Installation
900684-00 03/2017
Innovative Hearth Products
Gemini™ Series Direct-Vent Gas Fireplaces
23
10.
Install the Vent Restrictor (if necessary)
1. Use the vent run descriptions in Figure 12 to determine if a vent restrictor is necessary.
2. If necessary, assemble the vent restrictor and wing as detailed in Figures 12 and 15.
3. If necessary, install the appropriate vent restrictor (Figure 13 or 14).
NOTE: If installing the vent restrictor in a rear vent application, ensure the factory-installed intake air baffle is in place (Figure 14).
NOTE: The vent restrictor is shipped in the firebox.
Figure 12 - When to use a vent restrictor
Figure 13 - Vent restrictor installation, Top vent
2 1/2”
Break-Away
1
3
20
40
6
10
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
3” Base + wing
3” Base
6 ft Minimum
vertical run
6 ft Minimum vertical ru
n
None
*
*
***
* For straight runs or runs with elbows as illustrated in Vertical Vent Figures/Tables
starting on Page 29
** No rise required.
*** On 33” Models, use the 3” base restrictor. Do not raise the break-away tab.
NOTE: When venting Rear Horizontal with slip collar and termination only, install base
vent restrictor with the breakaway portion raised.
Figure 14 - Vent restrictor installation, Rear vent
Figure 15 - Vent restrictor assembly
Inner Fireplace Collar
Appliance Rear
Vent Outlet
U-Shaped Vent
Restrictor
Intake Air Baffle
With
break-away
raised***
Base Vent Rest Wing
Inner
Fireplace
Collar
U-Shaped Vent
Restrictor
Appliance Top Vent Outlet
Base Vent Restrictor
