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HORIZONTAL (OUTSIDE WALL)
TERMINATION SYSTEM
Figure 34, and Figures 38 to 44 on page 17 to
19 and their associated Horizontal Vent Table
illustrate the horizontal venting configurations
that are allowed to be used with these appli-
ances. Secure Vent pipe applications are shown in
these figures; Secure Flex pipe may also be used.
See page 20. A Horizontal Vent Table summa-
rizes 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 8 on page 6 for location guidelines.
Secure Vent SV4.5 direct vent system compo-
nents are unitized concentric pipe compo-
nents featuring positive twist lock connection,
( refer to Figure 19 on page 11). All of the
appliances covered in this document are fitted
with collars having locking inclined channels.
The dimpled end of the vent components fit
f i r e - p a r t s . c o m
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 section joint does not occur within the
space defined by ceiling joists, roof rafters or
wall studs. Make allowances for elbows as indi-
cated in Figure 27 on page 12 .
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 Figures 9 (DMSTNM-2), 10
(DMPFNM-2) on page 7.
Cut and/or frame an opening, 10¹⁄₂" x 12¹⁄₈"
(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, 10¹⁄₂" x 10¹⁄₂" (267
mm x 267 mm) inside dimensions, about this
center (refer to Figure 18 on page 11 ).
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 19 on page 11) .
Figure 23
on page 12
Figure 34
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 Se-
cure 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 previ-
ously installed section in accordance with the
requirements of the vent tables. To add an-
other 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 align-
ment 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 en-
gages, 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 11.
F. Install firestop/spacer at ceiling between
stories - Install a firestop/spacer (catalog no.
96K87 - Secure Vent; catalog no.19M41 -
Secure Flex) 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.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Z\v
Remember to maintain 1" (25 mm) clear-
ance 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 in-
stallation accessories table on page 27.
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 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 24 on page 11 .
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 34. It is very important that the
horizontal/inclined run be maintained in a
straight (no dips) and slightly elevated plane in
a direction away from the fireplace of ¹⁄₄" rise
per foot (20 mm per meter) of horizontal vent.
Use a carpenter's level to measure from a
constant surface and adjust the support straps
as necessary.
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
15
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