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25
3
1
/
4
" x 10" (8.3 x 25.4 cm) vent system = 73 ft (22.2 m) total
A B
C
D
E
A. One 3
1
/
4
" x 10" (8.3 x 25.4 cm) 90° elbow= 25 ft (7.6 m)
B. 1 wall cap = 40 ft (12.2 m)
C. 2 ft (0.6 m) + 6 ft (1.8 m) straight = 8 ft (2.4 m)
D. 6 ft (1.8 m)
E. 2 ft (0.6 m)
6" (152 mm) vent system = 73 ft (22.2 m) total
A
B
C D
E
F
A. Two 90° elbows = 20 ft (6.1 m)
B. 1 wall cap = 40 ft (12.2 m)
C. 1 rectangular-to-round transition piece = 5 ft (1.5 m)
D. 2 ft (0.6 m) + 6 ft (1.8 m) straight = 8 ft (2.4 m)
E. 6 ft (1.8 m)
F. 2 ft (0.6 m)
If the existing vent is round, a rectangular to round transition piece
must be used. In addition, a rectangular 3" (7.6 cm) extension
vent between the damper assembly and rectangular to round
transition piece must be installed to keep the damper from
sticking.
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