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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