Mitsubishi Heavy Industries MHI FDU71VNXVF1 Technical Manual page 25

1.4 NOISE LEVEL
Notes(1) The data are based on the following conditions.
Ambient air temperature: Indoor unit 27℃WB. Outdoor unit 35℃DB.
(2) The data in the chart are measured in an anechoic room.
(3) The noise levels measured in the field are usually higher than the data because of reflection.
(1) Indoor units
Model FDU71VF1
Noise level 38 dB (A) at P-HIGH
33 dB (A) at HIGH
29 dB (A) at MEDIUM
25 dB (A) at LOW
60
50
40
30
20
10
63 125 250 500 1000
Mid Octave Band Frequency (Hz)
Model FDU140VF
Noise level 47 dB (A) at P-HIGH
40 dB (A) at HIGH
35 dB (A) at MEDIUM
30 dB (A) at LOW
60
50
40
30
20
10
63 125 250 500 1000
Mid Octave Band Frequency (Hz)
(2) Outdoor units
Measured based on JIS B 8616
Mike position: at highest noise level in position as mentioned below
Distance from front side 1m
Height
Model FDC71VNX
Cooling noise level 51 dB (A)
70
60
50
40
30
20
63 125 250 500 1000
Mid Octave Band Frequency (Hz)
Measured based on JIS B 8616
Mike position as right
Model FDU100VF1
Noise level 44 dB (A) at P-HIGH
60
60
50
50
40
40
30
30
20
20
10
10
2000 4000 8000
63 125
Mid Octave Band Frequency (Hz)
60
50
40
30
20
10
2000 4000 8000
1m
Heating noise level 48 dB (A)
70
70
60
60
50
50
40
40
30
30
20
20
2000 4000 8000
63 125
Mid Octave Band Frequency (Hz)
Air
38 dB (A) at HIGH
36 dB (A) at MEDIUM
30 dB (A) at LOW
60
50
40
30
20
10
250 500 1000 2000 4000 8000
70
60
50
40
30
20
250 500 1000 2000 4000 8000

- -
'12 • PAC-T-178
1m
2m
Unit
Return duct
Supply duct
1.5m
Mike (at center & below unit)
Model FDU125VF
Noise level 45 dB (A) at P-HIGH
40 dB (A) at HIGH
34 dB (A) at MEDIUM
29 dB (A) at LOW
60
50
40
30
20
10
63 125 250 500 1000
Mid Octave Band Frequency (Hz)
60
50
40
30
20
10
2000 4000 8000