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UNIT INSTALLATION WITH VERTI-
CAL TERMINATION
4" X 6-5/8" 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 when using the fire-
stop spacer/wall thimble 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 flue exit, and mark
the location 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 previ-
ously drilled in the ceiling,
and mark the spot where
the vent will penetrate the
roof.
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 2 and
install the firestop.
Note: All vertical terminations are vented
using 4" x 6-5/8" venting and rigid pipe
adaptor #510-994.
Diagram 2
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 perfor-
mance 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.
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 combustibles . Slip
the flashing under the shingles (shingles should
overlap half the flashing) as per Diagram 3.
6. Continue to assemble pipe lengths.
Diagram 1
Diagram 3: 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.
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 roofline
due to its higher corrosion resistance. Continue
to add pipe sections through the flashing until the
height of the vent cap meets the minimum height
requirements specified 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.
Diagram 4
Roof Pitch
flat to 7/12
over 7/12 to 8/12
over 8/12 to 9/12
over 9/12 to 10/12
over 10/12 to 11/12
over 11/12 to 12/12
over 12/12 to 14/12
over 14/12 to 16/12
over 16/12 to 18/12
over 18/12 to 20/12
over 20/12 to 21/12
7. Ensure vent is vertical and secure the base of
the flashing to the roof with roofing 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 Ultimate ™ U900E-11 Gas Fireplace
installation
Minimum Vent Height
Feet
Meters
2
0.61
2
0.61
2
0.61
2.5
0.76
3.25
0.99
4
1.22
5
1.52
6
1.83
7
2.13
7.5
2.29
8
2.44
|
41
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