VENTING INSTALLATION
Continued
Figure 25 - Horizontal Termination Conguration for Venting Using Three 90° Elbows
(Model (V)CD36T)
TERMINATION
Note: Vertical restrictor must be installed in
all vertical installations.
1. Determine the route your vertical venting
will take. If ceiling joists, roof rafters or
other framing will obstruct the venting
system, consider an offset (see Figure 26)
to avoid cutting load bearing members.
Note: Pay special attention to these instal-
lation instructions for required clearances
(air space) to combustibles when passing
through ceilings, walls, roofs, enclosures,
attic rafters, etc. Do not pack air spaces
with insulation. Also note maximum verti-
cal rise of the venting system and any
maximum horizontal offset limitations.
When installing
the OSR58-30 offset, it must be turned
20° off center line (see Figure 27, page
18). This will give you the 1" clearance
to horizontal framing members that are a
minimum of 12" above replace.
2. Set replace in desired location. Drop a
plumb line down from ceiling to position
Figure 26 - 45° and 30° Offset with Wall
Strap
Horizontal (H
5' Min. 2' Max. 6' Max
6' Min. 3' Max. 8' Max
7' Min. 4' Max. 10' Max
8' Min. 5' Max. 12' Max
12' Min. 8' Max. 20' Max
20' Min. 8' Max. 20' Max
90°
Elbow
90°
Elbow
90°
Elbow
Roof Flashing
Wall
Strap
45°
Elbows
WS-58
Wall Strap
2 - 2 x 4
Vertical
Header
OSR58-30
30° Offset
Return
Horizontal
Frame Member
of replace exit ue. Mark center point
where vent will penetrate ceiling. Drill a
small locating hole at this point.
Drop a plumb line from inside of roof to
locating hole in ceiling. Mark center point
where vent will penetrate roof. Drill a small
locating hole at this point.
1.5"
(38 mm)
12"
(305
mm)
1" (25 mm)
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