17
STRAIGHT UP
VERTICAL VENTING
V (FT.)
45' MAX.
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:
You may use a 45
o
elbow
in corner installations for models
QV32 and QV36.
45-DEGREE
ELBOW
H
90-DEGREE
ELBOWS
NOTE: There MUST be a 25% reduc-
tion in total H when using flex vent
except when using the simple up and
out installation (see Figure 9).
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
maintain the necessary clearance to combustibles. How-
ever, the vent attachment point and the firestop location
are considered to be supports.
3” CLEARANCE
TERMINATION
CAP
FLEX-VENT
1”
CLEARANCE
V
CAP