DVB Series Direct Vent Gas Fireplace
18
54D0701
VeNtING INstAllAtIoN
NOTE: Horizontal sections of this vent system require
a minimum of 3" clearances to combustibles at the top
of the flue and 1" clearance at the sides and bottom
until the flue penetrates the outside wall. A minimum
1" clearance all around the flue is acceptable at this
point of penetration.
Vertical sections of this vent system require a minimum
of 1" clearance to combustibles on all sides of the
pipe.
When vent exits through foundations less than 0" below
outcrop, the termination must be flush up with outcropped
wall above.
It is best to locate the fireplace in such a way that minimizes
the number of offsets and horizontal vent length.
The horizontal vent run refers to the total length of vent
pipe from the flue collar of the fireplace (or the top of the
Transition Elbow) to the face of the outer wall.
•
The maximum number of 90° elbows per side wall
installation is three (3).
Figure 21
•
If a 90° elbow is fitted directly on top of the fireplace
flange the maximum horizontal vent run before the ter-
mination or a vertical rise is 36” (914 mm).
Figure 22
•
If a 90° elbow is used in the horizontal vent run (level
height maintained) the horizontal vent length is reduced
by 36".
Figures 21 and 22.
This does not apply if the
90° elbows are used to increase or redirect a vertical
rise.
Figure 24
W
ARNING
When installing the appliance as a rear
vent unit, the 90° or 45° transition elbow
attached directly to the rear of the unit is
Not INcluDeD in the following criteria
and calculations and, unless specifically
mentioned, should be ignored when
calculating venting layouts.
FP1176
max 90 bends
3 x 90°
Elbows
Figure 21 -
Maximum Three (3) 90° Elbows per Installation
3 x 90°
Elbows
FP1176
Max 20"
Max 20"
36"
(914 mm)
Max.
36"
(914 mm)
Max.
FP1177
max horizontal run
FP1177
Figure 22 -
Maximum Horizontal Run with No Rise
Example: According to the vent graph (Page 20) the maxi-
mum horizontal vent length in a system with a 7.5' vertical
rise is 20’ (6 m) and if a 90° elbow is required in the hori-
zontal vent it must be reduced to 17' (5.2 m).
In Figures 23 and 24,
Dimension A plus B must not be
greater than 17' (5. m).
•
The maximum number of 45° elbows permitted per side
wall installation is two (). These elbows can be installed
in either the vertical or horizontal run.
•
For each 45° elbow installed in the horizontal run, the
length of the horizontal run MUST be reduced by 18" (45
cm). This does not apply if the 45° elbows are installed
on the vertical part of the vent system.
•
The maximum number of elbow degrees in a system is
70°.
Figure 25
90°
7'6"
A
B
FP2098
Horiz run reduce
FP098
Figure 23 -
Horizontal Run Reduction
