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1. Specifications
1-8 Noise Criterion Curves
Low Silhouette Duct Type
MODEL : S-26PF1U6
SOUND LEVEL :
HIGH 34 dB(A), NC 22 / LOW 27 dB(A), NC 18
CONDITION : Under the unit 4.9 ft.
SOURCE : 208 - 230 V, 1 Phase, 60 Hz
1761_U_I
60
50
40
30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
bar)
NC-50
NC-40
NC-30
NC-20
MODEL : S-36PF1U6
SOUND LEVEL :
HIGH 38 dB(A), NC 30 / LOW 31 dB(A), NC 21
CONDITION : Under the unit 4.9 ft.
SOURCE : 208 - 230 V, 1 Phase, 60 Hz
1762_U_I
60
50
40
30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63 125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB
(0 dB = 0.0002
bar)
NC-50
NC-40
NC-30
NC-20
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