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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
10-1/2” Min.
(267 mm)
10-1/2” 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
1 inch
(25.4 mm)
minimum
clearance to
combustibles
Support Straps
(Plumber’s tape)
8 feet (2.4 m)
Maximum
Blocking
Figure 16
Figure 17
Figure 19
Figure 18
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 18.
D. Install firestop/spacer at ceiling - When
using Secure Vent, use SV4.5VF firestop/spacer
at ceiling joists; when using Secure Flex, use
SF4.5VF 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 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
(96K94) may be used to obtain the required
clearances indicated here. See installation
accessories table on page 27.
E. Support the vertical vent run sections -
Note - Proper venting support is very impor-
tant. The weight of the vent must not be sup-
ported by the fireplace in any degree.
Support the vertical portion of the venting sys-
tem every 8 feet (2.4m) above the fireplace vent
outlet. One method of support is by utilizing
field provided support straps (conventional
plumber's tape). Secure the plumber's tape to
the framing members with nails or screws.
Loop the tape around the vent, securing the
ends of the tape to the framing. If desired, sheet
metal screws #6 x 1/2" length may be used to
secure the support straps to the vent pipe. See
Figure 19.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Vertical (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 14 and 15 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 11 for an
aid in selecting length combinations. Elbows
are available in 90° and 45° configurations.
Refer to
Figure 20
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, 10-1/2" x 10-1/2" (267mm
x 267mm) inside dimensions, about this
center mark (
Figure 16
).
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 17
). 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
without the need for sealant or screws. If
desired a #6 x 1/2" screw may be used at the
joint, but it 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 previ-
ously installed section in accordance with the
requirements of the vertical vent figures and
tables. To add another vent component to a
length of vent run, align the dimpled end over
the inclined channel end of the previously in-
stalled section, adjusting the radial alignment
until the four locking dimples are aligned with
the inlets of the four incline channels of the
previous section.
B. Attach vent components to appliance -
Secure Vent SV4.5 direct vent system com-
ponents are unitized concentric pipe compo-
nents featuring positive twist lock connec-
tions (
see Figure 18
).
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.