Whirlpool WMHA9019HZ Instructions D'utilisation page 14

Recommended Standard Fittings
The following length equivalents are for use when figuring vent
length. See the examples in "Recommended Vent Length"
section.
A
D E
A. Rectangular-to-round transition piece: 3
(8.3 x 25.4 cm to 15.2 cm = 1.5 m)
B. Roof cap: 3 ⁄ " x 10" = 24 ft (8.3 x 25.4 cm = 7.3 m)
1
4
C. 90° elbow: 3 ⁄ " x 10" = 25 ft (8.3 x 25.4 cm = 7.6 m)
1
4
D. 90° elbow: 6" = 10 ft (15.2 cm = 3 m)
E. Wall cap: 3 ⁄ " x 10" = 40 ft (8.3 x 25.4 cm = 12.2 m)
1
4
F. 45° elbow: 6" = 5 ft (15.2 cm = 1.5 m)
G. 90° flat elbow: 3 ⁄ " x 10" = 10 ft (8.3 x 25.4 cm = 3 m)
1
4
Recommended Vent Length
A 3 ⁄ " x 10" (8.3 x 25.4 cm) rectangular or 6" (15.2 cm) round
1
4
vent should be used.
The total length of the vent system including straight vent,
elbow(s), transitions and wall or roof caps must not exceed
the equivalent of 140 ft (42.7 m) for either type of vent. See the
"Recommended Standard Fittings" section for equivalent lengths.
For best performance, use no more than three 90° elbows.
To calculate the length of the system you need, add the
equivalent lengths of each vent piece used in the system.
See the following examples:
3 ⁄ " x 10" (8.3 x 25.4 cm) vent system = 73 ft (22.2 m)
1
4
total
A
2 ft
(0.6 m)
3 ⁄ "
1
A. One x 10" (8.3 x 25.4 cm) 90° elbow = 25 ft (7.6 m)
4
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)
14
B C
F G
⁄ " x 10" to 6" = 5 ft
1
4
B
6 ft (1.8 m)
C
6" (15.2 cm) vent system = 73 ft (22.2 m) total
A
2 ft
(0.6 m)
C
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)
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.
B
6 ft (1.8 m)
D