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Hearthstone Quality Home Heating Products, Inc
Installing the Outer Vent Heat Shields (Partition Wall Installation)
1. Before you install the additional vent pipe and
elbow(s) that will complete the venting
installation, you must first install the second
sections of the vent pipe heat shields to protect
the combustible materials around the vent pipe
pass-through in the partition wall that the
fireplace is mounted on. Each shield half simply
slips over the half you previously attached to the
fireplace mounting plate and that can now be
seen inside the vent pass-through in the
partition wall.
2. Install the outer shield first and the inner
second. Leave at least 2" of both shields
protruding past the partition wall framing or wall
covering. See the illustration on page 24.
Vent Pipe and Vent Termination Installation (Partition Wall Installation)
1. The specific details of the vent configuration from the vent starter pipe on the fireplace to the horizontal or
vertical vent termination (cap) when the fireplace is installed on an interior wall of the house will vary
depending on the location of the fireplace on the wall, what is on the back side of the wall, where the vent
termination will be located (roof or exterior wall) and on other code requirements for the location of the vent
termination as shown page 15. However, the maximum vent length, measured along the centerline of the
pipe, from the back of the fireplace to the start of the vent termination cannot exceed 30 feet, including a
maximum of 20 feet of vertical rise and a maximum of 10 feet of horizontal run. If more than two 90°
elbows (or equivalent 45° elbows) are needed for your installation, the maximum amount of horizontal run
allowed is reduced. See the venting section starting on page 8 for specific information. It is important to
plan the installation in advance so that you can accurately locate the any wall or ceiling pass-through's and
the vent termination on the exterior wall or roof. The vent pipe sections are available only in certain
increments of length and in adjustable length sections. Plan carefully before you start!
2. You will find it helpful to leave access to the area behind the partition wall to facilitate installation of the vent
components. The pipe sections may have twist lock connections which will be difficult to execute without
good access.
3. Be sure that the two vent pipe heat shields extend at least 2" beyond the rear side of the partition wall
adjacent to the fireplace after the venting is installed.
4. Maintain a minimum 1 1/2" unobstructed air space around the vent pipe where it passes through other
interior walls, the ceiling, the exterior wall or the roof.
5. Note: Vent manufacturer's instructions and some building codes may require the addition of blocking above
and below all wall pass-throughs, the addition of vent manufacturer supplied fire stops, wall thimbles, attic
insulation shields, interior trim collars, vent support brackets, or other components. Please check with the
authority having jurisdiction in your area when planning the venting installation to determine the specific
code requirements and exact venting components that are required for your installation.
ORION 16 Series 8900
25
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