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Section 3-2: Installing a Roof Mounted Direct Vent
Termination (PVTK-1) for 5"/8"
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
8 to 8c).
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
8' min.
32' max.
PEXT
PXT-10
Adaptor
Flue
Collar
Figure 8. (5"/8") Top vent, Roof mounted termination
with no offset in vent run.
XG0218 - 160215
Installation
8' min.
32' max.
Figure 8a. (5"/8") Top vent, Roof mounted with 1 offset
(1 offset= two 90° bends).
8' min.
32' max
2' min.
Support ring
Support plate
Firestop
Figure 8b. (5"/8") Top vent, Roof mounted with 2 offsets
(1 offset= two 90° bends).
PL52DF* Indoor Gas Fireplace
PVTK1
Termination
Obstacle
PVTK1
Termination
2' min.
Obstacle
2' min.
Support ring
Support plate
Firestop
Support straps or
support plate & rin
Firestop
Support plate
& ring
Firestop
Firestop
Page 11
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