• 32 •
NAC
125
Hz
250
Hz
500
Hz
1000
Hz
2000
Hz
4000
Hz
8000
Hz
EUROVENT
Lw dB(A)
(1)
Lp dB(A)
200
68 79 83 85 82 75 68
89
58
230
68 80 84 85 82 76 68
89
58
270
68 80 84 85 83 76 68
89
58
300
70 82 85 87 84 78 70
91
60
340
70 82 85 87 84 78 70
91
60
380
70 82 86 87 84 78 70
91
60
420
71 83 87 88 85 79 71
92
61
480
71 83 87 88 86 79 71
92
61
540
71 83 87 89 87 80 71
93
62
600
72 83 88 90 88 81 72
94
63
640
72 83 88 90 88 81 72
94
63
680
73 85 88 90 87 81 73
94
63
760
73 85 89 90 88 81 73
94
63
840
74 86 90 91 88 82 74
95
64
960
74 86 90 91 89 82 74
95
64
1080
74 86 90 92 90 83 74
96
65
NAC
NAH
125
Hz
250
Hz
500
Hz
1000
Hz
2000
Hz
4000
Hz
8000
Hz
EUROVENT
Lw dB(A)
(1)
Lp dB(A)
200
68 79 83 85 82 75 68
89
58
230
68 80 84 85 82 76 68
89
58
270
70 82 85 87 84 78 70
91
60
300
70 82 85 87 84 78 70
91
60
340
70 82 85 87 84 78 70
91
60
380
71 83 87 88 85 79 71
92
61
420
71 83 87 88 85 79 71
92
61
480
71 83 87 88 86 79 71
92
61
NAH
A = 2(L+2d)(h+d)+2(l+2d)(h+d)+(L+2d)(l+2d)
d
d
h+d
L+ 2d
l+ 2d
Application Guide / NEOSYS-AGU-1801-E
ACOUSTIC DATA
Spectrum per octave band dB(A)
Maximum global sound
power
Maximum sound
pressure at 10 meters
envelopping surface
Spectrum per octave band dB(A)
Maximum global sound
power
Maximum sound
pressure at 10 meters
envelopping surface
(1) : For information only: Data calculated by enveloping envelopping surface method in free open fi eld.
Enveloping Surface
IMPORTANT NOTE : Thanks to variable speed fans, maximum sound level can be reduced.
NEOSYS maximum air fl ow can be adjusted between 70 % and 100 % of the nominal airfl ow to meet
maximum sound level requirements.
Please contact LENNOX for noise level calculations at reduced airfl ow.
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