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Calculating Vent System Length
To calculate the length of the system you need, add the
equivalent feet (meters) for each vent piece used in the system.
6" (15.2 cm) Vent System
Vent Piece 6" (15.2 cm) Round
45° elbow 2.5 ft
(o.8m)
90° elbow 5.0 ft
(1.5 m)
3W' x 10" (8.3 cm x 25.4 cm) Vent System
Vent Piece 31/4'' x 10" (8.3 cm x 25.4 cm)
31/4"x 10" (8.3 cm x 25.4 cm) 5.0 ft
90° elbow (1.5 m)
31/4"x 10" (8.3 cm x 25.4 cm) 12.0 ft
flat elbow (3.7 m)
31/4"x 1O" (8.3 cm x 25.4 cm) O.Oft
wall cap (0.0 m)
6" (15.2 cm) 0.0 ft
wall cap (0.0 m)
31/4'' x 10" (8.3 cm x 25.4 cm) 4.5 ft
to 6" (15.2 cm) (1.4 m)
31/4"x 10" (8.3 cm x 25.4 cm) 5.Oft
to 6" (15.2 cm) 90 ° elbow (1.5 m)
Example vent system
90 ° e_bows
31/4"×10"
(8=3 × 25.4 cm) _
to 6" (15.2 cm}
transition L_ _
2 ft (0.6 m)
Maximum Recommended Length = 26 ft (7.9 m)
1 - transition
2 - 90° elbows
1 - wall cap
8 ft (2.4 m) straight
Length of 6" (15.2 cm) system
= 4.5 ft (1.4 m)
= 10.0 ft (3.0 m)
= 0.0 ft (0.0 m)
= 8.0 ft (2.4 m)
= 22.5 ft (6.9 m)
Example vent system
3%" ×10"
(8=3 × 25=4 cm)
e_bow
6 ft (1.8 m) ------€_ I Wall cap
I
Maximum Recommended Length = 26 ft (7.9 m)
1 - 90 ° elbow
8 ft (2.4 m) straight
1 - wall cap
Length of 31/4'' x 10" (8.3 cm x 25.4 cm)
system
= 5.0 ft (1.5 m)
= 8.0 ft (2.4 m)
= 0.0 ft (0.0 m)
= 13.0 ft (3.9 m)
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