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INSTALLATION
UNIT INSTALLATION
WITH VERTICAL
TERMINATION
(
4" X 6-5/8"
102MM X 175MM)
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 lo-
cation 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
26
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 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 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
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.
adjustments.
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.
Regency GF900C Gas Fireplace
Meters
0.61
0.61
0.61
0.76
0.99
1.22
1.52
1.83
2.13
2.29
2.44
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