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Seiho's model NR-B utilizes a widely-spaced blade design for high capacity, long throw air flow in a double deflection grille. The linked blades facilitate air direction control. The NR-B can be wall mounted securely with its mounting bracket. Excellent for use where high volume air streams are needed such as airport concourses, hotel lobbies, and convention halls.
Material
Heavy-Gauge Aluminum
Finish
Gloss White or Mill Finish (Custom Colors Available)
Sizes
6" 8" 10" 12" 14" 16" 20" 24"
NR-B Download
Catalog
Submittal Sheet (
Inch
/
Metric
)
Performance Data (
Inch
/
Metric
)
Revit Files
High Resolution Picture
Installation Instruction
Features
Contemporary Design
Long Air Throws
Wide Dispersion Patterns
Double Deflection Design
Concealed Mounting Mechanism
Available for Standard Duct Sizes
Heavy Gauge Aluminum Body
Extruded Aluminum Airfoil Blades
Adjustable Blades
The NR-B's front and rear linked blades are independently adjustable to provide numerous dispersion patterns.
Airflow Smoke Patterns Tests (YouTube)
Related Product:
BS Butterfly Damper >>
Linked Airfoil Blades
Endeavor Talent Agency: Beverly Hills, CA (RHV10)
Toy Loft: Los Angeles, CA (NR12B)
Excelsior Caffe: Tokyo, Japan (RHV12)
Model NR-B Dimensions
(PDF Version)
MODEL
DUCT
SIZE
A
B
C
D
E
F
G
NR 6B
6"
7 5/8
5 13/16
1 7/32
4 9/32
15/32
5 1/2
1 5/16
NR 8B
8"
10
7 25/32
1 13/32
4 9/32
15/32
5 1/2
1 7/16
NR 10B
10"
12 5/8
9 3/4
1 25/32
4 13/32
19/32
5 1/2
1 7/8
NR 12B
12"
14 19/32
11 23/32
1 25/32
4 13/32
19/32
5 1/2
1 29/32
NR 14B
14"
16 9/16
13 11/16
1 25/32
4 13/32
19/32
5 1/2
1 29/32
NR 16B
16"
18 17/32
15 21/32
1 25/32
4 13/32
19/32
5 1/2
1 29/32
NR 20B
20"
23 5/8
19 23/32
2 3/8
4 31/32
29/32
6 11/16
1 29/32
NR 24B
24"
27 9/16
23 11/16
2 3/8
4 31/32
29/32
6 11/16
1 29/32
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
0.029
0.076
0.096
0.165
0.200
0.247
0.292
0.387
0.417
0.540
0.570
Deflection
0
22.5
0
22.5
0
22.5
0
22.5
0
22.5
0
22.5
6
Neck Area
sq.ft
0.196
CFM
50
100
150
200
250
300
NC
-
-
-
-
-
20
24
34
32
40
37
43
Throw
10
9
13
12
17
15
19
17
22
19
24
22
8
Neck Area
sq.ft
0.349
CFM
90
180
270
350
440
530
NC
-
-
-
18
22
26
25
32
40
Throw
13
12
18
17
22
20
25
23
27
25
31
28
10
Neck Area
sq.ft
0.545
CFM
140
280
410
550
690
820
NC
-
-
-
15
15
21
20
26
26
33
Throw
16
14
23
20
28
25
31
28
36
32
36
33
12
Neck Area
sq.ft
0.785
CFM
200
400
590
790
990
1180
NC
-
-
-
-
16
22
22
32
31
38
35
48
Throw
19
17
27
24
32
30
38
34
41
39
43
41
14
Neck Area
sq.ft
1.069
CFM
270
540
810
1070
1340
1610
NC
-
-
-
-
16
29
24
32
29
34
37
45
Throw
22
21
32
28
38
35
44
40
49
44
54
47
16
Neck Area
sq.ft
1.396
CFM
350
700
1050
1400
1750
2100
NC
-
-
-
-
19
27
29
34
32
41
37
45
Throw
25
23
36
31
43
39
51
45
56
52
63
55
20
Neck Area
sq.ft
2.182
CFM
550
1100
1640
2190
2730
3280
NC
-
-
-
-
19
27
30
34
32
40
38
47
Throw
31
27
44
41
54
49
63
57
70
64
74
71
24
Neck Area
sq.ft
3.142
CFM
790
1580
2360
3150
3930
4720
NC
-
-
-
-
20
26
30
34
33
41
39
48
Throw
33
28
54
49
65
58
74
68
83
78
92
84
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.
Home
>
Products
> BS
BS Download
Catalog
Submittal Sheet (
Inch
/
Metric
)
High Resolution Picture
Model BS damper with multiple blades is designed for air volume control for round ducts. Continuously adjustable from the face with a screwdriver for quick and easy volume control just by twisting until the desired setting is reached. The multiple blades provide more precise control. All-steel construction for durability.
Material
Heavy-Gauge Steel
Finish
Black
Sizes
6" 8" 10" 12" 14" 16" 20" 24"
*Note: Not for use with flexible ducts.
Model BS Dimensions
(PDF Version)
MODEL
DUCT SIZE
A
B
C
BS 6
6"
5 11/16
22/32
22/32
BS 8
8"
7 21/32
3/32
22/32
BS 10
10"
9 5/8
19/32
22/32
BS 12
12"
11 5/8
1 1/16
22/32
BS 14
14"
13 5/8
1 9/16
22/32
BS 16
16"
15 9/16
2 1/32
22/32
BS 20
20"
19 1/2
3 1/32
22/32
BS 24
24"
23 7/16
4 1/32
22/32
Dimensions are in inches. Product information is Subject to Change Without Notice