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SUPERIOR
Vertical (Offset) Installation
Analyze the vent routing and determine the
quantities of vent sections and number of
elbows required. Refer to Vertical Vent
Figures and Tables on Page 14 to select
the type of vertical installation desired.
Vent sections are available in net lengths of
4 1/2 in. (114 mm), 10 1/2 in. (267 mm),
22 1/2 in. (572 mm), 34 1/2 in. (876 mm)
and 46 1/2 in. (1181 mm). Refer to the Vent
Section Length Chart on Page 14 for an aid
in selecting length combinations. Elbows are
available in 90° and 45° configurations. Refer
to Figure 25 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 in. (38 mm) to 7 1/2 in.
(191 mm). The SV4.5LA is fitted with a
locking inclined channel end (identical to a
f i r e - p a r t s . c o m
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 in. (25 mm)
clearance to combustible materials for
all vertical elements. Clearances for all
horizontal elements are 3 in. (76 mm)
on top, 1 in. (25 mm) on sides and 1 in.
(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 in. x 10 1/2 in. (267 mm
x 267 mm) inside dimensions, about this
center mark (Figure 20).
B. Attach vent components to appliance—
Secure Vent
SV4.5 direct vent system
®
components are unitized concentric pipe
components featuring positive twist lock
connections (see Figure 21). All of the
appliances covered in this document are
fitted with collars having locking inclined
channels.
Min. 10-1/2"
Min. 10-1/2"
(267 mm)
Figure 20: Frame Ceiling Opening
• DIRECT-VENT GAS FIREPLACES (SDV35-N-2) • INSTALLATION INSTRUCTIONS
®
The dimpled end of the vent components fit over
the appliance collar to create the positive twist
lock connection.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 21). 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
®
both the inner and outer pipe without the need for
sealant or screws. If desired a #6 x 1/2 in. 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
previously 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 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 21.
Arrow
Appliance Collar or
Vent Section
(267 mm)
Figure 21: Connecting Vent
Components
D1. Install firestop/spacer at ceiling—
When using Secure Vent, use SV4.5VF
firestop/spacer at ceiling joists; when using
Secure Flex
®
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.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
components will engage and seal
Align the dimple (four places) of
the upper vent section with the
opening of the locking incline
channel on the lower vent sec-
tion or appliance collar. Twist
vent component clockwise to
engage and seal until arrow and
dimple align.
Dimple
Locking
Incline
Channel
Connected Vent
Arrow
Sections
, use SF4.5VF firestop/spacer. If
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 in. (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
Pages 33 and 34. The gap between the vent
pipe and a vertical firestop can be sealed
with non-combustible caulking.
D2. Install firestop thimble at the ceiling to
roof location—Position appropriate firestop
thimble at the bottom side of ceiling and secure
temporarily with two appropriate fasteners.
Attach permanently, using at least two more
fasteners, after vent sections have been as-
sembled through the firestop thimble and after
any necessary adjustments have been made.
Ensure the thimble penetrates the roof opening.
The thimble must extend completely through the
ceiling or roof cavity to the outermost plane of
the roof. Use thimble extension SVTE26 when
the distance between the outside of the roof and
the inside of the ceiling exceeds the height of the
firestop thimble. The thimble provides for zero
clearances to combustibles and must be used
at the ceiling/roof in manufactured homes with
Secure Vent double wall vent sections. Maintain
1 in. (25.4 mm) clearance between the thimble
and the outer pipe of the secure vent chimney
system. See Figure 22 for pitched roofs or flat
roofs with flat ceilings or Figure 23 for pitched
roofs with cathedral ceilings.
Outer Pipe Of
Chimney
14 in. Min.
Firestop
Thimble
Pitched Roof
Note: Trim Thimble/
Extension To Desired Length
And Pitch At The Roof Line
14 in. Min.
Thimble
Extension
SV-FSTFE
Firestop
Thimble
Pitched Roof
Outer Pipe Of
14 in. Min.
Chimney
Firestop
Thimble
Bow Roof
Figure 22: Roof Penetration
Outer Pipe Of
Chimney
13 in.
15
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