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 Submittal Sheet (Inch / Metric)
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The model NP is similar to the NT, the difference being the lack of air direction control. In an application where a flooding or dumping of conditioned air is required without the need to control it, the NP essentially functions as a finish piece for the system, whether used in exposed ductwork or surface mounted.*

*Note: NT & NP are designed for wall mounting. Screws must be used for ceiling mounting.
Material
 Heavy-Gauge Anodized Aluminum
Finish
 Anodized (Custom Colors Available)
Sizes
 4" 6" 8" 10" 12" 14" 16" 20" 24"
Features
 Anodized Aluminum Body
 Long Throw Capability
 High Airflow Capacity
 Available For Standard Ducts

Model NP Dimensions (PDF Version)

MODEL DUCT SIZE A B C D E
NP 4 4" 4 3/4 3 5/8 5/8 2 1/2
NP 6 6" 7 3/16 5 17/32 7/8 3 11/12 11/16
NP 8 8" 9 13/32 7 17/32 1 4 1/4 3/4
NP 10 10" 11 7/8 9 1/2 1 1/4 5 1/16 15/16
NP 12 12" 14 11/32 11 15/32 1 1/2 4 7/8 1 1/8
NP 14 14" 16 5/8 13 7/16 1 21/32 4 3/4 1 7/32
NP 16 16" 18 25/32 15 13/32 1 3/4 4 11/16 1 5/16
NP 20 20" 23 7/16 19 9/16 2 6 1/2 1 1/2
NP 24 24" 27 7/16 23 9/16 2 6 1/2 1 1/2
Dimensions are in inches. Product information is Subject to Change Without Notice


Performance Data (PDF Version)

SIZE Neck Velocity (fpm) 250 500 750 1000 1250 1500
Velocity Pressure (in., wg) 0.004 0.016 0.035 0.062 0.097 0.140
Total Pressure 0.023 0.058 0.115 0.167 0.257 0.333
4 Neck Area
0.062
sq.ft.
CFM 20 40 50 70 80 100
NC - - - - 15 16
Throw (ft.) 9 11 15 17 18 20
6 Neck Area
0.144
sq.ft.
CFM 40 80 110 150 180 220
NC - - - - 15 16
Throw (ft.) 12 16 20 22 24 27
8 Neck Area
0.27
sq.ft.
CFM 70 140 210 270 340 410
NC - - - - 15 16
Throw (ft.) 12 19 23 26 29 33
10 Neck Area
0.43
sq.ft.
CFM 110 220 330 430 540 650
NC - - - - 15 16
Throw (ft.) 13 21 25 29 33 36
12 Neck Area
0.632
sq.ft.
CFM 160 320 480 640 790 950
NC - - - - 15 16
Throw (ft.) 15 23 28 31 35 40
14 Neck Area
0.86
sq.ft.
CFM 220 430 650 860 1080 1290
NC - - - - 15 16
Throw (ft.) 16 23 29 33 38 45
16 Neck Area
1.156
sq.ft.
CFM 290 580 870 1160 1450 1740
NC - - - - 14 16
Throw (ft.) 16 23 28 34 37 42
20 Neck Area
1.88
sq.ft.
CFM 470 940 1410 1880 2350 2820
NC - - - - 15 16
Throw (ft.) 17 23 27 33 36 42
24 Neck Area
2.7
sq.ft.
CFM 680 1350 2030 2700 3380 4050
NC - - - - 15 16
Throw (ft.) 17 22 28 33 36 44
THE THROW VALUES ARE BASED ON A 50 FPM TERMINAL VELOCITY.
DASHED LINE IN SP BOX INDICATES STATIC PRESSURE IS LESS THAN 0.01 IN.W.G.
DASHED LINE IN NC BOX INDICATES NOISE LEVEL IS LESS THAN 20.
NC LEVEL IS BASED ON 10dB ROOM ATTENUATION(PWL RE:10-12 WATTS) WITH ONE DIFFUSER OPERATING.

*Seiho International reserves the right to make changes without prior notice.
*This performance data is proprietary to Seiho International, Inc., and shall not be used except as expressly authorized by the company.

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