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Flat Roof Installations RB1200
Flat Roof Installations RB900
2 x 4 framing
recommended
discharge side of
blower
7”
11”
diameter hole
2”
23 1/4”
17 3/4”
11”
diameter hole
7”
2 x 4 framing
recommended
33 1/4”
discharge side of
blower
26 3/4”
2”
FIGURE 5
FIGURE 6
Flat roof installations