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Wall Plenum Installation
B
Detail B
Step 3 - Inside Wall Plenum (cont.)
NOTE: Do not place any screws, fasteners, or penetrating holes through the top or bottom of the plenum
assembly.
1. Drill pilot holes on the interior of the inside plenum half (Part B) as show in Detail B. Pilot holes should be
located approximately 4” from the top and bottom of the inside plenum half, on both the left and right sides.
2. Install fasteners through each pilot hole. Fastener must pass through both Part A and Part B. If the inside and
outside plenum halves do not overlap at fastening point, be certain to drill extra holes where needed to secure
both Part A and Part B to the rough opening.
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