Dimension Guide
Because Whirlpool Corporation includes a continuous commitment to improve our
products, we reserve the right to change materials and specications without notice.
Dimensions are for planning purposes only. For complete details, see Installation
Instructions packed with product. Specications subject to change without notice.
Ref. W10918334
06/01/2017
Page 3 of 3
Recommended Vent Length
A 3¹⁄₄" x 10" (8.3 x 25.4 cm) rectangular or 6” (15.2 cm) round 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:
3¹⁄₄" x 10" (8.3 x 25.4 cm) vent system = 73 ft (22.2 m) total
A B
C
6 ft (1.8 m)
2 ft
(0.6 m)
A. One 3¹⁄₄" 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)
6" (15.2 cm) vent system = 73 ft (22.2 m) total
A B
C D
6 ft (1.8 m)
2 ft
(0.6 m)
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.