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Hearthstone Quality Home Heating Products, Inc
Vent Pass-Through (Parallel Wall Installation on an Interior Partition Wall)
1. An unobstructed wall pass-through is required to allow for a safe installation of the fireplace vent
components. This will necessitate removal of a portion of the interior wall covering (e.g., sheetrock or
plaster and lath), on both sides of the partition wall and any adjacent internal wall materials (like insulation).
2. Scribe a 9 5/8" diameter hole around the vent pass-through center mark using a compass.
3. Use a long drill (1/8" diameter) that is held square and level to the inside wall to transfer the vent pass-
through center location from the inner wall covering through to the wall covering on the back side of the
partition wall.
4. Carefully cut the inner wall covering along the scribed line and remove the circular wall piece. Note: It is
important to locate electrical wiring in the wall before beginning the installation process. An electrician
should be consulted if there is any question about wiring locations. Failure to locate and protect
wiring during the installation process my result in electrical shock or fire.
5. Remove any insulation materials from wall in the area defined by the pass-through hole.
6.
Building codes in your area may require that you add blocking above and below the vent opening. The
blocking should be above and below the 9 5/8" vent opening you made in the wall and should not obstruct
that opening. The blocking should extend to adjacent wall studs.
7. Next, mark and cut a 9 5/8" diameter hole through the wall covering on the back side of the partition wall
using the locating hole you drilled in Step 2.
8. When installing the fireplace on a partition wall, the venting may be penetrating one or more interior walls,
an exterior wall, the ceiling or the roof.
It is important to lay out the locations of all vent pass-through's before you begin the installation to insure
9.
that the venting will line-up correctly and that the walls and ceiling meet the needed clearances to the vent
pipe.
10. The vent pass-through in the partition wall where the fireplace is mounted must be done in accordance with
the instructions for a parallel wall installation on an outside wall, following steps 1 through 6.
Vent Pipe Heat Shields
Special telescoping double heat shields for the vent pipe are provided with the ORION 26 fireplace. These
heat shields are a critical part of a safe installation. They are designed to protect combustible materials in
the wall immediately behind the fireplace. The only exception to this is if the corner installation kit (pt# 90-
99901) is used. With the corner kit, the heat shields are installed where the venting passes through the first
adjacent side wall. See the instructions included with the corner kit for specific details.
Gas Supply Line
1. Once the vent pass-through (or pass-through's) are finished, the gas supply line should be installed. The
supply line should exit the wall that the fireplace will be installed on at the location specified on the installation
template We suggest the installation of a shut-off valve in the supply line between the wall and the
connection to the fireplace. Your professional gas installer or local gas company will determine the specific
requirements for the gas supply line as the requirements may vary in different locations. In every case, the
installation must conform with local codes or, in the absence of local codes, with the National Fuel Gas Code,
ANSI Z223.1 or the Canadian Installation Code, CAN/CGA B149.
ORION 26 Series 8910
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