Section 3-2: Installing A Roof Mounted Direct Vent Termination (Pvtk-1); Section 3-2-1: Venting Layout; Roof Mounted Terminations - Montigo HW38DF Installation & Maintenance Manual

H*38DF Gas Fireplace
Section 3-2: Installing A Roof Mounted Direct Vent Termination
(PVTK-1)
This section applies to installations where the direct vent termination
will be roof mounted.

Section 3-2-1: Venting Layout

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 9 to 9c).
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.
PVTK1
Termination
32' max.
Figure 9.. Top vent, Roof mounted termination with no offset in vent run.
Page 10
Installation
32' max.
Figure 9a. Top vent, Roof mounted with 1 offset (1 offset= two 90° bends).
32' max
2' min.
Support ring
Support plate
Firestop
Figure 9b. Top vent, Roof mounted with 2 offsets (1 offset= two 90° bends).
PVTK1
Termination
Obstacle
PVTK1
Termination
2' min.
Obstacle
2'
2' min.
Support ring
Support plate
Firestop
Support straps or
support plate & ring
Firestop
Support plate
& ring
Firestop
Firestop
XG0147 - 150204