11
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 21To add another vent component to a length of
vent run, align the dimpled end 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 20.
D. Install firestop/spacer at ceiling - When using
Secure Vent, use SV4.5BF firestop/spacer at ceil-
ing joists; when using Secure Flex, use SF4.5BF
firestop/spacer. 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 appro-
priate fasteners at each corner.
Remember to maintain 1" (25 mm) clear-
ance to combustibles, framing members,
and attic or ceiling insulation when running
vertical chimney sections.
E. Support the vertical vent run sections -
Support the vertical portion of the venting sys-
tem every 8 feet (2.4m) above the fireplace vent
outlet using field provided support straps (con-
ventional plumber's tape).
Secure the plumber's
tape to the framing members with nails or
screws.
1 inch
(25.4 mm)
minimum
clearance to
combustibles
Support Straps
(Plumber’s tape)
8 feet (2.4 m)
Maximum
Blocking
Figure 18Figure 20Figure 19Vertical (Offset) Installation
Analyze the vent routing and determine the
quantities of vent sections and number of el-
bows required. Refer to Vertical Vent Figures
and Tables on page 13 and 14 to select the type
of vertical installation desired. Vent sections
are available in net lengths of 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). Refer to the Vent
Section Length Chart on page 10 for an aid in
selecting length combinations. Elbows are avail-
able in 90° and 45° configurations. Refer to
Figure 22
for the SV4.5E45 and SV4.5E90
elbow dimensional specifications.
Where required, a telescopic vent section
(SV4.5LA) may be used to provide the installer
with an option in installing in tight and confined
spaces or where the vent run made up of fixed
length pieces develops a joint in a undesirable
location, or will not build up to the required
length. The SV4.5LA Telescopic Vent Section
has an effective length of from 1 ¹⁄₂" (38 mm) to
7 ¹⁄₂" (191 mm). The SV4.5LA is fitted with a
locking inclined channel end (identical to a
normal vent section component) and a plain
end with 3 pilot holes. Slip the plain end over the
locking channel end of a standard SV4.5 vent
component the required distance and secure
with three screws.
Maintain a minimum 1" (25 mm) clearance to
combustible materials for all vertical elements.
Clearances for all horizontal elements are 3"
(76 mm) on top, 1" (25 mm) on sides and 1"
(25 mm) on the bottom.
A. Frame ceiling opening - Use a plumb line from
the ceiling above the appliance to locate center of
the vertical run. Cut and/or frame an opening,
10¹⁄₂" x 10¹⁄₂" (267mm x 267mm) inside dimen-
sions, about this center mark (
Figure 18
).
To attach a vent component to the appliance
collar, align the dimpled end over the collar,
adjusting the radial alignment until the four
locking dimples are aligned with the inlet of the
four inclined channels on the collar (
refer to
Figure 19
). 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 com-
ponents will engage and seal both the inner
and outer pipe without the need for sealant or
screws. If desired, a #6 x ¹⁄₂" screw may be
used at the joint, but is not required as the pipe
will securely lock when twisted.
Note: An elbow may also be attached to the
appliance collar. Attach in the same manner as
you would a vent section.
C. 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 vertical vent figures
and tables.
B. Attach vent components to appliance -
Secure Vent SV4.5 direct vent system compo-
nents are unitized concentric pipe components
featuring positive twist lock connections (
see
Figure 19
).
10¹⁄₂” Min.
(267 mm)
10¹⁄₂” Min.
(267 mm)
First Vent
Component
Align the dimple (four places)
with the opening of the locking
incline channel on appliance
collar. Twist vent component
clockwise to engage and seal.
Locking
Incline Channel
Dimple
Appliance collar
Vent / Appliance Collar
Connection
Align the dimple (four places) of the
upper vent section with the opening of
the locking incline channel on the
lower vent section. Twist vent
component clockwise to engage and
seal until arrow and dimple align.
Locking
Incline Channel
Dimple
Arrow
Connected
Vent Sections
Vent / Vent Section
Connection
Arrow
Arrow
All of the appliances covered in this document are
fitted with collars having locking inclined chan-
nels. The dimpled end of the vent components fit
over the appliance collar to create the positive
twist lock connection.