Top Vent Venting Runs - Montigo L38DF-ST Installation, Operation & Maintenance Manual

f i r e f e a t u r e

Top Vent Venting Runs

Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 108" and the horizontal
run to the wall flange of the vent termination is 180", this would be
an acceptable installation.
Example B: (Acceptable Installation)
If the vertical dimension from the hearth is 48" and the horizontal
run to the wall flange of the vent termination is 72", this would 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.
B
39 1/2"
42" NG & LP
Figure 7. L38DF -ST Top Vent Venting Graph
NOTES:
All dimension lengths for vertical or horizontal runs are
measured from centre of the vent pipe.
Venting runs must fall within the limits set by the venting
graph (see Figure 7).
Figure 8. Retracted Installation using a combination of solid and flex
venting. Use the vent graph to determine your allowable
run, then select appropriate components.
Part No. XG0810 - 092109
Installation
A
C
Power Vent models, LDVPV47
EDVRSPV58, and EDVWSPV58
to be used within the shaded area of
graph. (See Index of this guide for
applicable Product page).
RHS8
L38DF-ST See-thru Indoor Gas Fireplace
1 MIN
1 MIN
Figure 8a. RHS8 Installation. (Install by sliding over vent pipe where it
passes through the combustible construction.
RHS101 Heat Shield,
Outer Section.
Termination
Figure 8b. RHS101 Installation. (Install by sliding over vent pipe where
it passes through the combustible construction.
Figure 9. Horizontal flex installation with MIN vertical rise.
B. Vertical (Through-The-Roof) Installations
 Vertical rise >12' can be reduced (on applicable models).
Vertical Terminations must be installed:

• minimum 2' (two feet) above the highest point where
vent passes through the roof.
• minimum 6' (six feet) from a mechanical air inlet
• minimum 18" (1 1/2 feet) from a parapet wall.
1 MIN. Both
sides Typical
RHS8 Heat
Shield
Drywall
RHS101 Heat Shield,
Inner Section.
Vent from fireplace
Framing
36" max.
RHS8
42" min.
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