Section 3-2: Installing A Roof Mounted Direct Vent Termination (Mvtk-1); Section 3-2-1: Venting Layout: Roof Mounted Termination; Roof Mounted Terminations; Mvtk - Montigo H34DF Installation & Maintenance Manual

Section 3-2: Installing a Roof Mounted Direct Vent
Termination (MVTK-1)
This section applies to installations where the direct vent termination
will be roof mounted.

Section 3-2-1: Venting Layout: Roof Mounted Termination

Selection of components and details of venting lay out should
adhere to the following guidelines:
The maximum termination point is 32' above the fireplace (NOTE:
„
if the maximum termination height is used, the flame pattern
may be affected).
The Vertical termination must be a minimum 2' higher than where
„
the termination exits the roofing materials, (asphalt shingles,
cedar shakes, etc). This distance should be measured from the
high side of the roof slope where the flue flashing intersects the
roofing materials. (see Figures 11 to 11c).
Termination location must be a minimum 6' from a mechanical
„
air inlet.
For a more detailed diagram of allowed termination locations,
„
see Appendix A.
A maximum of two offsets (each offset is made up of 2-90°
„
bends) may be made for vertical vent runs.
Firestops must be installed as required by National & local codes.
„
Ensure all horizontal runs are supported with a minimum of 3
„
supports per 10' of venting.
Install all roof flashing and storm collars as shown.
„

Roof mounted Terminations

The following details are some possible configurations for Roof
mounted terminations.

MVTK1

PVTK1
Termination
Termination
32' max.
Figure 11. Top vent, Roof mounted termination with no offset in vent run.
XG0146 - 150204
Installation
32' max.
Figure 11a. Top vent, Roof mounted with 1 offset (1 offset= two 90° bends).
32' max
2' min.
Support ring
Support plate
Firestop
Figure 11b. Top vent, Roof mounted with 2 offsets (1 offset= two 90° bends).
H*34DF Indoor Gas Fireplace
MVTK1
PVTK1
Termination
Termination
Obstacle
MVTK1
PVTK1
Termination
Termination
2' min.
Obstacle
2'
2' min.
Support ring
Support plate
Firestop
Support straps or
support plate & ring
Firestop
Support plate
& ring
Firestop
Firestop
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