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1
1-8. Noise Criterion Curves
Concealed-Duct Type
MODEL
: SPW-UR124GH56 (A/B)
: STRONG 29 dB(A), NC 20 / WEAK 22 dB(A), NC 13
SOUND LEVEL
: Under the unit 1.5 m
CONDITION
: 220 - 230 - 240 V, Single Phase, 50 Hz
SOURCE
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEATING FOR
CONTINUOUS
NOISE
10
63
Frequency at center of sound pressure band (Hz)
: SPW-UR254GH56 (A/B)
MODEL
SOUND LEVEL
: STRONG 34 dB(A), NC 22 / WEAK 27 dB(A), NC 18
: Under the unit 1.5 m
CONDITION
: 220 - 230 - 240 V, Single Phase, 50 Hz
SOURCE
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEATING FOR
CONTINUOUS
NOISE
10
63
Frequency at center of sound pressure band (Hz)
SPW-U125H (N)
125
250
500 1000 2000 4000 8000
SPW-UR254SH56B
SPW-U255H (N)
SPW-U255SH (T)
125 250
500 1000 2000 4000 8000
MODEL
SOUND LEVEL
CONDITION
SOURCE
60
50
NC-50
40
NC-40
30
NC-30
20
APPROXIMATE
NC-20
THRESHOLD OF
HEATING FOR
CONTINUOUS
NOISE
10
Frequency at center of sound pressure band (Hz)
NC-50
NC-40
NC-30
NC-20
1-300
Both 50Hz / 60Hz
: SPW-UR164 / 184GH56 (A/B)
SPW-UR184SH56B
SPW-U165 / 185H (N)
SPW-U185SH (T)
: STRONG 30 dB(A), NC 23 / WEAK 25 dB(A), NC 17
: Under the unit 1.5 m
: 220 - 230 - 240 V, Single Phase, 50 Hz
63
125 250
500 1000 2000 4000 8000
Strong
Weak
NC-50
NC-40
NC-30
NC-20
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