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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
20
HORIZONTAL (OUTSIDE WALL)
TERMINATION SYSTEM
See Figure 33, and Figures 36 to 41 (Pages
22 to 24) and their associated Horizontal Vent
Table which illustrates the horizontal venting
configurations that are allowed to be used with
these appliances. Secure Vent pipe applications
are shown in these figures; Secure Flex pipe may
also be used (see Page 25). A Horizontal Vent
Table summarizes each system’s minimum and
maximum vertical and horizontal length values
that can be used to design and install the vent
components in a variety of applications.
Both of these horizontal vent systems terminate
through an outside wall. Building Codes limit or
prohibit terminating in specific areas. Refer to
Figure 5 on Page 7 for location guidelines.
Secure Vent SV4.5 direct-vent system compo-
nents are unitized concentric pipe components
featuring positive twist lock connection, (refer
to Figure 19 on Page 15). All of the appli-
ances covered in this document are fitted with
collars having locking inclined channels. The
dimpled end of the vent components fit over
the appliance collar to create the positive twist
lock connection.
A. Plan the vent run -
Analyze the vent routing and determine the
types and quantities of sections required
4-1/2" (114 mm), 10-1/2" (267 mm), 22-1/2" (572
mm), 34-1/2" (876 mm) and 46-1/2" (1181 mm)
net section lengths are available. It is recom-
mended that you plan the vent lengths so that
a section joint does not occur within the space
defined by ceiling joists, roof rafters or wall studs.
Make allowances for elbows as indicated in Figure
24 on Page 16.
Maintain a minimum 1" (25 mm) clearance to
combustibles on the vertical sections. Clear-
ances for the horizontal runs are; 3" (76 mm)
on top, 1" (25 mm) on sides, and 1" (25 mm)
at the bottom.
Figure 33 -TYPICAL HORIZONTAL VENT INSTALLATION
See Figures 22 and 23 on
Page 16 for vertical vent
section support.
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
Support Bracket Spacing
Every 5 ft (1.52 m)
Exterior
Wall
TYPICAL HORIZONTAL VENT INSTALLATION
SV4.5HT-2
Termination
Shown
SV4.5HT-2
Termination
Shown
B. Frame exterior wall opening -
Locate the center of the vent outlet on the exte-
rior wall according to the dimensions shown in
Figures 11 and 12 on Pages 10 and 11.
Cut and/or frame an opening, 10-1/2" x 12-1/8"
(267 mm x 308 mm) 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 18 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
19 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.
E. Attach vent components to each other
- Other vent sections may be added to the
previously 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 locking 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 19 on
Page 15.
F. Install firestop / spacer at ceiling -
Install a Secure Vent SV4.5VF firestop/spacer
at the bottom side of the ceiling to the ceiling
joists. Route the vent sections through the
framed opening and secure the firestop/spacer
with appropriate fasteners at each corner.
If there is living space above the ceiling level,
the firestop/ spacer must be installed on the
bottom side of the ceiling. If attic space is
above the ceiling, the firestop/ spacer must
be installed on the top side of the joist. Route
the vent sections through the framed opening
and secure the firestop / 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. Attic insulation shield
(H3907) may be used to obtain the required
clearances indicated here. See installation
accessories tables on Pages 34 through 36.
G. Support the vertical run sections -
See Step E on Page 16.
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 direc-
tion of the next vent run element. Twist elbow
sections in a clockwise direction only so as
to avoid the possibility of unlocking any of
the previously connected vent sections. See
Figure 24 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 33. 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 fireplace 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. Use a carpenter’s
level to measure from a constant surface and
adjust the support straps as necessary.
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