Model
Sound Pressure Levels dB(A)
H M L
ARNU05GSB*4
30 29 28
ARNU07GSB*4
32 30 28
ARNU09GSB*4
34 32 28
ARNU12GSB*4
37 34 30
ARNU15GSB*4
40 36 32
ARNU18GSC*4
38 35 33
ARNU24GSC*4
43 39 35
Notes:
1. Sound measured at 1.5m away from the center of the unit
2. Operating condition|
- Power source : 220-240V 50Hz / 220V 60Hz
- Cooling : Indoor temperature (27°C DB, 19°C WB),
Outdoor temperature (35°C DB, 24°C WB) 
- Heating : Indoor temperature (20°C DB, 15°C WB),
Outdoor temperature (7°C DB, 6°C WB)
3. Reference accoustic pressure 0dB = 20μPa
4. 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.
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
10 
20 
30 
40 
50 
60 
70 
80 
63 125 250 500 1000 2000 4000 8000 
NC-15 
NC-20 
NC-25 
NC-30 
NC-35 
NC-40 
NC-45 
NC-50 
NC-55 
NC-60 
NC-65 
Approximate
Hearing
Threshold    
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
10 
20 
30 
40 
50 
60 
70 
80 
63 125 250 500 1000 2000 4000 8000 
NC-15 
NC-20 
NC-25 
NC-30 
NC-35 
NC-40 
NC-45 
NC-50 
NC-55 
NC-60 
NC-65 
Approximate
Hearing
Threshold    
Octave Band Center Frequency (Hz)
Octave Band Sound Pressure Level (0dB = 20μPa)
10 
20 
30 
40 
50 
60 
70 
80 
63 125 250 500 1000 2000 4000 8000 
NC-15 
NC-20 
NC-25 
NC-30 
NC-35 
NC-40 
NC-45 
NC-50 
NC-55 
NC-60 
NC-65 
Approximate
Hearing
Threshold