Vermont Casting 33XDV Manuel D’Utilisation

21

Max. Height 40’ (12.2m)
Min. Height 8’ (2.4m)

Max. 10’ (3m)

Support Straps 

Every 3’ (.9m)

Max. 
Height 40’ (12.2m)
Min. 
Height 8’ (2.4m)

Max. 10’ (3m)

FP1183

Fig. 41  Support straps for horizontal runs.

1
2
3
4

1
2
3
4

FP1179

Fig. 42   Maximum elbow usage.

1.  Locate your fireplace.
2.  Plumb to center of the (4”) flue collar from ceiling 

above and mark position.

3.  Cut opening equal to 9³⁄₈” x 9³⁄₈” (240 x 240 mm).
4.  Proceed to plumb for additional openings through 

the roof. In all cases, the opening must provide a 
minimum of 1 inch clearance to the vent pipe, i.e., 
the hole must be at least 9³⁄₈” x 9³⁄₈” (240 x 240 mm).

5.  Place fireplace into position.
6.  Place firestop(s) #7DVFS or Attic Insulation Shield 

#7DVAIS into position and secure. (Fig. 43)

7.  Install roof support (Fig. 44) and roof flashing making 

sure upper flange is below the shingles. (Fig. 46)

8.  Install appropriate pipe sections until the venting is 

above the flashing. (Fig. 46)

9.  Install storm collar and seal around the pipe.
10. Add additional vent lengths for proper height. (Fig. 

45)

11. Apply high temperature sealant to 4” and 7” collars 

of vertical vent termination and install.

If there is a room above ceiling level, fire stop spacer 
must be installed on both the bottom ad the top side 
of the ceiling joists. If an attic is above ceiling level a 
7DVAIS (Attic Insulation Shield) must be installed.
The enlarged ends of the vent section always face 
downward.

FP1029
attic insulation shield
firestop spacers
1/28/00   djt

Joist

11”

(279mm)

Firestop 
Spacer

Nails (4)

Fig. 43  Place firestop spacer(s) and secure.

FP1029

11”

(279mm)