HAMPTON BAY Hampton H35-NG2 Owners & Installation Manual page 26

INSTALLATION
Diagram 8
3) To install the Round Support Box/Wall Thimble
in a fl at 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.
Diagram 9
4) Assemble the desired lengths of black pipe and
elbows necessary to reach from the appliance
adaptor up though the Round Support Box.
Insure that all pipes and elbow connections
are in the fully twist-locked position and sealed.
NOTE: For best results and optimum per-
formance with each approved venting
system, it is highly recommended to
apply "Mill-Pac" sealant (supplied) to
every inner pipe connection. Failure
to do so may result in drafting or
performance issues not covered
under warranty. Silicone (red RTV)
is optional.
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.
26
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.
6) Continue to assemble pipe lengths.
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 possible 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 roof line. The
galvanized fi nish is desirable above the roof
line due to its higher corrosion resistance.
Continue to add pipe sections through the
fl ashing until the height of the vent 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 vent height may solve the problem.
Diagram 11
Roof Pitch Minimum Vent 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 vent 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 lock-
ing it.
Notes:
a) For multistorey vertical installations, a Ceil-
ing Fire stop (Part # 46DVA-FS) is required
at the second fl oor, and any subsequent
fl 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 fi rst fl oor,
including closets and storage spaces,
through which the vertical vent passes,
must be enclosed.
Meters
0.61
0.61
0.61
0.76
0.99
1.22
1.52
1.83
2.13
2.29
2.44
Hampton® H35-2 Direct Vent Freestanding Gas Stove
Diagram 12
Offset Chart