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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Vertical
Rise
SV4.5E90
Elbow
Horizontal / Inclined Run
SV4.5HT-2
Termination
Firestop/Spacer
SV4.5L6/12/24/36/48
Vent Sections
Support Bracket Spacing
Every 5 ft (1.52 m)
See Figure 20 on page 12 for
vertical vent section support.
SV4.5HT-2
Termination
Support
Brackets
Building
Support
Framing
Ceiling
Fireplace
Exterior
Wall
Exterior
Wall
TYPICAL HORIZONTAL VENT INSTALLATION
Figure 31
Secure Vent SV4.5 direct vent system compo-
nents are unitized concentric pipe components
featuring positive twist lock connection, (
refer to
Figure 18
on page 12). All of the appliances
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. Plan the
vent lengths so that a joint does not occur at the
intersection of ceiling or roof joists. Make allow-
ances for elbows as indicated in
Figure 18
.
Maintain a minimum 1" (25 mm) clearance to
combustibles on the vertical sections. Clearances
for the horizontal runs are; 3" (76 mm) on top, 1"
(25 mm) on sides, and 1" (25 mm) at the bottom.
B. Frame exterior wall opening -
Locate the center of the vent outlet on the exterior wall
according to the dimensions shown in
Figure 9
on
page 7. Cut and/or frame an opening, 10-1/2" x 12-1/8"
(267 mm x 308mm) inside dimensions, about this
center.
F. Install firestop/spacer at ceiling -
When using Secure Vent, use SV4.5VF fir-
estop/spacer at ceiling joists; when using Se-
cure Flex, use SF4.5VF firestop/spacer. If there
is living space above the ceiling level, the
firestop/ spacer must be installed on the bot-
tom side of the ceiling. If attic space is above
the ceiling, the firestop/ spacer must be in-
stalled 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.
The unitized design of the Secure Vent compo-
nents 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.
Remember to maintain 1" (25 mm) clearance
to combustibles, framing members, and attic
or ceiling insulation when running vertical
chimney sections.
E. 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 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 19 on page 12.
D. Attach vent components to appliance - 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 inlets of the four incline channels on the
collar (
refer to Figure 18
on page 12). 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.
Both of these horizontal vent systems terminate
through an outside wall. Building Codes limit or
prohibit terminating in specific areas. Refer to
Figure 8
on page 7 for location guidelines.
Figure 31, and Figures 34 to 41 on pages 18,
19 and 20
and their associated Horizontal Vent
Table illustrate the various horizontal venting
configurations that are possible for use with
these appliances. Secure Vent pipe applica-
tions are shown in these figures; Secure Flex
pipe may also be used. A Horizontal Vent Table
summarizes each system’s minimum and maxi-
mum vertical and horizontal length values that
can be used to design and install the vent
components in a variety of applications.
HORIZONTAL (OUTSIDE WALL)
TERMINATION SYSTEM
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 17
on page 12 ).
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 fireplace of 1/4" rise per foot
(20 mm per meter) which is ideal, though rise
per foot run ratios that are smaller are accept-
able 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
G. Support the vertical run sections -
See Section E on page 12.
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 possiblity of unlocking any of the
previously connected vent sections. See
Fig-
ure 21 on page 13
.