Size

A

B

C

D

8"

Gravity Vent Top

33.13

28.93

24.21

24.21

10"

Gravity Vent Top

37.77

32.96

27.61

27.61

12"

Gravity Vent Top

42.29

36.93

30.91

30.91

14"

Gravity Vent Top

47.16

41.18

34.49

34.49

16"

Gravity Vent Top

52.00

45.41

38.02

38.02

18"

Gravity Vent Top

57.41

50.11

41.96

41.96

20"

Gravity Vent Top

63.34

55.29

46.29

46.29

22"

Gravity Vent Top

82.50

72.07

60.33

60.33

24"

Gravity Vent Top

90.65

79.13

66.27

66.27

26"

Gravity Vent Top

103.97

90.77

76.02

76.02

28"

Gravity Vent Top

123.87

108.13

90.56

90.56

30"

Gravity Vent Top

149.02

130.12

108.92

108.92

8"

Gravity Vent Base

32.46

28.34

23.70

23.70

10"

Gravity Vent Base

35.43

30.94

25.90

25.90

12"

Gravity Vent Base

37.26

32.51

27.22

27.22

14"

Gravity Vent Base

38.82

33.89

28.37

28.37

16"

Gravity Vent Base

40.56

35.41

29.61

29.61

18"

Gravity Vent Base

42.19

36.88

30.87

30.87

20"

Gravity Vent Base

46.87

40.93

34.27

34.27

22"

Gravity Vent Base

55.15

48.16

40.33

40.33

24"

Gravity Vent Base

63.47

55.42

46.39

46.39

26"

Gravity Vent Base

76.76

67.03

56.11

56.11

28"

Gravity Vent Base

96.65

84.38

70.66

70.66

30"

Gravity Vent Base

119.80

104.62

87.57

87.57

8"

Gravity Vent Damper w/Chain

12.26

10.71

8.96

8.96

10"

Gravity Vent Damper w/Chain

13.56

11.86

9.91

9.91

12"

Gravity Vent Damper w/Chain

14.93

13.02

10.89

10.89

14"

Gravity Vent Damper w/Chain

16.28

14.24

11.91

11.91

16"

Gravity Vent Damper w/Chain

17.54

15.30

12.81

12.81

18"

Gravity Vent Damper w/Chain

18.80

16.41

13.73

13.73

20"

Gravity Vent Damper w/Chain

20.23

17.65

14.80

14.80

22"

Gravity Vent Damper w/Chain

21.80

19.02

15.93

15.93

24"

Gravity Vent Damper w/Chain

23.52

20.52

17.18

17.18

26"

Gravity Vent Damper w/Chain

25.84

22.56

18.88

18.88

28"

Gravity Vent Damper w/Chain

28.47

24.86

20.83

20.83

30"

Gravity Vent Damper w/Chain

32.13

28.05

23.51

23.51