.9
80.1
70.6
104
96
76
68
64
490.6
100.4
98.2
95.8
93.4
90.9
87.9
80.1
70.6
104
96
76
68
64
560.6
101.4
99.2
96.8
94.4
91.9
88.9
81.1
71.6
105
97
77
69
65
630.6
101.4
99.2
96.8
94.4
91.9
88.9
81.1
71.6
105
97
77
69
65
Low noise unit AS
MOD.
SWL (dB)
SPL [dB(A)]
Octave bands (Hz)
Total
63
125
250
500
1000
2000
4000
8000
dB
dB(A)(E)
1 m
5 m
10 m
350.5
95.4
93.0
90.8
86.3
83.4
79.8
71.3
62.0
99
89
69
61
57
390.6
95.4
93.0
90.8
86.3
83.4
79.8
71.3
62.0
99
89
69
61
57
440.6
95.1
91.2
90.3
88.2
85.1
80.0
73.4
65.9
98
90
70
62
58
490.6
95.1
91.2
90.3
88.2
85.1
80.0
73.4
65.9
98
90
70
62
58
560.6
96.1
92.2
91.3
89.2
86.1
81.0
74.4
66.9
99
91
71
63
59
630.6
96.1
92.2
91.3
89.2
86.1
81.0
74.4
66.9
99
91
71
63
59
Extra low moise unit AX
MOD.
SWL (dB)
SPL [dB(A)]
Octave bands (Hz)
Total
63
125
250
500
1000
2000
4000
8000
dB
dB(A)(E)
1 m
5 m
10 m
350.5
92.4
90.0
87.8
83.3
80.4
76.8
68.3
59.0
96
86
66
58
54
390.6
92.4
90.0
87.8
83.3
80.4
76.8
68.3
59.0
96
86
66
58
54
440.6
94.2
91.9
89.4
85.3
81.0
74.6
67.0
58.6
97
87
67
59
55
490.6
94.2
91.9
89.4
85.3
81.0
74.6
67.0
58.6
97
87
67
59
55
560.6
92.4
90.1
88.6
86.0
83.3
77.8
71.2
62.8
96
88
68
60
56
630.6
92.4
90.1
88.6
86.0
83.3
77.8
71.2
62.8
96
88
68
60
56
(E):
Data declared according to
EUROVENT LCP
certification programme. The values are for units without options and accessories.
Open field
Q=2
SwL
= Sound power levels, with reference to 1x10
-12
W.
The Total sound power level in
dB(A)
measured in compliance
with
ISO 9614
standards, is certified according to the
Eurovent
certification program and it is the only mandatory value (the va-
lues of octave band in the table are indicative).
Eurovent certification
(E)
exclusively refers to the
Total
Sound
Power in
db(A)
, which is therefore the only binding acoustic spe-
cification (the values of the Octave bands in the table are indi-
cative).
SPL
= Sound pressure levels, with reference to 2x10
-5
Pa.
The sound pressure levels are values calculated by applying the
ISO-3744 relation (Eurovent 8/1)
and refer to a distance of 1
meter away from the external surface of units operating in the
open field with directivity factor 2 (Q=2) and the units operating
in nominal conditions in the cooling mode.
Summary of Contents for RHA series
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