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Due to our policy of continuous product innovation, some specications may change without notication.
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20 | PRODUCT DATA
Single Zone Vertical Air Handling Unit Engineering Manual
ACOUSTIC DATA
Indoor Units
• Measurements are taken 3.3 ft away from the front of the unit.
• Sound pressure levels are measured in dB(A) with a tolerance of ±3.
• Sound pressure levels are tested in an anechoic chamber under ISO
Standard 3745.
Operating Conditions:
• Power source: 220V/60 Hz
• Sound level will vary depending on a range of factors including the
construction (acoustic absorption coefficient) of a particular room in
which the unit was installed.
3.3ft
3.3ft
Microphone
Figure 8: Sound Pressure Measurement Location.
Table 7: Vertical Air Handling Unit Indoor Unit Sound Pressure Levels.
Model Sound Pressure Levels dB(A)
High Fan Speed Medium Fan Speed Low Fan Speed
NJ Frames
LVN180HV4 42 42 41
LVN240HV4 43 42 41
NK Frames
LVN360HV4 45 44 43
LVN420HV 48 45 44
LVN480HV 49 48 44
Indoor Unit Sound Pressure Levels
Indoor Unit Sound Pressure Measurement
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