Vermont Casting DVRT39, DVRT43, DVRT36 manual Vertical Through-the-RoofInstallation, 10002428

Vermont Castings, Majestic Products DVRT36/39/43

•Up to two (2) 45° elbows may be used within the horizontal run. For each 45° elbow used on the horizontal plane, the maximum horizontal length must be reduced by 18” (450mm).

Example: Maximum horizontal length

No elbows	=	10’ (3m)
1 x 45° elbows	=	8.5’ (2.6m)
2 x 45° elbows	=	7’ (2.1m)

•A minimum of an 8’ (2.5m) vertical rise is required.

•Two (2) sets of 45° elbows offsets may be used within the vertical sections. From 0 to a maximum of 8’ (2.5m) of vent pipe can be used between elbows. (Fig. 34)

•7DVCS supports offsets. (Fig. 34) This application requires you to first determine the roof pitch and use the appropriate starter kit. See Venting Components List.

•The maximum angular variation allowed in the system is 270°. (Fig. 34)

•Minimum height of the vent above the highest point of penetration through the roof is 2’ (610mm). (Fig. 37) See Note 2 on Page 12.

1 + 2 + 3 + 4 = 270°

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4

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FP1179

Fig. 34 Maximum elbow usage.

Vertical Through-the-Roof Installation

1.Locate your fireplace.

2.Plumb to center of the 4” flue collar from ceiling above and mark position.

3.Cut opening equal to 9¹⁄₂” x 9¹⁄₂” (240 x 240mm).

4.Proceed to plumb for additional openings through the roof. In all cases, the opening must provide a minimum of 1” (25mm) clearance to the vent pipe; i.e., the hole must be at least 9¹⁄₂” x 9 ¹⁄₂” (240 x 240mm).

5.Place fireplace into position.

6.Place firestop(s) #7DVFS or Attic Insulation Shield #7DVAIS into position and secure. (Fig. 35)

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7.Install roof support and roof flashing, making sure the upper flange is below the shingles. (Fig. 36)

8.Install appropriate pipe sections until the venting is above the flashing. (Fig. 38)

9.Install storm collar and seal around the pipe.

10.Add additional vent lengths for proper height. (Fig. 37)

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 and 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.

Attic
Insulation Shield
Upper Floor
	11"	11"
Ceiling	(279mm)
		(279mm)
Installation
Joist
		Firestop
		Spacer
	Nails (4)	FP1029
Fig. 35 Attic insulation shield and firestop spacer.
		Typical Ceiling
		Support
Typical Roof		Application
Support
Application
		FP1184
Fig. 36 Venting supports.
		10002428