www.fmiproducts.com
116240-01K
15
INSTALLATION FOR VERTICAL
TERMINATION
Note: Vertical restrictor must be installed in
all vertical installations.
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 19) to avoid
cutting load bearing members.
Note: Pay
special attention to these installation
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.
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.
Flat Ceiling Installation
1. Cut a 11
1
/
2
" square hole in ceiling using
locating hole as a center point. Opening
should be framed to 11
1
/
2
" x 11
1
/
2
" inside
dimensions, as shown in Figure 9 on page
10 using framing lumber the same size as
ceiling joists. If area above ceiling is an
insulated ceiling or an attic, nail firestop
from top side. This prevents loose insula
-
tion from falling into required clearance
space. If area above ceiling is a living
space, install firestop below framed hole.
Firestop should be installed with no less
than three nails per side (see Figure 20).
2. Assemble desired lengths of pipe and
elbows necessary to reach from fireplace
flue up through firestop. Be sure all pipe
and elbow connections are fully twist-
locked (see Figure 8, page 10).
3. Cut a hole in the roof using locating hole
as a center point. (Cover any exposed
open vent pipes before cutting hole in
roof.) The 11
1
/
2
" x 11
1
/
2
" hole must be
measured on the horizontal; actual length
may be larger depending on pitch of roof.
There must be a 1" clearance from vent
pipe to combustible materials. Frame
opening as shown in Figure 9, page 10.
4. Connect a section of pipe and extend up
through hole.
Note: If an offset is needed to avoid
obstructions, you must support vent pipe
every 3 feet. Use wall straps for this pur-
pose (see Figure 19). Whenever possible,
use 45° elbows instead of 90° elbows. A
45° elbow offers less restriction to the flow
of flue gases and intake air.
VENTING INSTALLATION
Continued
Figure 19 - Offset with Wall Strap and 45°
Elbows
45° Elbow
Wall Strap
Roof Flashing
Ceiling Firestop
Figure 20 - Installing Firestop
If area above is a living space, install
firestop below framed hole.
If area above is an attic or insulated area,
install firestop above framed hole.
