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INSTALLATION
4) Assemble the desired lengths of black pipe
and elbows necessary to reach from the
appliance adapter up though the Round
Support Box. Insure that all pipes and elbow
connections are in the fully twist-locked posi-
tion and sealed.
Diagram 8
5) Cut a hole in the roof centred on the small
drilled hole placed in the roof in Step 2. The
hole should be of suffi cient size to meet
the minimum requirements for clearance
to combustibles of 1-1/4". Slip the fl ashing
under the shingles (shingles should overlap
half the fl ashing) as per diagram 10.
Diagram 9
6) Continue to assemble pipe lengths.
Note: If an offset is necessary in the attic
to avoid obstructions, it is important
to support the fl ue pipe every 3 feet,
to avoid excessive stress on the el-
bows, and possible separation. Wall
straps are available for this purpose.
See diagram 5.
Hint: Apply the
sealant (Mill-Pac
and/or high tem-
perature silicone)
to the outer pipe
before connect-
ing the inner
pipe.
Galvanized pipe and elbows may be utilized
in the attic as well as above the roofl ine.
The galvanized fi nish is desirable above the
roofl ine due to its higher corrosion resist-
ance.
18
Diagram 10: The upper half of the fl ashing is
installed under the roofi ng material and not
nailed down until the chimney is installed.
This allows for small adjustments.
Continue to add pipe sections through the
fl ashing until the height of the fl ue cap meets
the minimum height requirements specifi ed
in diagram 11 or local codes. Note that for
steep roof pitches, the vertical height must
be increased. A poor draft, or down drafting
can result from high wind conditions near
big trees or adjoining roof lines, in these
cases, increasing the fl ue height may solve
the problem.
Diagram 11
Roof Pitch
Minimum Flue Height
Feet
fl at to 7/12
2
over 7/12 to 8/12
2
over 8/12 to 9/12
2
over 9/12 to 10/12
2.5
over 10/12 to 11/12
3.25
over 11/12 to 12/12
4
over 12/12 to 14/12
5
over 14/12 to 16/12
6
over 16/12 to 18/12
7
over 18/12 to 20/12
7.5
over 20/12 to 21/12
8
7) Ensure fl ue is vertical and secure the base
of the fl ashing to the roof with roofi ng rails,
slide storm collar over the pipe section and
seal with a mastic.
8) Install the vertical termination cap by twist
locking it.
Notes:
a) For multistorey vertical installations, a
Ceiling Fire stop (Part # 963) is required
at the second fl oor, and any subsequent
fl oor. Diagram 12. The opening should
be framed to 254mm x 254mm inside
dimensions, in the same manner as
shown in diagram 9.
b) Any occupied areas above the fi rst fl oor,
including closets and storage spaces,
through which the vertical fl ue passes,
must be enclosed.
32mm
Meters
0.61
0.61
0.61
Diagram 12
0.76
0.99
OFFSET CHART
1.22
1.52
1.83
2.13
2.29
2.44
Hampton HG35-1 Direct Vent Freestanding Gas Stove
32mm
32mm
32mm
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