Installation
900079-00, 02/2014
Innovative Hearth Products
Astria™ Sirius Linear Direct-Vent Gas Fireplaces
20
VENT SYSTEM PREPARATION
7.
Select a Horizontal or Vertical Vent System
1.
With the fireplace secured in the framing, determine the vent route and identify the exterior termination location.
The following sections describe vertical (roof) and horizontal (exterior wall) vent applications. Use only approved
vent components (
Page 8
and
Page 45
).
NOTE:
This fireplace must be vented directly to the outside.
WARNING
The vent system may not service multiple appliances, and must never be connected to a
flue serving a separate solid fuel burning appliance.
NOTE:
The vent pipe is tested to be run inside an enclosed wall (such as a chase). There is no requirement for
inspection openings in the enclosing wall at any of the joints in the vent pipe.
8.
Install the Vent Restrictor (if necessary)
1.
Use the vent run descriptions in
Figure 14
to determine if a vent restrictor is necessary.
2.
If necessary, assemble the vent restrictor and wings as detailed in
Figure 14
and
Figure 16
.
3.
If necessary, install the appropriate vent restrictor with the flaps facing up (
Figure 15
). The vent restrictor is held in
place by friction. The vent restrictor must not be visible inside the firebox.
NOTE:
If the baffle and back panel are installed, remove them before installing the vent restrictor.
NOTE:
The vent restrictor is shipped in the firebox.
Figure 14: When to use a vent restrictor
Figure 15: Vent restrictor installation, Top vent
Base
3
5
10
45
6
40
15 ft Maximum
horizontal run
60 ft Maximum vertical run
60
2
15
Horizontal Distance (ft)
Vertical Height (ft)
Vertical Height (ft)
4
6
1
4.5
6
7.5
Position 2
Position 1
6 ft Minimum
vertical run
6 ft Minimum
10
9
*
*
U-Shaped
Vent
Restrictor
Inner
Fireplace
Collar
Appliance Top Vent Outlet
Vent
Collar
Vent
Restrictor
(held in
place by
friction)
Figure 16: Vent restrictor assembly
Base Vent Restrictor
Vent Restrictor Position 1
Vent Restrictor Position 2
* For straight runs or runs with elbows as illustrated in Vertical Vent Figures/Tables starting on Page 26.
