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Section 3-2: Installing a Roof Vent Termination
Section 3-2-1: Roof Venting termination
• 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).
• See Appendix A for termination locations.
• A maximum of two offsets (each offset is made up of 2-90° bends)
may be made for vertical vent runs.
MVTK1 / PVTK1
Termination
2' min
Storm collar
Roof flashing
Support straps
OR Support ring
and plates
Firestop
See venting
layout section
for max
distances
Figure 6.b Top vent, Roof mounted with 1
offset (1 offset= two 90° bends).
MVTK1 / PVTK1
Termination
2' min
Storm collar
Roof flashing
Support straps
OR Support ring
and plates
Firestop
See venting
layout section
for max
distances
Figure 6. Top vent, roof mounted termi-
nation with no offset in vent run.
24
• 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.
MEXT/
PEXT
MXT-10 /
PEXT-10
Adaptor
Flue
Collar
MVTK1 / PVTK1
Termination
2' min
Storm collar
Roof flashing
Support straps
OR Support ring
and plates
Firestop
Support ring
and plates
See venting
layout section
for max
distances
Figure 6.c Top vent, Roof mounted with 2
offsets (1 offset= two 90° bends).
Installation
DRL
DRL
DRL
DRL
36 48
60
72
XG0226 - 042220
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