Section 3-2: Installing A Roof Mounted Direct Vent Termination; Section 3-2-1: Venting Layout - Montigo HL34 Installation & Maintenance Manual

Section 3-2: Installing a Roof Mounted Direct Vent
Termination
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).
• See Appendix A for termination locations.
• 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.
12
Roof mounted terminations
The following details are some possible configurations for roof mounted
terminations. See below.
PVTK1
Termination
2' min
Storm collar
Roof flashing
Support straps
OR Support ring
and plates
Firestop
32' Max.
Figure 6.b Top vent, Roof mounted with 1
offset (1 offset= two 90° bends).
PVTK1
Termination
2' min
Storm collar
Roof flashing
Support straps
OR Support ring
and plates
Firestop
32' Max.
Figure 6. Top vent, roof mounted termi-
nation with no offset in vent run.
PEXT
PEXT-10
Adaptor
Flue
Collar
Installation
PVTK1
Termination
2' min
Storm collar
Roof flashing
Support straps
OR Support ring
and plates
Firestop
Support ring
and plates
32' Max.
Figure 6.c Top vent, Roof mounted with 2
offsets (1 offset= two 90° bends).
PVTK1
Termination
2' min
Storm collar
Roof flashing
Support straps
OR Support ring
and plates
Firestop
32' Max.
Figure 6.d Side vent, Roof mounted vent-
ing (1 = 90° bend).
XG0228 - 021419