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116647-01H
11
INSTALLATION PLANNING
There are two basic types of direct-vent
installation:
• Horizontal Termination
• Vertical Termination
Horizontal Termination Installation
IMPORTANT:
Horizontal square terminations
require only inner portion of wall firestop. Hori
-
zontal installations using round termination
require exterior portion of wall firestop (see
Figure 14, page 13).
1. Set the fireplace in its desired location and
determine the route your horizontal venting
will take. Do not secure the fireplace until
all venting has been installed. Some instal-
lations require sliding the fireplace in and
out of position to make final venting con
-
nections. Figures 14 through 18 on pages
13 through 15 show different configurations
for venting with horizontal termination that
will help you decide which application best
suits your installation. Check to see if wall
studs or roof rafters are in the path of your
desired venting route. If they are, you may
want to adjust the location of the fireplace.
2. Direct vent pipe sections and components
are designed with special twist-lock con-
nections.
Twist-Lock Procedure:
The female ends
of the pipes have locking lugs (inden
-
tations). These lugs will slide straight
into matching slots on the male ends
of adjacent pipes. Push pipe sections
together and twist one section clockwise
approximately one-quarter turn until the
sections are fully locked (see Figure 8).
Note:
Horizontal runs of vent must be
supported every three feet. Use wall
straps for this purpose.
3. Use a 45° elbow to connect venting
system to fireplace flue collar. The elbow
is designed to be twist-locked onto the
flue collar as described in step 2.
IM-
PORTANT:
Do not attempt to alter the
configuration of the elbow by cutting,
twisting, bending, etc.
4. Assemble the desired combination of pipe
and elbows to the fireplace flue collar. If
there are long portions of venting run, pre-
assembled pipe sections may be installed
as subassemblies for convenience.
5. Carefully determine the location where
the vent pipe assembly will penetrate the
outside wall. The center of the hole should
line up with the center-line of the horizontal
VENTING INSTALLATION INSTRUCTIONS
Continued
vent pipe. Mark the wall for a 11
1
/
2
" x 11
1
/
2
" square hole. Cut and frame the square
hole in the exterior wall where the vent will
be terminated. If the wall being penetrated
is constructed of noncombustible material,
such as masonry block or concrete, a 8
1
/
2
"
hole with zero clearance is acceptable (see
Figure 9).
WARNING: Do not recess
vent termination into any wall.
This will cause a fire hazard.
Figure 8 - Vent Pipe Connections
Female
Locking Lugs
Male
Slots
(Framing
Detail)
11
1
/
2
"
11
1
/
2
" Inside Framing
11
1
/
2
"
8
1
/
2
"
Vent Opening
Combustible Wall
Vent Opening
Noncombustible Wall
Figure 9 - Vent Opening Requirements
Center
of Hole
