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821 — Steel Register Vertical Fins, MS damper

How to Specify

Use the engineering data files to determine the proper size to use for maximum performance. Refer to the submittal drawing for key product dimensions.

How to Purchase

FAQs for GRDs

821 — Steel Register Vertical Fins, MS damper

Assets/Details

Submittal Data (58 KB, PDF)
Engineering Data (435 KB, PDF)
  • All-steel construction
  • Vertical, adjustable face bars
  • Horizontal multi-shutter valve
  • Bright White finish

821 - Steel Register Vertical Fins, MS damper - dimensional drawing

Available Sizes (inches)

Height
Width68101214161820243036
4
5
6
8
10
12
14
16
18
20
24

Contact factory for sizes not listed.

Product Performance Measurements*

All Sizes
8 x 4
10 x 4
12 x 4
14 x 4
12 x 5
10 x 6
14 x 5
12 x 6
16 x 5
14 x 6
16 x 6
20 x 5
24 x 5
20 x 6
24 x 6
20 x 8
30 x 6
24 x 8
30 x 8
24 x 10
36 x 8
24 x 12
30 x 10
36 x 10
30 x 12
36 x 12

Terminal Velocity

75 FPM

Size Face Velocity 300 400 500 600 700 800 900 1000
W x H "AK"
8 x 40.16CFM06580100110130145160
Throw06.581011131516
10 x 40.202CFM080100120140160180200
Throw0791113141618
12 x 40.244CFM0100120145170195220245
Throw08101214161820
14 x 40.286CFM0115145170200230255285
Throw08.5111315171922
12 x 50.312CFM0125155190220250280310
Throw09111416182022
10 x 60.314CFM0125155190220250285315
Throw09111416182123
14 x 50.366CFM0145185220255295330365
Throw010121517202224
12 x 60.379CFM0150190225265305340380
Throw010121517202225
16 x 50.419CFM0170210250295335380420
Throw011131618212426
14 x 60.444CFM0180220265310355400445
Throw011131619222427
16 x 60.51CFM0205255305355410460510
Throw012151720232629
20 x 50.526CFM0210265315370420475525
Throw012151821232729
24 x 50.634CFM0255315380445505570635
Throw013161923262932
20 x 60.64CFM0255320385445510575640
Throw013161923262932
24 x 60.771CFM0310385465540615695770
Throw014182125283235
20 x 80.868CFM0345435520610695780870
Throw015192326303438
30 x 60.967CFM0385485580675775870965
Throw016202428323640
24 x 81.045CFM04205256257308359401045
Throw017212529333741
30 x 81.31CFM0525655785915105011801310
Throw019232832374246
24 x 101.319CFM0530660790925105511851320
Throw019232833374246
36 x 81.576CFM06307909451105126014201575
Throw020253036414651
24 x 121.593CFM06357959951115127514351595
Throw020253136414751
30 x 101.654CFM06608259901160132514901655
Throw021263137424752
36 x 101.989CFM079599511951390159017901990
Throw023293440465157
30 x 121.997CFM0800100012001400160018002000
Throw023293440455157
36 x 122.402CFM0960120014401680192021602400
Throw025313844505663