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INSTALLATION
VERTICAL
TERMINATIONS
1) M a i n t a i n t h e 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 insulation. Check
section "Simpson Dura-
vent Flueing" for the
maximum vertical rise of
the fl ueing system and the
maximum horizontal offset
limitations.
Diagram 1
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 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
s p o t
w h e r e
t h e f l u e w i l l
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.
Note: Apply sealant "Mill-Pac" to inner
pipe and high temperature silicone
sealant to outer pipe on every twist-
lock joint.
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 restop.
18
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 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 4.
Diagram 4: The upper half of the fl ashing is
Diagram 2
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
elbows, and possible separation.
Wall straps are available for this
purpose (Diagram 2).
Diagram 3
Diagram 5
Roof Pitch
Minimum Flue 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
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 fl ue cap meets the minimum
height requirements specifi ed in Diagram 5 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 fl ue
height may solve the problem.
7) Ensure fl ue 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 fl ue passes through must be
enclosed.
Offset Chart
Regency
P36-5 Gas Log 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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