www.fmiproducts.com
56131L
17
VENTING INSTALLATION
Continued
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
vertical rise of venting system and any
maximum horizontal offset limitations.
Offsets must fall within parameters shown
in Figure 25.
2. Set fireplace in desired location. Drop a
plumb line down from ceiling to position
of fireplace exit flue. 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.
X
12
Roof Pitch is
x 12 Listed
Clearance
8'
Minimum
Listed
Vent Cap
Lowest
Discharge
Opening
Listed
Gas
Vent
H (Min.) Height from Roof
Figure 25 - Vertical Vent Termination
Clearance
ROOF PITCH
H (Min.)
Flat to 6/12
1.0'
6/12 to 7/12
1.25'
Over 7/12 to 8/12
1.5'
Over 8/12 to 9/12
2.0'
Over 9/12 to 10/12
2.5'
Over 10/12 to 11/12
3.25'
Over 11/12 to 12/12
4.0'
Over 12/12 to 14/12
5.0'
Over 14/12 to 16/12
6.0'
Over 16/12 to 18/12
7.0'
Over 18/12 to 20/12
7.5'
Over 20/12 to 21/12
8.0'
Venting with Two 90° Elbows
Vertical (V)
Horizontal (H1) +
Horizontal (H2)
5' min.
4' max.
6' min.
8' max.
7' min.
10' max.
8' min.
15' max.
20' max.
20' max.
Figure 23 - Horizontal Termination
Configuration for Rigid Venting Using
Two 90° Elbows with Termination at 90°
with Fireplace
INSTALLATION FOR VERTICAL
TERMINATION
NOTICE: Use rigid pipe only. Flex
venting is not to be used with a
vertical termination.
1. Determine route your vertical venting
will take. If ceiling joists, roof rafters, or
other framing will obstruct venting system,
consider an offset (see Figure 24) to avoid
cutting load bearing members.
Figure 24 - Vertical Cent Pipe Offsets
Plumber’s
Tape
Connected
to Wall
Strap
Wall
Strap
Firestop
(2) 45°
Elbows
Firestop
(2) 45°
Elbows
Roof
Flashing
45° Starter
Elbow
