Airwell EFL 100-3R410, Technical Manual, Page: 253 / 328

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3-WAY FLOW LOGIC Unit Specifications
7. Concealed Duct Hi g h Static Pressure Type
MODEL : ST-NDHP 76
SOUND LEVEL : HIGH 4 8 dB(A), NC 42
CONDITION : Under the unit 1.5 m
SOURCE : 220 - 230 - 240 V, 1 Phase, 50 Hz
MODEL : ST-NDHP 96
SOUND LEVEL : HIGH 51 dB(A), NC 43
CONDITION : Under the unit 1.5 m
SOURCE : 220 - 230 - 240 V, 1 Phase, 50 Hz
REMARK S : 1. Value obtained in the actual place
where the unit is installed may be
slightly higher than the values shown in
this graph because of the conditions of
operation, the structure of the building,
the background noise and other factors.
2. The test results were obtained from an
anechoic room.
NOTE
To evaluate the noise level, the maximum value of the measured sound pressure level is used. Read the value at
each frequency level (on horizontal axis, center of the sound pressure band) from 63 Hz to
8 000 Hz, and select
the corresponding maximum value indicated on the vertical axis.
Sound Pressure Le
v
el (dB)
(0 dB = 0.0002
μ
bar)
Frequency at center of sound pressure band (Hz) Frequency at center of sound pressure band (Hz)
04-218 Airwell-4_6-7.qxp 01/06/2007 13:24 Page 120