White Mountain Hearth DVX36FP32CLN-1 Installation Instructions And Owner's Manual page 33

VENTING FRAMING AND FINISHING (continued)
EXISTING CEILING JOISTS
CEILING BELOW
Vent Size
6 5/8"
8"
A
Vent Size
6 5/8"
8"
25047-0-0309
NEW FRAMING
A
B
A B
10" 10"
10 1/2" 10 1/2"
Figure 49
B
NAILS, 4 REQUIRED
CEILING FIRESTOP
A B
10" 10"
10 1/2" 10 1/2"
Figure 50
NAILS, 4 REQUIRED
Vent Size
6 5/8"
8"
See Horizontal Termination Page 34 and Vertical Termination
Pages 36 and 37.
CEILING FIRESTOP
A
B
A B
10" 10"
10 1/2" 10 1/2"
Figure 51
Page 33