Installation
901032-00B, 07/2020
Innovative Hearth Products
DRT4000-C & DRT4200-C Series Direct-Vent Gas Fireplaces
23
9.
Install the Vent Restrictor (if necessary)
1.
Use the vent run descriptions in
Figure 14A
to determine if a vent restrictor is necessary.
2.
If necessary, assemble the vent restrictor and wing as detailed in
Figures 14A
and
14D
3.
If necessary, install the appropriate vent restrictor
(
Figure 14B or 14C
).
NOTE:
The vent restrictor is shipped in the firebox.
Figure 14A - When to use a vent restrictor
Base
Restrictor
1
3
20
40
6
20
40
25 ft Maximum
horizontal run (flat to near level)
60 ft Maximum
vertical run *
60
1.9
25
Horizontal Distance (ft)
Vertical Height (ft) from top of unit
Vertical Height (ft)
2
5
Elbow**
5
10
15
Base restrictor
+ wing
6 ft Minimum vertical run*
6 ft Minimum vertical run
None
*
* For straight runs or runs with elbows as illustrated in Vertical Vent Figures/Tables
starting on
Page 30.
** No rise required.
Figure 14B - Vent restrictor installation, Top vent
Figure 14C - Vent restrictor installation, Rear vent
Installation in top vent. Put flap (and wing if installed)
directed toward the rear of unit.
Installation in rear vent. Install so flap (and wing if installed)
will stay closed
To Termination
Flap Must Move
Up Freely
Exhaust From Inside Fireplace
To Termination
Flap Must
Move Up
Freely
Exhaust
From
Inside
Fireplace
SEE PAGE 23 FOR VENT RESTRICTOR ASSEMBLY INSTRUCTIONS