AP PNEG-1608, Installation Manual

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2. Filter Duct Installation Instructions
8 PNEG-1608 Pathogen Barrier Filter Ducts
21-1/2" Wide Top Filter Ducts
1. Remove the existing insulation barrier.
2. The inside dimensions of the filter duct frame-out should be 75" x 19-1/2" for the 3 filter duct and
50" x 19-1/2" for the 2 filter duct (F).
NOTE: It is recommended to center the filter duct after the inlet.
3. Add 2" x 4" filler boards (E) against the inlet side of both lower truss cords (D), flush to the top (attic)
side. (See Figure 2B.)
Figure 2B
Ref # Description
A Caulk
B Existing Frame-Out
C Filter Duct Stringer 46-1/2" Long
D Truss
E 2" x 4" Filler
F
3 Filter (30-2403) = 75"
2 Filter (30-2402) = 50"
G 19-1/2" Inside
H Overlap caulk for a good seal.
I 24" On center trussing.