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INSTALLATION
UNIT INSTALLATION
WITH VERTICAL
TERMINATION
(Rigid Vent Systems)
Note: A clearance of 2"(51mm) must be
maintained; except when passing
through a wall, ceiling, or at the
termination where the use of a fi restop
or wall thimble reduces the required
clearance to 1-1/2" (38mm). We
recommend framing a 11"(279mm) x
11"(279mm) (inside dimensions) hole
to give structural rigidity for mounting
the termination.
1) Maintain the 2" (51mm)
clearances (air spaces)
t o c o m b u s t i b l e s w h e n
passing through ceilings,
walls, roofs, enclosures,
attic rafter, or other nearby
combustible surfaces.
Do not pack air spaces
with insulation. Check
" Ve n t i n g A r r a n g e m n t
- Vertical Termination"
s e c t i o n
f o r
t h e
m a x i m u m 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
his point. Next, drop
a plumb bob from
the roof to the hole
previously drilled in
the ceiling, and mark
the spot where the
Diagram 2
vent will penetrate the roof. Determine if ceiling
joists, roof rafters or other framing will obstruct
the venting 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.
Diagram 3
24
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.
Note: For best results and optimum
performance 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"(38mm). Slip the fl ashing
under the shingles (shingles should overlap
half the fl ashing) as per Diagram 4.
Diagram 1
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 vent pipe every 3
feet (0.9 meter), to avoid excessive
stress on the elbows, and possible
separation. Wall straps are available
for this purpose
(Diagram 2).
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 Diagram 5 or
local codes. Note that for steep roof pitches,
the vertical height must be increased.
Diagram 5
Minimum Vent
Roof Pitch
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
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.
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.
Offset Chart
Regency
®
L676E Direct Vent Gas Fireplace
Meters
0.61
0.61
0.61
0.76
0.99
1.22
1.52
1.83
2.13
2.29
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