Indoor unit
9. Sound Levels
9.2 Sound Power Levels
Model
ARNU48GBRZ4
ARNU76GB8Z4
ARNU96GB8Z4
ARNU48GBRZ4
100
90
80
70
60
50
40
30
20
125
250
500
1000
Octave Band Center Frequency (Hz)
14 _
Fresh Air Intake Unit
Sound Power Levels dB(A)
High Fan Speed
62
70
72
100
90
NR-90
80
NR-85
NR-80
70
NR-75
NR-70
60
NR-65
NR-60
50
NR-55
NR-50
40
NR-45
NR-40
30
NR-35
NR-30
20
2000
4000
8000
125
Octave Band Center Frequency (Hz)
Notes:
• Data is valid at diffuse field condition
• Data is valid at nominal operating condition
• Sound level can be increased in static pressure mode or
used air guide.
• Sound power level is measured on the rated condition in
the reverberation rooms.
• Sound level will vary depending on a range of factors such as
the construction (acoustic absorption coefficient) of particular
room in which the equipment in installed.
• Reference acoustic intensity 0dB = 10E-6μW/m
ARNU76GB8Z4
NR-90
NR-85
NR-80
NR-75
NR-70
NR-65
NR-60
NR-55
NR-50
NR-45
NR-40
NR-35
NR-30
250
500
1000
2000
4000
8000
2
ARNU96GB8Z4
100
90
80
70
60
50
40
30
20
125
250
500
1000
2000
4000
Octave Band Center Frequency (Hz)
NR-90
NR-85
NR-80
NR-75
NR-70
NR-65
NR-60
NR-55
NR-50
NR-45
NR-40
NR-35
NR-30
8000