Montigo H38PFNI-2 Installation And Maintenance Manual page 19

Corner Top Venting Graph
Measure the vertical height from the fireplace hearth to the centre of
the termination and the horizontal run from the fireplace flue collar to
the wall flange of the termination. Plot on the Venting Graph with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
Selection of components and details of venting layout should adhere
to the following guidelines:
• Vent terminations must not be recessed in walls or siding.
• For Heat Shield requirements see Section 3-3.
• Once the proposed venting layout has been determined refer to
graph to ensure the layout is acceptable.
Notes Wall Mounted Terminations: TOP VENT
• All measurements for vertical or horizontal runs are measured from
center of the vent pipe.
• Venting runs must fall within the limits set by the venting graph.
Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 126" and the horizontal
run to the wall flange of the vent termination is 138", this would be an
acceptable installation.
Example B: (Unacceptable Installation)
If the vertical dimension from the hearth is 36" and the horizontal run
to the wall flange of the vent termination is 84", this would not be an
acceptable installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fireplace is 60" and the
horizontal run to the wall flange of the vent termination is 144", this
would not be an acceptable installation.
TOP VENT RUN
132
120
Acceptable vent run
within non-shaded area.
108
96
84
72
60
48
46''
36
24
18''
12
0
0 12 24 36 48 60
Figure 8.b Top Vent Venting Graph for wall mounted terminations
XG0229 - 112718
A
C
B
Unacceptable vent run
within shaded area.
72 84 96 108 120 132 144 156 168 180
Horizontal Run (In.)
Hearth
Figure 8. Top Vented, wall mounted installation with 1 elbow (1 one 90° bend). The vent run
must comply with Venting Graph for Top vent, wall mounted terminations
Figure 8. Top Vented, wall mounted Multi-elbow installation. See Venting Graph for Top vent,
wall mounted terminations
30" Max.
126" Max.
Figure 8. Top Vented, wall mounted Retracted Multi-elbow installation
Installation
Heat Shield
18''
Max.
Termination
Exterior
Wall
150"
Heat Shield
Max.
Termination
Rigid
Section
Flex
Section
Exterior
Wall
Heat Shield
Termination
Rigid
Section
Flex 98''
Section Min.
Exterior
Wall
46''
Min.
96''
Min.
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