VAH | 169
Vertical / Horizontal
Air Handler
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Acoustic Data
Sound Pressure Levels
Figure 45: Sound Pressure Measurement Location.
Model
Sound Pressure Levels dB(A)
High Fan Speed
Medium Fan Speed
Low Fan Speed
NJ Frames
ARNU123NJA4
42
41
39
ARNU183NJA4
42
42
41
ARNU243NJA4
43
42
41
ARNU303NJA4
44
43
42
ARNU363NJA4
45
44
43
NK Frames
ARNU423NKA4
46
44
41
ARNU483NKA4
49
47
41
ARNU543NKA4
50
49
47
Table 129: Vertical / Horizontal Air Handler Unit Sound Pressure Levels.
Figure 46: ARNU123NJA4, ARNU183NJA4, and ARNU243NJA4 Sound Pressure Level Diagrams.
• 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 construc-
tion (acoustic absorption coefficient) of a particular room in which the unit was
installed.
VERTICAL / HORIZONTAL AIR HANDLER
3.3ft
3.3f
t
Microphone
ARNU123NJA4
ARNU183NJA4
ARNU243NJA4
