Top Vent Venting Runs - Montigo HW38DF Operation Manual

HW-Series Gas Fireplace
Page 8
Installation

Top Vent Venting Runs

For the HW38DF Top Vent, there are two types of installations: A)
Through-The-Wall Installations and B) Vertical (Through-The-Roof)
Installations.
A) Through-The-Wall Installations
Before you install any venting, you must determine whether the venting
run will be acceptable. Unacceptable venting can affect the fireplace's
combustion.
The Venting Graph
Measure the vertical height from the fireplace hearth to the centre of
the termination and the horizontal run from the from the fireplace flue
collar to the wall flange of the termination. Plot on the Venting Graph
(Fig. 9a) with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
42"
36
Figure 9b. HW38DF Top Vent Venting Graph
Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 84" and the horizontal run to
the wall flange of the vent termination is 36", this would be an acceptable
installation.
Example B: (Acceptable Installation)
If the vertical dimension from the hearth is 90" and the horizontal run to
the wall flange of the vent termination is 126", this would be an acceptable
installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fireplace is 74" and the
horizontal run to the wall flange of the vent termination is 108", this would
NOT be an acceptable installation.
NOTES:
(may use 4"/7" Top Vent ONLY)
C
A
Power Vent models, LDVPV47
EDVRSPV58, and EDVWSPV58
to be used within the shaded area of
24" NG 36" LP 60" NG
graph. (See Index of this guide for
applicable Product page).
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).
B
Part No. XG0190 - 071409