Dimension Guide

Because Whirlpool Corporation includes a continuous commitment to improve our
products, we reserve the right to change materials and specifications without notice.
Dimensions are for planning purposes only. For complete details, see Installation
Instructions packed with product. Specifications subject to change without notice.
Ref. W11087690A
05/17/2017
Page 2 of 3
VENTING DESIGN SPECIFICATIONS
This section is intended for architectural designer
and builder/contractor reference only.
NOTES:
■ Vent materials needed for installation are not provided with microwave
hood combination.
■ We do not recommend using a flexible metal vent.
■ To avoid possible product damage, be sure to vent air outside, unless
using recirculation installation. Do not vent exhaust air into concealed
spaces, such as spaces within walls or ceilings, attics, crawl spaces
or garages.
For optimal venting installation, we recommend:
■ Using roof or wall caps that have back draft dampers.
■ Using a rigid metal vent.
■ Using the most direct route by minimizing the length of the vent and
number of elbows to provide efficient performance.
■ Using uniformly sized vents.
■ Using duct tape to seal all joints in the vent system.
■ Using caulking compound to seal exterior wall or roof opening around
cap.
■ Not installing 2 elbows together for optimal hood performance.
If venting through the wall, be sure that there is proper clearance within
the wall for the damper to open fully.
If venting through the roof, and rectangular to round transition is used,
be sure there is at least 3" (7.6 cm) of clearance between the top of the
microwave oven and the transition piece. See the “Rectangular to Round
Transition” illustration.
Rectangular to Round Transition:
NOTE: The minimum 3" (7.6 cm) clearance must exist between the top
of the microwave oven and the rectangular to round transition piece so
that the damper can open freely and fully.
Recommended Standard Fittings
The following length equivalents are for use when figuring vent length.
See the examples in the “Recommended Vent Length” section.
Roof venting Roof cap
Wall venting Wall cap
A
B
C
E
F
D
3" (7.6 cm)
A. Roof cap
B. 6" (15.2 cm) min. diameter round vent
C. Elbow (for wall venting only)
D. Wall cap
E. 3
1
⁄
4
" x 10" to 6" (8.3 cm x 25.4 cm to 15.2 cm)
rectangular to round transition piece
F. Vent extension piece, at least 3" (7.6 cm) high
A B C
D E F G
A. Rectangular to round transition piece: 3
1
/
4
" x 10" to 6" = 5 ft
(8.3 cm x 25.4 cm to 15.2 cm = 1.5 m)
B. Roof cap: 3
1
/
4
" x 10" = 24 ft (8.3 cm x 25.4 cm = 7.3 m)
C. 90° elbow: 3
1
/
4
" x 10" = 25 ft (8.3 cm x 25.4 cm = 7.6 m)
D. 90° elbow: 6" = 10 ft (15.2 cm = 3 m)
E. Wall cap: 3
1
/
4
" x 10" = 40 ft (8.3 cm x 25.4 cm = 12.2 m)
F. 45° elbow: 6" = 5 ft (15.2 cm = 1.5 m)
G. 90° flat elbow: 3
1
/
4
" x 10" = 10 ft (8.3 cm x 25.4 cm = 3 m)