• 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 air
fl
ow to meet
maximum sound level requirements.
Please contact LENNOX for noise level calculations at reduced airfl ow.
