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Innovative Hearth Products
DRT4000 Direct Vent Gas Fireplace
HORIZONTAL (OUTSIDE WALL)
TERMINATION SYSTEM
Figures 35, and Figures 38-44 on Pages 23-
25 and their associated Horizontal Vent Table
illustrate the various horizontal venting con-
figurations that are possible for use with these
appliances. Secure Vent
pipe applications
®
are shown in these figures; Secure Flex
may also be used. A Horizontal Vent Table sum-
marizes 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 7 on Page 9 for location guidelines.
Secure Vent SV4.5 direct vent system components
are unitized concentric pipe components featuring
positive twist lock connection, (refer to Figure 23
on Page 17). 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. It is recommended that you
plan the venting so that a joint does not occur in the
ceiling or roof joists. Allow for elbows as indicated
in Figure 25 on Page 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 ex-
terior wall according to the dimensions shown
in Figure 13 on Page 12. Cut and/or frame an
opening, 10-1/2" x 12 -1/8" (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, 10-1/2" x 10-1/2" (267 mm x 267
mm) inside dimensions, about this center (refer
to Figure 22 on Page 17).
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 23 on Page 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.
Support
Building
Brackets
Support
Framing
SV4.5E90
Elbow
pipe
®
Ceiling
Vertical
Rise
Figure 35
- Typical Horizontal Vent Installation
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.
E. Attach vent components to each other - Other
vent sections may be added to the previously
installed section in accordance with the require-
ments 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 23 on Page 17.
F. 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 appropri-
ate fasteners at each corner. The gap between
the vent pipe and a firestop can be sealed with
noncombustible caulking.
Remember to maintain 1" (25 mm) clearance
to combustibles, framing members, and attic
or ceiling insulation when running vertical
chimney sections.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
TYPICAL HORIZONTAL VENT INSTALLATION
Horizontal / Inclined Run
SV4.5L6/12/24/36/48
Vent Sections
Firestop/Spacer
Support bracket spacing
every 5 ft (1.52 m)
See Figure 24 on Page 17 for
Vertical Vent
vertical vent section support
Fireplace
G. Support the vertical run sections -
On the vertical run, support the venting sys-
tem every 8 feet (2.4m) above the fireplace
vent outlet with field provided support straps
(Plumber's tape). Attach the straps to the vent
pipe and secure to the framing members with
nails or screws. See Figure 24 on Page 17.
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 25 on
Page 18.
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 35. It is very important that the
horizontal/inclined run be maintained in a
straight (no dips), slightly elevated plane.
The recommended incline is approximately
1/4" per foot (20 mm per meter) horizontal,
in a direction away from the fireplace. The
rise per foot run ratios that are smaller are
acceptable all the way down to at or near
level. 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
Installation and Operation Instructions
900357-00, 09/2015
SV4.5HT-2
Termination
Exterior
Wall
SV4.5HT-2
Termination
Exterior
Wall
21
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