12
FRAMING
3.4 Floor Support and Protection
FIRE HAZARD: Do NOT install this appliance directly on
carpeting, vinyl, or any other combustible material other than
wood.
• If this appliance is to be installed directly on carpeting, tile,
or other combustible material other than wood flooring,
this appliance shall be installed on a metal or wood panel
extending the full width and depth of the appliance.
• If the appliance is to be installed above floor level, a
solid, continuous platform must be constructed below the
appliance.
• Consider the height of hearth finish material (stone, brick,
etc.) when building a fireplace platform. The bottom of the
fireplace must be level with finished hearth to allow for a
proper fit of the safety barriers.
• Build the hearth to desired size and height. If a hearth
extension is desired, combustible material may be used.
3.5 Vent Termination Framing
IMPORTANT: Vent cap location must be in compliance with 6.2
Minimum Termination Clearances, on page 19.
WARNING: DO NOT RECESS THE VENT CAP INTO WALL OR
SIDING.
3.5.1 Vertical Terminations
CAUTION: Cold air transfer area. The surrounding fireplace
chase must comply with all clearances as outlined in this
manual and be constructed in compliance with local building
codes. Outside walls should be insulated to prevent cold air
from entering room.
• Follow vent pipe manufacturer’s installation instructions for
vertical terminations.
• A minimum of 1 in (25 mm) clearance on all sides of the
vertical vent pipe must be maintained.
• Attic insulation shields may be insulated using unfaced
insulation products listed as non-combustible per ASTM E
136.
3.5.2 Horizontal Terminations
IMPORTANT: Horizontal vent sections require ¼ in (6 mm) rise
for every 12 in (305 mm) of travel.
1. Measure from the floor level of the fireplace to the center of
where the vent pipe will penetrate the wall.
NOTE: Elbows listed with approved vent systems for this
appliance vary in vertical length. Please consult the vent
manufacturer’s instructions to determine the elbow dimension
used for installation. Adjust the wall pass-through rough
opening dimensions as necessary to maintain clearance
requirements.
2. Cut and frame an opening in the wall to allow the vent system
to run level through the wall thimble with the required 1 in (25
mm) clearance. These thimbles may be insulated using any
unfaced insulation products listed as non-combustible per
ASTM E 136.
3. Follow the vent pipe manufacturer’s installation instructions
for vent installation.
15
7⁄8
”
(403mm)
39”
(991mm)
Figure 3.3, Top Vent Minimum Horizontal Venting - Natural Gas and LP Gas
15
7⁄8
”
(403mm)
26”
(661mm)
Figure 3.4, Rear Vent Minimum Horizontal Venting - Natural Gas and LP Gas