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 silicone seal-
ant to outer pipe on every 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 surfaces.
Do not pack air spaces with insu-
lation. Check pages 17-19 for the
maximum vertical rise of the fl ueing
system and the maximum horizontal
offset limitations.
will penetrate 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 fl ue will
penetrate the roof. Determine if ceiling joists,
roof rafters or other framing will obstruct the
fl ueing system. You may wish
to relocate the
appliance or to
offset, as shown
in Diagram 2
to avoid cutting
load bearing
members.
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 3 and install the fi re-
stop.
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.
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 1-1/4". Slip the fl ashing
under the shingles (shingles should overlap
half the fl ashing) as per Diagram 4.
Roof Pitch Minimum Vent Height
Feet Meters
fl at 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 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 fl ue pipe every 3 feet,
to avoid excessive stress on the el-
bows, and possible separation. 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
fl ashing until the height of the fl ue cap meets
the minimum height requirements specifi ed
in Diagram 5 or local codes. Note that for
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 fl ue
Diagram 3
Diagram 4
Diagram 5
8) Slide the appliance and fl ue assembly
towards the wall carefully inserting the fl ue
pipe into the fl ue cap assembly. It is important
that the fl ue pipe extends into the fl ue cap
suffi cient distance so as to result in a mini-
mum pipe overlap of 1-1/4 inches. Secure
the connection between the fl ue pipe and
the fl ue cap by attaching the two sheet metal
strips extending from the fl ue cap assembly
into the outer wall of the fl ue 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 (Dia-
gram 5).
INSTALLATION
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