Vertical/Horizontal Termination Confi Gurations - Vermont Castings KSTDV500(N/P)TSCSB Installation And Operating Instructions Manual

For models purchased after 4/16/15, please see addendum.
KSTDV Series Gas Fireplace
VERTICAL/HORIZONTAL TERMINATION
CONFIGURATIONS
Since it is very important that the venting system
maintain its balance between the combustion air intake
and the fl ue gas exhaust, certain limitations as to vent
confi gurations apply and must be strictly adhered to.
The Vent Graph, showing the relationship between vertical
and horizontal side wall venting, will help to determine the
various dimensions allowable. Figure 10
NOTE: Horizontal sections of this vent system require
a minimum of 3" clearances to combustibles at the top
of the fl ue and 1" clearance at the sides and bottom
until the fl ue penetrates the outside wall. A minimum
1" clearance all around the fl ue is acceptable at this
point of penetration. Unless the vertical run is 7
or higher from fl oor of fi replace, the clearance for the
horizontal run is 1" on all sides.
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 20" below
outcrop, the termination must be fl ush up with outcropped
wall above.
It is best to locate the fi replace 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 fl ue collar of the fi replace (or the top of the
Transition Elbow) to the face of the fi nished outside wall.
•
The maximum number of 90° elbows per side wall
installation is three (3). Figure 14
3 x 90° Elbows
24" Min.
Figure 14 -
Maximum Three (3) 90° Elbows Per Installation
•
A minimum of 24" is required before a 90° elbow. If a 90°
elbow is fi tted directly after 24" vertical section mounted
to the top of the fi replace, the horizontal vent run before
the termination must be 36" (914 mm). Figure 15
16
24"
(610 mm)
Min.
Figure 15 -
Horizontal Run with Minimum Vertical Rise
⁄
1
feet
2
•
Example: According to the vent graph (page 14) the max-
imum horizontal vent length in a system with a 10' vertical
rise is 17
horizontal vent it must be reduced to 14
In Figure 16 dimension A plus B must not be greater than
14 1
FP1380
FP2546
VENTING INSTALLATION
If a 90° elbow is used in the horizontal vent run (level
height maintained) the horizontal vent length is reduced
by 36". Refer to Figure 16. This does not apply if the 90°
elbows are used to increase or redirect a vertical rise.
⁄
' (5.3 m) and if a 90° elbow is required in the
1
2
⁄
' (4.4 m).
2
90° Elbow = 36" (914 mm)
A
*NOTE: With a
24" rise, the hor-
izontal run must
be 36".
FP1381
⁄
1 ' (4.4 m).
2
Reduction
B
10'
Figure 16 -
Horizontal Run Reduction
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