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MD34-DV-2 Homefire
Top Vent Venting Runs
For the MD34-DV-2, 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. 7) with
an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
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
f i r e - p a r t s . c o m
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 fire-
place is 78" and the horizontal run to the wall flange
of the vent termination is 108", this would NOT be
an acceptable installation.
108
96
84
72
60
48
36
24
12
0
0
12 24 36 48 60 72 84 96 108
Hearth
Horizontal Run (in.)
Figure 7. MD34-DV-2 Top Vent Venting Graph
Page 6
Installation
Heat Shields
Due to high flue temperatures, heat shields
are required on all 34 Series Modular
Direct Vent installations (except those with
vertical terminations) at the point where the
venting connects to the termination. With
the heat shield, vent clearances can be
maintained at 1".
Figure 8.
Available Top Vent Components
The following venting components are available for the MD34-DV-2
Top Vent:
NOTES:
120
132
144 156 168 180
Top Vent
Heat Shield. Install by sliding over the vent pipe where it
passes through combustible construction.
A - Termination
B - Stucco Kits
D - Flex sections
E - Solid sections
F - Elbows
All dimension lengths 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 (see Figure 7).
MTO-3 (3" length)
MTO-3F (3" length)
MSR (stucco frame)
MOSR (stucco can)
BSR (brick can)
MFL-1 (12" section)
MFL-18 (18" section)
MFL-2 (24" section)
MFL-3 (36" section)
MFL-4 (48" section)
EXT-18 (18" f/f section)
MEXT-1 (12" m/f section)
MEXT-2 (24" m/f section)
MEXT-3 (36" m/f section)
MEXT-4 (48" m/f section)
MEL-90M (m/m 90° elbow)
MEL-90F (f/f 90° elbow)
MEL-90FM (f/m 90° elbow)
EEL-45 (f/m 45° elbow)
Part No. XG0106B
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