8
Calculating Vent System Length
IMPORTANT:
This range is rated at 60 ft (18.3 m) of 6"
(15.2 cm) or 30 ft (9.15 m) of 5" (12.7 cm) straight duct.
To calculate the length of the system you need, add the
equivalent feet (meters) for each vent piece used in the system.
5" (12,7 cm) and 6" (15.2 cm) Vent System
Vent Piece
Straight round
45° elbow
2.5 ft
(0.8 m)
90° elbow
5.0 ft
(1.5 m)
6" (15.2 cm) wall cap
0.0 ft
(0.0 m)
3
1
/
4
" x 10" (8.3 cm x 25.4 cm)
to 6" (15.2 cm) transition
4.5 ft
(1.4 m)
6" (15.2 cm) to 3
1
/
4
" x 10"
(8.3 cm x 25.4 cm) transition
1 ft
(0.3 m)
3
1
/
4
" x 10" (8.3 cm x 25.4 cm)
to 6" (15.2 cm) 90° elbow
transition
5.0 ft
(1.5 m)
6" (15.2 cm) to 3
1
/
4
" x 10"
(8.3 cm x 25.4 cm) 90° elbow
transition
5.0 ft
(1.5 m)
3
1
/
4
" x 10" (8.3 cm x 25.4 cm) Vent System
Vent Piece
3
1
/
4
" x 10" (8.3 cm x 25.4 cm)
90° elbow
5.0 ft
(1.5 m)
3
1
/
4
" x 10" (8.3 cm x 25.4 cm)
flat elbow
12.0 ft
(3.7 m)
3
1
/
4
" x 10" (8.3 cm x 25.4 cm)
wall cap
0.0 ft
(0.0 m)
Straight 3
1
/
4
" x 10"
(8.3 cm x 25.4 cm)
5" (12.7 cm) thermal break
Part Number 708786A
6" (15.2 cm) thermal break
Part Number 715557A
2.0 ft
(0.6 m)
Example 6" (15.2 cm) vent system
Venting between floor joists
Maximum length
= 60 ft (18.3 m)
1- 90° elbow
= 5 ft (1.5 m)
8 ft (2.4 m) straight
= 8 ft (2.4 m)
1 - wall cap
= 0 ft (0 m)
System length
= 13 ft (3.9 m)
NOTE:
For external venting, a flexible vent is not
recommended. Flexible vents create back pressure and air
turbulence that greatly reduce performance.
6ft (1.8 m)
2ft
(0.6 m)
90° elbow
Wall cap
Summary of Contents for W11024189A
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