5167821-YTG-K-1118
102 Johnson Controls Ducted Systems
Unit description/model ZT120
Test configuration Horizontal (side supply) ducted discharge
External static pressure (IWG) 0.4 1.0 1.6 2.0
Nominal airflow (CFM) 4000 3800 3600 3400
Octave band center frequency
(Hz)
Full stage cooling operation
(dB)
1
Full stage cooling operation
(dB)
1
Full stage cooling operation
(dB)
1
Full stage cooling operation
(dB)
1
63 90 91 91 91
125 84 86 87 87
250 77 78 80 82
500 71 72 74 75
1000 69 71 74 75
2000 67 69 71 73
4000 66 68 70 72
8000 60 62 64 66
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
Unit description/model ZT150
Test configuration Horizontal (side supply) ducted discharge
External static pressure (IWG) 0.4 1.0 1.6 2.0
Nominal airflow (CFM) 4600 4400 4200 4000
Octave band center frequency
(Hz)
Full stage cooling operation
(dB)
1
Full stage cooling operation
(dB)
1
Full stage cooling operation
(dB)
1
Full stage cooling operation
(dB)
1
63 87 88 89 90
125 83 85 86 88
250 75 76 77 78
500 73 74 75 76
1000 70 72 74 75
2000 70 71 73 74
4000 66 68 70 71
8000 60 61 63 65
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
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