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483464 • GRSI and GRSR, Rev. 1,  January 2019 

Copyright 2019 © Greenheck Fan Corporation

2

As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications 
without notice.

Product warranties can be found online at Greenheck.com, either on the specific product page or in the literature 
section of the website at Greenheck.com/Resources/Library/Literature.

®

Phone: 715.359.6171 • Fax: 715.355.2399 • Parts : 800.355.5354 • E-mail: [email protected] • Website: www.greenheck.com

Our Commitment

Unit  
Size

 

A

B

C

D

E

F

Damper 

Size

8

19 

(483)

20

1

2

 

(521)

7

1

4

 

(184)

1

1

2

 

(38)

20

1

4

 

(514)

8

1

(210)

8 x 8 

(203 x 203)

10

19 

(483)

20

1

2

 

(521)

7

3

4

 

(197)

(51)

20

1

4

 

(514)

10

1

4

 

(260)

10 x 10 

(254 x 254)

12

22 

(559)

29 

(737)

10 

(254)

3

1

2

 

(89)

23

1

4

 

(591)

12

1

4

 

(311)

12 x 12 

(305 x 305)

15

22 

(559)

29 

(737)

10 

(254)

3

1

2

 

(89)

23

1

4

 

(591)

14

1

4

 

(362)

16 x 16 

(406 x 406)

16

26 

(660)

29 

(737)

11 

(279)

4

1

4

 

(108)

27

1

(692)

16

1

4

 

(413)

16 x 16 

(406 x 406)

18

30 

(762)

35

1

2

 

(902)

9

3

4

 

(248)

1

3

4

 

(44)

31

1

4

 

(794)

20

1

4

 

(514)

18 x 18 

(457 x 457)

20

30 

(762)

35

1

2

 

(902)

11

1

4

 

(286)

3

3

4

 

(95)

31

1

4

 

(794)

20

1

4

 

(514)

18 x 18 

(457 x 457)

24

34 

(864)

38

1

(972)

11 

(279)

(102)

35

1

4

 

(895)

24

1

2

 

(622)

24 x 24 

(610 x 610)

30

40 

(1016)

48 

(1219)

18

3

4

 

(476)

5

7

16

 

(138)

-

30

1

2

 

(775)

30 x 30 

(762 x 762)

36

46 

(1168)

56

3

4

 

(1441)

21

1

4

 

(540)

(152)

-

36

1

2

 

(927)

36 x 36 

(914 x 914)

42

52 

(1321)

63

1

4

 

(1607)

24

1

4

 

(616)

6

1

4

 

(159)

-

42

1

(1089)

42 x 42 

(1067 x 1067)

48

58 

(1473)

72 

(1829)

26

1

4

 

(667)

6

1

2

 

(165)

-

48

1

2

 

(1232)

48 x 48 

(1219 x 1219)

All dimensions in inches 

(millimeters)

 and the weight in pounds (kilograms).

NOTE: Sizes GRS-8 through 24 have a one-piece cover and shroud. Access is gained 
through the removal of screws. Sizes GRS-30 through 48 have a removable cover, 
separate from the shroud to facilitate maintenance and servicing of dampers.

Dimensional Data

Parts List

GRSI/GRSR - Sizes 30 - 48

F

(44)

D

A

C

B

GRSF - Sizes 8 - 24

with Optional Flashing Flange

F

D

E

C

B

GRSI/GRSR Sizes 8 - 24

B

F

(44)

D

A

C

Hood

Birdscreen

Optional Flashing Flange

Birdscreen
Support Bracket (4)

Hood

Windband

Curb Cap

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