Installing A Roof Mounted Direct Vent Termination; Venting Layout; Roof Mounted Terminations - Montigo H38DF-CLCR Installation & Maintenance Manual

H(L)38DF-CLCR Corner Gas Fireplace
INSTALLING A ROOF MOUNTED DIRECT VENT
TERMINATION
This section applies to installations where the direct vent termination will
be roof mounted.

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 11 to 11c *).
Termination location must be a minimum 6' from a mechanical air inlet.

Termination location must be a minimum 18" from a parapet wall.

A maximum of two offsets (each offset is made up of 2-90° bends) may

be made.
Install a firestop at any location where venting passes through combustible

materials and construction.
Utilize support straps, or support plates, and rings (as required) to meet

acceptable building practices.
Install all roof flashing and storm collars as shown.


Roof mounted Terminations

The following details are some possible configurations for Roof
mounted terminations. See below.
PVTK1
Termination
32' max.
Figure 11. Top vent, Roof mounted termination with no offset in vent run.
Page 8
Installation
32' max.
Figure 11a. Top vent, Roof mounted with 1 offset (1 offset= two 90° bends).
2' max
2' min.
Support ring
Support plate
Firestop
Figure 11b. Top vent, Roof mounted with 2 offsets (1 offset= two 90° bends).
PVTK1
Termination
Obstacle
PVTK1
Termination
2' min.
Obstacle
2' min.
Support ring
Support plate
Firestop
Support straps or
support plate & ring
Firestop
Support plate
& ring
Firestop
Firestop
XG0213 - 020111