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17
STRAIGHT UP
VERTICAL VENTING
V (FT.)
45' MAX. (13.7m)
Figure 10. Straight up Vertical Venting
Use SL D-Series
components only.
NOTE: For vertical venting
over 20 feet a restrictor plate
is recommended for improved
flame appearance.
STRAIGHT OUT HORIZONTAL VENTING
H
Max. Run
36" (914 mm)
Use D-Series
components
only.
Figure 11. Straight Out Horizontal Venting
Note: Use two 90
o
elbows for corner
installations.
Figure 9.
Flex Vent
The flex vent must be supported with the spacing between
support intervals not exceeding 4 feet, with no more than ½
inch sag between supports.
A support is required at each change in venting direction,
and in any location where it is necessary to maintain the
necessary clearance to combustibles. A simple “up and out”
installation (Figure 9) requires only enough support to main-
tain the necessary clearance to combustibles. However, the
vent attachment point and the firestop location are consid-
ered to be supports.
3” CLEARANCE
TERMINATION
CAP
FLEX-VENT
1”
CLEARANCE
Note: There MUST be a 25% reduction
in total H when using flex vent, except
when using the simple up and out
installation (see Figure 9).
H
90-DEGREE
ELBOWS