14
FRAMING
3.5 Vent Termination Framing
IMPORTANT: Vent cap location must be in compliance with
Section 7.2 Minimum Termination Clearances on page 23.
WARNING: DO NOT RECESS THE VENT CAP INTO WALL OR
SIDING.
3.5.1 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.
3.5.2 Horizontal Terminations
IMPORTANT: Horizontal vent sections require 1/4 in (6 mm) rise
for every 12 in (305 mm) of travel.
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.
• Follow vent pipe manufacturer’s installation instructions for
vent installation.
• Flex pipe vent systems require a minimum of 1 in (25 mm)
clearance from the top, sides, and bottom surfaces of
horizontal pipe.
• Rigid pipe vent systems require a minimum of 1½ in (38 mm)
from the top surface of horizontal pipe, and 1 in (25 mm)
from the sides and bottom surfaces of horizontal pipe.
• Refer to Table 3.2, Table 3.3, Table 3.4, Table 3.5, and Figure
3.4 for horizontal vent framing.
Table 3.2, NG & LPG - Rear Vent Minimum Horizontal Venting
Vent Pipe Top (A)
Framed Opening Top (B)
31-5/8 in
803 mm
33-1/8 in
842 mm
Table 3.3, NG - Top Vent Minimum Horizontal Venting
Vertical Venting
90° Elbow
Vent Pipe Top (A)
Framed Opening
Top (B)
Rigid Vent System
45 in
1143 mm
46-1/2 in
1181 mm
Flex Vent System
49 in
1245 mm
50 in
1270 mm
Table 3.4, LPG - Top Vent Minimum Horizontal Venting
Minimum Vertical
Rise
9 in (229 mm)
Vent Pipe Top (A)
Framed Opening
Top (B)
Rigid Vent System
52-1/2 in
1333 mm
54 in
1372 mm
Flex Vent System
52-1/2 in
1333 mm
53-1/2 in
1359 mm
W
H
A
B
Figure 3.4, Horizontal Vent Terminations
Table 3.5, NG & LPG - Top Vent Minimum Horizontal Venting
Minimum Vertical
Rise
15 in (381 mm)
Vent Pipe Top (A)
Framed Opening
Top (B)
Rigid Vent System
57 in
1448 mm
58-1/2 in
1486 mm
Flex Vent System
57 in
1448 mm
58 in
1473 mm
