Section 3-2: Installing A Roof Mounted Direct Vent; Termination (Pvtk-1); Section 3-2-1: Venting Layout; Roof Mounted Terminations - Montigo H38DF PRC Installation & Maintenance Manual

H*38DF PRC Panorama Indoor Gas Fireplace
Section 3-2:
INSTALLING A ROOF MOUNTED DIRECT VENT

TERMINATION (PVTK-1)

This section applies to installations where the direct vent termi-
nation 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' min.
Support ring
Support plate
Firestop
Support straps or
support plate & ring
Firestop
Support plate
& ring
Firestop
Firestop
XG0211 - 151126