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19
Horizontal / Inclined Run
Support Brackets
Building
Support
Framing
SV4.5E90
Elbow
Ceiling
Firestop / Spacer
SV4.5VF
When Using Secure Flex,
Use Firestop / Spacer SF4.5VF
Fireplace
SV4.5L6/12/24/36/48
Vent Sections
Vertical
Rise
SV4.5HT-2
Termination
Shown
Support Bracket Spacing
Every 5 ft (1.52 m)
Exterior
Wall
SV4.5HT-2
Termination
Shown
Figure 31 - TYPICAL HORIZONTAL VENT INSTALLATION
See Figure 18 on Page 14 or Figure 21 on
Page 15 for vertical vent section support.
B. Frame exterior wall opening -
Locate the center of the vent outlet on
the exterior wall according to the dimen-
sions shown in Figure 14 on Page 11. Cut
and/or frame an opening, 10-1/2" x 12-1/8"
(267 mm x 308mm) inside dimensions, about
this center.
C. Frame ceiling opening - If the vertical route
is to penetrate a ceiling, use plumb line to locate
the center above the appliance. Cut and/or frame
an opening, 10-1/2" x 10-1/2" (267 mm x 267
mm) inside dimensions, about this center (refer
to Figure 19 on Page 15).
D. Attach vent components to appliance - To
attach a vent component to the appliance collar,
align the dimpled end over the collar, adjust-
ing the radial alignment until the four locking
dimples are aligned with the inlets of the four
incline channels on the collar (refer to Figure
20 on Page 15).
Push the vent component against the collar
until it fully engages, then twist the component
clockwise, running the dimples down and along
the incline channels until they seat at the end
of the channels.
The unitized design of the Secure Vent
components will engage and seal both the
inner and outer pipe elements with the same
procedure. Sealant and securing screws are
not required.
Note: An elbow may also be attached to the
appliance collar. Attach in the same manner
as you would a vent section.
E. Attach vent components to each other
- Other vent sections may be added to the pre-
viously installed section in accordance with the
requirements of the vent tables. To add another
vent component to a length of vent run, align the
dimpled end of the component over the inclined
channel end of the previously installed section,
adjusting the radial alignment until the four lock-
ing dimples are aligned with the inlets of the four
incline channels of the previous section.
Push the vent component against the previous
section until it fully engages, then twist the
component clockwise running the dimples down
and along the incline channels until they seat at
the end of the channels.This seating position
is indicated by the alignment of the arrow and
dimple as shown in Figure 20 on Page 15.
F. Install fi restop/spacer at ceiling -
When using Secure Vent, use SV4.5VF fi restop/
spacer at ceiling joists; when using Secure Flex,
use SF4.5VF fi restop/spacer.
If there is living space above the ceiling level,
the fi restop/ spacer must be installed on the
bottom side of the ceiling. If attic space is
above the ceiling, the fi restop/ spacer must be
installed on the top side of the joist. Route the
vent sections through the framed opening and
secure the fi restop/spacer with 8d nails or other
appropriate fasteners at each corner.
Remember to maintain 1" (25 mm) clearance
to combustibles, framing members, and attic
or ceiling insulation when running vertical
chimney sections.
G. Support the vertical run sections -
See Section E on Page 15.
H. Change vent direction - At transition from or
to a horizontal/inclined run, install the SV4.5E45
and SV4.5E90 elbows in the same manner as
the straight vent sections. The elbows feature a
twist section to allow them to be routed about the
center axis of their initial collar section to align
with the required direction of the next vent run
element. Twist elbow sections in a clockwise
direction only so as to avoid the possiblity of
unlocking any of the previously connected vent
sections. See Figure 22 on Page 16.
I. Continue installation of horizontal/inclined
sections - Continue with the installation of the
straight vent sections in horizontal/inclined run
as described in Step E. Install support straps
every 5 ft. (1.52 m) along horizontal/inclined
vent runs using conventional plumber’s tape.
See Figure 31. It is very important that the
horizontal/inclined run be maintained in a
straight (no dips) and recommended to be in
a slightly elevated plane, in a direction away
from the fi replace of 1/4" rise per foot (20 mm
per meter) which is ideal, though rise per foot
run ratios that are smaller are acceptable all the
way down to at or near level.
It is important to maintain the required clear-
ances to combustibles: 1" (25 mm) at all sides
for all vertical runs; and 3" (76 mm) at the top,
1" (25 mm) at sides, and 1" (25 mm) at the
bottom for all horizontal/inclined runs.