251934-YTG-G-0708
Johnson Controls Unitary Products
69
Sound Performance
Electric Heat Multipliers
Voltage
kW Capacity Multipliers
1
1. Electric heaters are rated at nominal voltage. Use this table to determine the electric heat capacity for
heaters applied at lower voltages.
Nominal
Applied
240
208
0.75
230
0.92
480
460
0.92
600
575
0.92
ZJ/ZR/ZF Indoor Sound Power Levels
Size
(Tons)
CFM
ESP
(IWG)
Blower
Sound Power, dB (10
-12
) Watts
Sound Rating
1
dB (A)
1. These values have been accessed using a model of sound propagation from a point source into the hemispheric/free field. The dBA values
provided are to be used for reference only. Calculation of dBA values cover matters of system design and the fan manufacture has no way
of knowing the details of each system. This constitutes an exception to any specification or guarantee requiring a dBA value of sound data
in any other form than sound power level ratings.
Octave Band Centerline Frequency (Hz)
RPM
BHP
63
125
250
500
1000
2000
4000
8000
180
(15)
6000
1
1080
4.6
89
99
99
89
82
84
77
72
67
210
(17.5)
8000
1
1129
6.65
92
102
102
92
85
87
80
75
70
240
(20)
8000
1
1129
6.65
92
102
102
92
85
87
80
75
70
300
(25)
10000
1.3
1160
12.5
98
108
108
98
91
93
86
81
76