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UNIT INSTALLATION
WITH VERTICAL
TERMINATION
4" X 6-5/8" VENTING
(Rigid Vent Systems)
1) Maintain the 1-1/2" clearances (air spaces)
to combustibles when passing through
ceilings, walls, roofs, enclosures, attic rafter,
or other nearby combustible surfaces. Do not
pack air spaces with insulation.
Check "Venting" Sections for
the maximum vertical rise of the
venting system and the maximum
horizontal offset limitations.
2) Set the gas appliance in its
desired location. Drop a plumb
bob down from the ceiling to the
position of the appliance fl ue
exit, and mark the location where
the vent will penetrate the
ceiling. Drill a small hole
at this point. Next, drop a
plumb bob from the roof to
the hole previously drilled
in the ceiling, and mark the
spot where the vent will penetrate the roof.
3) A Firestop spacer must be installed in the
fl oor or ceiling of every level. To install the
Firestop spacer in a fl at ceiling or wall, cut
a 10 inch square hole. Frame the hole as
shown in Diagram 2 and install the fi restop.
Note: All vertical terminations are
vented using 4" x 6-5/8" venting and
rigid pipe adaptor #510-994.
Diagram 2
HZ42ST Regency Horizon
TM
Gas Fireplace
4) Assemble the desired lengths of pipe and
elbows. Ensure that all pipes and elbow con-
nections are in the fully twist-locked position
and sealed.
NOTE: For best results and optimum perform-
ance with each approved venting system, it
is highly recommended to apply "Mill-Pac"
sealant (supplied) to every inner pipe connec-
tion. 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 centered 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 1-1/2". Slip the fl ashing
under the shingles (shingles should overlap
half the fl ashing) as per Diagram 3.
Diagram 1
Diagram 3: 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.
Galvanized pipe is desirable above the roofl ine
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 Dia. 4 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.
INSTALLATION
Diagram 4
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-
locking it.
Note: Any closets or storage spaces, which
the vent passes through 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
29
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