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43
DUCTING DESIGN SPECIFICATIONS
This section is intended for architectural designer and builder/contractor
reference only.
NOTES:
• Duct materials needed for installation are not provided with microwave
oven.
• We do not recommend using a flexible metal Duct.
• 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.
• The supplied exhaust adapter is designed to work with a standard
1
/
4
" x
10" (8.3 x 25.4 cm) rectangular duct. If the existing duct is round, a
rectangular-to-round transition piece must be used.
• If venting through the roof, and rectangular-to-round transition is used,
be sure there are at least 3" (7.6 cm) of clearance between the top of the
microwave oven and the transition piece so that the damper can open
freely and fully.
• If venting through the wall, be sure that there is proper clearance within
the wall for the damper to open fully.
• For rear wall venting, care should be taken to align exhaust with space
between studs, or wall should be prepared at the time it is constructed by
leaving enough space between the wall studs to accommodate exhaust.
For optimal venting installation, we recommend:
• Using roof or wall caps that have back draft dampers
• Using a rigid metal duct
• Using the most direct route by minimizing the length of the vent and
number of elbows to provide efficient performance
• Using uniformly sized ducts
• 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
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