FRAMING
15
3.7 Vent Termination Framing
IMPORTANT: Vent cap location must be in compliance with
Section 7.2 Minimum Termination Clearances on page 25.
WARNING: DO NOT RECESS THE VENT CAP INTO WALL OR
SIDING.
3.7.1 Vertical Terminations
CAUTION: Cold air transfer area. The surround 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.
3.7.2 Horizontal Terminations
IMPORTANT: Horizontal vent sections require 1/4 in (6 mm) rise
for every 12 in (305 mm) of travel.
NOTE: Wall thimble products that comply with the required 1
in (25 mm) clearance to combustibles must be installed for all
horizontal vent runs that pass through interior or exterior walls.
These wall thimble products may be insulated using unfaced
insulation products listed as noncombustible per ASTM E 136.
1. Measure from floor level of the fireplace to the center of
where the vent pipe will penetrate the wall. 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 pass-through.
3. Follow the vent pipe manufacturer’s installation instructions
for vent installation.
Figure 3.6, Minimum Horizontal Termination Framing
19”
(483mm)
35
5⁄8
”
(905mm)
47
5⁄8
”
(1210mm)
43”
(1092mm)
19”
(483mm)
19”
(483mm)
MINIMUM HORIZONTAL RIGID VENT PIPE TERMINATION
NATURAL GAS AND LP GAS
MINIMUM HORIZONTAL RIGID VENT PIPE TERMINATION
LP GAS
MINIMUM HORIZONTAL FLEX VENT PIPE TERMINATION
NATURAL GAS AND LP GAS
