Installation
900077-00, 07/2015
Innovative Hearth Products
DRL6500 Linear Direct-Vent Gas Fireplaces
21
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
* For straight runs or runs with elbows as illustrated in Vertical Vent Figures/Tables starting on Page 27.
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 13
), 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 6 ft through an exterior wall, no vent
restrictor is required.
If installing more than 6 ft of vertical venting, install the restrictor (
Figure 13
), from inside or outside the unit, in the
inner fireplace collar. The vent restrictor is held in place by friction.
Table 16 - 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”
Figure 12 - When to use a vent restrictor
Base
No Restrictor
3.3
10
20
40
6
40
15 ft Maximum
horizontal run
60 ft Maximum vertical run
60
2
15
Horizontal Distance (ft)
Vertical Height (ft)
Vertical Height (ft)
6 1/2
13 1/2
1’ for 42”
4.75 7.5
9
Position 2
Position 1
6 ft Minimum
vertical run
6 ft Minimum
10
6” for 54”
to elbow
*
Figure 13 - Vent restrictor installation, Top vent
U-Shaped
Vent
Restrictor
Inner
Fireplace
Collar
Appliance Top Vent Outlet
Vent
Collar
Vent
Restrictor
(held in
place by
friction)
Figure 14 - Vent restrictor assembly
Base Vent Restrictor
Vent Restrictor Position 1
Vent Restrictor Position 2
