Hampton
®
H27E-11 Direct Vent Freestanding Gas Stove | 33
installation
Offset Chart
Diagram 12
7) Ensure vent is vertical and secure the base
of the flashing to the roof with roofing 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 is required at the
second oor, and any subsequent oor.
Diagram 12. The opening should be
framed to 10 " x 10" inside dimensions,
in the same manner as shown in diagram
9.
b) Any occupied areas above the rst oor,
including closets and storage spaces,
through which the vertical vent passes,
must be enclosed.
Diagram 11
Roof Pitch Minimum Vent Height
Feet Meters
flat to 7/12 2 0.61
over 7/12 to 8/12 2 0.61
over 8/12 to 9/12 2 0.61
over 9/12 to 10/12 2.5 0.76
over 10/12 to 11/12 3.25 0.99
over 11/12 to 12/12 4 1.22
over 12/12 to 14/12 5 1.52
over 14/12 to 16/12 6 1.83
over 16/12 to 18/12 7 2.13
over 18/12 to 20/12 7.5 2.29
over 20/12 to 21/12 8 2.44
Diagram 8
3) To install the Round Support Box/Wall Thim-
ble in a flat ceiling, cut a 10 inch square hole
in the ceiling centred on the hole drilled in
Step 2. Frame the hole as shown in diagram
9.
NOTE: For best results and optimum
performance with each approved
venting system, it is highly rec-
ommended to apply “Mill-Pac”
sealant (supplied) to every in-
ner pipe connection. Failure to
do so may result in drafting or
performance issues not covered
under warranty.
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
position and sealed.
Diagram 10: The upper half of the flashing is
installed under the roofing material and not
nailed down until the chimney is installed.
This allows for small adjustments.
Note: If an offset is necessary in the
attic to avoid obstructions, it is
important to support the vent pipe
every 3 feet, to avoid excessive
stress on the elbows, and pos-
sible separation. Wall straps are
available for this purpose. See
diagram 5.
Galvanized pipe and elbows may be utilized
in the attic as well as above the roofline.
The galvanized finish is desirable above the
roofline due to its higher corrosion resistance.
Continue to add pipe sections through the
flashing until the height of the vent cap meets
the minimum height requirements specified
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 vent height may solve the
problem.
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 sufficient size to meet
the minimum requirements for clearance
to combustibles of 1-1/4". Slip the flashing
under the shingles (shingles should overlap
half the flashing) as per diagram 10.
6) Continue to assemble pipe lengths.
Diagram 9
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