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Regency P121/P121LC/P121RC/P131 Zero Clearance Room Sealed Gas Fireplace
20
Diagram 3
Diagram 5
Diagram 1
Diagram 2
Note: Apply sealant "Mill-Pac" to inner
pipe and high temperature sili-
cone sealant to outer pipe on eve-
ry twist-lock joint.
VERTICAL
TERMINATION
1) Maintain the 1-1/4" clearances (air
spaces) to combustibles when
passing through ceilings, walls,
roofs, enclosures, attic rafter, or
other nearby combustible surfac-
es. Do not pack air spaces with
insulation. Check pages 17-19 for
the maximum vertical rise of the
flueing system and the maximum
horizontal offset limitations.
trate the ceiling. Drill a small hole at his point.
Next, drop a plumb bob from the roof to the
hole previously drilled in the ceiling, and
mark the spot where the flue will penetrate
the roof. Determine if ceiling joists, roof
rafters or other framing will
obstruct the flueing system.
You may wish
to relocate the
appliance or to
offset, as
shown in Dia-
gram 2 to avoid
cutting load
bearing mem-
bers.
3) A Firestop spacer must be installed in the
floor or ceiling of every level. To install the
Firestop spacer in a flat ceiling or wall, cut
a 10 inch square hole. Frame the hole as
shown in Diagram 3 and install the firestop.
4) Assemble the desired lengths of pipe and
elbows. Ensure that all pipes and elbow
connections are in the fully twist-locked
position and sealed.
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 sufficient size to meet the
minimum requirements for clearance to com-
bustibles of 1-1/4". Slip the flashing under
the shingles (shingles should overlap half
the flashing) as per Diagram 4.
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 4: 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.
6) Continue to assemble pipe lengths.
Note: If an offset is necessary in the attic
to avoid obstructions, it is impor-
tant to support the flue pipe every
3 feet, to avoid excessive stress
on the elbows, and possible sep-
aration. Wall straps are available
for this purpose (Diagram 2).
Galvanized pipe is desirable above the roof-
line due to its higher corrosion resistance.
Continue to add pipe sections through the
flashing until the height of the flue cap meets
the minimum height requirements specified in
Diagram 5 or local codes. Note that for steep
2) Set the gas appliance in
its desired location. Drop
a plumb bob down from
the ceiling to the position
of the appliance flue exit,
and mark the location
where the flue will pene-
Diagram 3
Diagram 4
Diagram 5
to ensure that the termination is
not recessed into the siding.
7) Before connecting the horizontal run of flue
pipe to the flue termination, slide the Wall
Thimble (Part # 942) over the flue pipe.
8) Slide the appliance and flue assembly to-
wards the wall carefully inserting the flue
pipe into the flue cap assembly. It is impor-
tant that the flue pipe extends into the flue
cap sufficient distance so as to result in a
minimum pipe overlap of 1-1/4 inches. Se-
cure the connection between the flue pipe
and the flue cap by attaching the two sheet
metal strips extending from the flue cap
assembly into the outer wall of the flue pipe.
Use the two sheet metal screws provided
to connect the strips to the pipe section. See
Diagram 4.
9) Install wall thimble in the center of the 10"
square and attach with wood screws (Di-
agram 5).
INSTALLATION