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
"Rectangular-to-Round Transition" illustration.
Roof venting
Wall venting
14
VENTING DESIGN SPECIFICATIONS
Roof cap
Wall cap
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.
A
B
C
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
⁄
" x 10" to 6" (8.3 x 25.4 cm to 15.2 cm)
1
4
rectangular-to-round transition piece
F. Vent extension piece, at least 3" (7.6 cm) high
Recommended Standard Fittings
The following length equivalents are for use when figuring vent
length. See the examples in "Recommended Vent Length."
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
1
⁄
" x 10" = 25 ft (8.3 x 25.4 cm = 7.6 m)
4
D. 90° elbow: 6" = 10 ft (15.2 cm = 3 m)
E. Wall cap: 3
1
⁄
" x 10" = 40 ft (8.3 x 25.4 cm = 12.2 m)
4
F. 45° elbow: 6" = 5 ft (15.2 cm = 1.5 m)
G. 90° flat elbow: 3
1
⁄
" x 10" = 10 ft (8.3 x 25.4 cm = 3 m)
4
D
E
F
B
C
F
G
⁄
" x 10" to 6" = 5 ft
1
4