Installation
900004-00, 03/2018
Innovative Hearth Products
DRT2000 and DRC2000 Direct-Vent Fireplaces
22
Vent Restrictor with Horizontal Terminations
When horizontally terminating a vent system with a vertical vent run up to 4 ft through an exterior wall, no vent
restrictor is required.
If installing more than 4 ft of vertical venting, install the restrictor (Figure 14), from inside or outside the unit, in the
inner fireplace collar. The vent restrictor is held in place by friction.
Table 14 - Effective Vent Length
Model
Effective Length
SV4.5L6
4-1/2”
SV4.5L12
10-1/2”
SV4.5L24
22-1/2”
SV4.5L36
34-1/2”
SV4.5L48
46-1/2”
Connecting the vent pipe
Secure Vent
®
SV4.5 direct-vent system components are unitized concentric pipe components featuring positive twist
lock connections (Figures 16 and 17). All of the fireplaces covered in this document are fitted with collars having
locking inclined channels. The dimpled end of the vent components fit over the fireplace/vent collar to create the
positive twist lock connection.
1. Align the dimpled end over the collar, adjusting the radial alignment until the four (4) locking dimples are aligned
with the inlet of the four (4) inclined channels on the collar (Figure 16).
2. 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.
NOTE: The unitized design of the Secure Vent
®
components will engage and seal both the inner and outer vent pipe.
3. If desired, a #6 x 1/2” screw can be used at the joint, but is not required as the pipe will securely lock when
twisted (Figure 17).
Where required, a telescopic vent section (SV4.5LA) may be used to provide the installer with an option to install
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” to 7” (38 to 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 three (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 (3) screws.
Figure 16 - Connecting vent
components
Figure 17 - Connected vent
components
Figure 18 - Elbow Dimensions
Dimple
Locking
Incline
Channel
Arrow
Appliance Collar or
Vent Section
Dimple
Locking
Incline
Channel
Arrow
SV4.5E90
(90
°
Elbow)
8 1/8 in.
(206 mm)
Swivel Joint
(360
°
swivel)
4 13/16 in.
(122 mm)
SV4.5E45
(45
°
Elbow)
Swivel Joint
(360
°
swivel)
4-13/16”
(122 mm)
8-1/8”
(206 mm)
Swivel Joint
(360°)
Swivel Joint
(360°)
SV4.5E45
(45° elbow)
SV4.5E90
(90° elbow)
Vent elbows
Vent elbows are available in 90° and 45° configurations. Refer to Figure 18 for the SV4.5E45 and SV4.5E90 elbow
dimensions. 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.
1. Rotate the elbow in a clockwise direction (to avoid the possibility of unlocking any of the previously connected
vent sections) for proper alignment (Figure 18). See Connecting the vent pipe for more information.
