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Innovative Hearth Products
DRT4000-C & DRT4200-C Series Direct-Vent Gas Fireplaces
Vent Restrictor with Vertical Terminations
When vertically terminating the vent system through the roof and using the vent restrictor,
install the vent restrictor in the top vent of the fireplace outlet.
If installing more than 6 ft of vertical venting, install the restrictor (Figure 14B), from
inside or outside the unit, in the inner fireplace collar. The vent restrictor is held in place by
friction.
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 6 ft of vertical venting, install the restrictor (Figure 14C), from
inside or outside the unit, in the inner fireplace collar. The vent restrictor is held in place by
friction.
Connecting the Vent Pipe
10.
Secure Vent
lock connections (Figures 15A–15B). 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
2. Push the vent component against the collar until it fully engages, then twist the component clockwise, running
3. If desired, a #6 x 1/2" sheet metal screw can be used at the joint, but is not required as the pipe will securely
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 178 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 15A - Connecting
Vent elbows
Vent elbows are available in 90° and 45° configurations. Refer to Figure 15C 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
Table 13 - Effective Vent Length
24
SV4.5 direct-vent system components are unitized concentric pipe components featuring positive twist
®
with the inlet of the four (4) inclined channels on the collar (Figures 15A–15B).
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
lock when twisted (Figure 15A).
Figure 15B - Connected vent
vent components
Arrow
Dimple
Dimple
Locking
Incline
Channel
Appliance Collar or
Vent Section
vent sections) for proper alignment (Figure 15C). See Connecting the vent pipe for more information.
Model
Effective Length
SV4.5L6
4-1/2"
SV4.5L12
10-1/2"
SV4.5L24
22-1/2"
components will engage and seal both the inner and outer vent pipe.
®
components
Locking
Arrow
Incline
Channel
Inches (millimeters)
Model
Effective Length
SV4.5L36
SV4.5L48
Figure 14D - Vent restrictor assembly
Base
Base Restrictor
Figure 15C - Elbow Dimensions
13-5/8
(346)
10
(254)
~45°
Non-Swivel
34-1/2"
46-1/2"
Installation
901032-00B, 07/2020
Base Restrictor
+ Wing
Base
Wing
15-1/2
(394)
9-7/8
(251)
~90°
Non-Swivel
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