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A 1 inch (25 mm) clearance to combustibles must be maintained
around any vertical vent pipe. Around a horizontal vent pipe, the
clearance to combustibles should be 2 inches (50 mm) for rigid &
3 inches (86 mm) for ex above, and 1 inches (38 mm) on the
sides and bottom. When combustible materials are directly above
a 90° elbow & above the unit, 8 inches (203 mm) of clearance are
necessary; when not the elbow is not above the unit, 3 inches (76
mm) for rigid pipe & 3 inches (86 mm) for ex pipe. A 10 inches
(250 mm) x 10 inches (250 mm) frame (see Figure 35) will assure
the proper support and spacing for a vent pipe through the ceiling
or as it passes through the wall [up to 8 inches (203mm) for ex
pipe]. Installations in Canada require that a wall thimble be used for
passing through walls and ceilings. All sealing and vapour barriers
must comply with local building codes.
When planning an installation, it is necessary to select the
proper length of vent pipe for the particular requirements. The
conguration of the venting pipes depends on the locations of walls,
ceilings and studs. However, the pipes cannot be of arbitrary length
and arrangement. Because the length of the vertical and horizontal
sections dramatically affects the burning efciency of the replace,
Figure 35. Vent Framing Through the Wall or
Ceiling.
Figure 34. Vent Pipe Clearances.
Initial Installation
QUALIFIED INSTALLERS ONLY
Table 7. Vent Pipe Minimum Clearances.
Vertical Pipe
to the Side
Walls
Horizontal Pipe
to the Sides &
Bottom
Above an
Elbow Above
the Unit
Above an Elbow
Not Above the
Unit
Above
Horizontal Vent
Pipe
Wall Frame
8”(203mm) or
less
Hard
Pipe
1”
(25.4 mm)
1”
(38.1 mm)
8”
(203 mm)
3”
(76.2 mm)
2”
(51 mm)
10”x10”
(25x25cm)
Flex
Pipe
1”
(25.4 mm)
1”
(38.1 mm)
8”
(203 mm)
3 ”
(86 mm)
3 ”
(86 mm)
10”x10”
(25x25cm)
2" (51mm)
8" (203mm)
46 ” (1175mm)
to a hard pipe
49 ” (1257mm)
to a flex pipe
Wall
Thimble
Framing
Joists/Studs
10”
10”
VENTING:
This replace has been tested and certied for use with SIMPSON DURAVENT DIRECT VENT TYPE “GS”
PIPE FOR GAS STOVES, SECURITY CHIMNEY’S SECURE VENT DIRECT VENT SYSTEM kits, AMERICAN
METAL PRODUCTS AMERIVENT DIRECT and DIRECT-TEMP SELKIRK METALBESTOS.
certain guidelines
have been set in
INITIAL INSTALLATION
- VENT CONFIGURA-
TIONS AND RESTRIC-
TOR SETTINGS.
Venting terminals cannot be recessed into a wall or
siding.