IDU-Compact Cassette 18
8. Noise Criterion Curves
8.1 Indoor Unit
Notes:
-Sound measured at 1.4m away from the noisiest location of the unit.
-Data is valid at free field condition
-Data is valid at nominal operation condition
-Reference acoustic pressure OdB = 20µPa
-Sound level will vary depending on a range of factors such as
the construction -(acoustic absorption coefficient) of particular
room
in which the equipment is installed.
-The operating conditions are assumed to be standard.
Model Sound Power dB(A)
Noise level dB(A)
H M L
MCA3U-18HRFNX-QRD0W
match with MOB30-18HFN8-
QRD0W
56 42.5 39 35.5
MCA3U-18HRFNX-QRD0W
match with MOB30-18HFN1-
QRD0W
57 42.5 39 35.5
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