14
FRAMING
Hussong Mfg. Co., Inc. • Kozy Heat Fireplaces
#BAY-41-G R.9 Sept 2018
3.5 Vent Termination Framing
IMPORTANT: Vent cap location must be in compliance with Section 6.2
Minimum Termination Clearances on page 24.
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.
•
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 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.
NOTE: Wall thimble products that comply with the required 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.
•
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 1-1/2 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, Natural Gas and Propane - 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, Natural Gas - 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, Propane - 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
Table 3.5, Natural Gas and Propane- 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
W
H
A
B
Figure 3.4, Horizontal Vent Terminations
