Vermont Casting 36CDVTRN Manuale Utente

19

  Example: Maximum horizontal length
  0 x 45° elbows  =  10’ (3 m)
  1 x 45° elbows  =  8¹⁄₂’ (2.6 m)
  2 x 45° elbows  =  7’ (2.1 m)
3.  A minimum of an 8’ vertical rise.
4.  Two sets of 45° elbows offsets within these vertical 

installations. From 0 to a maximum of 8’ (2.4 m) of 
vent pipe can be used between elbows. (Fig. 33)

5.  7DVCS must be used to support offsets. (Fig. 33) 

This application will require that you first determine 
the roof pitch and use the appropriate 7DVSKV (A, B 
or F). (Refer to Venting Components List, Page 27)

FP1021

Typical vertical 

through the roof

application

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Max. 

8’ 

(2.4 m)

45°

Max. 

8’ 

(2.4 m)

45°

50’

(15 m)

FP1021

Fig. 33  Typical vertical roof applications.

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. 34)

CFM100 

Firestop-Vertical

09/20/00

11"

11"

Joist

Joist

Firestop Spacer

Nails (4)

CFM100

Fig. 34  Place firestop spacer(s) and secure.

7.  Install roof support (Fig. 35 & 36) and roof flashing 

making sure upper flange is below the shingles. (Fig. 
35)

8.  Install appropriate pipe sections until the venting is 

above the flashing. (Fig. 35)

TWL101a

Twist Lock Pipe

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3 #5 Sheet Metal 

Screws per Joint 

Storm Collar

TWL101a

Fig. 35  Roof flashing.

Sealant