XG0222
17
Installation
Roof mounted Terminations
The following details are some possible configurations for Roof mounted
terminations. See below.
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.
•
For a detailed diagram of allowed termination locations, see
Appendix A.
• Termination location must be a minimum 6’ from a mechanical air inlet.
•
A maximum of three 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.
Figure 9.
Top vent, Roof mounted termination with no offset in vent run.
Figure 9.b
Top vent, Roof mounted with 1 offset (1 offset= two 90° bends).
Figure 9.c
Top vent, Roof mounted with 2 offsets (1 offset= two 90° bends).
Section 3-2: Installing a Roof Mounted Direct Vent
Termination (PVTK1SS)
PVTK1 Termination
PVTK1 Termination
PVTK1 Termination
Storm collar
Storm collar
Storm collar
2' min
2' min
2' min
Support ring
Support ring
Support straps OR
Support ring and plates
Support ring and plates
Support plate
Support plate
Firestop
PEXT
PEXT-10
Adaptor
Flue
collar
Firestop
Firestop
Firestop
Obstacle
Obstacle
Firestop
32' max
32' max
32' max
Roof flashing
Roof flashing
Roof flashing
