8
www.desatech.com
116238-01C
(Framing
Detail)
10
3
/
4
"
(273 mm)
10
3
/
4
" Inside Framing
(273 mm)
10
3
/
4
"
(273 mm)
8
1
/
2
"
(216 mm)
Vent Opening
Combustible Wall
Vent Opening
Noncombustible Wall
INSTALLATION PLANNING
There are two basic types of direct-vent installation:
• Horizontal Termination
• Vertical Termination
Horizontal Termination Installation
IMPORTANT:
Horizontal square terminations require only in-
ner portion of wall firestop. Horizontal installations using round
termination require exterior portion of wall firestop (see Figure
14, page 10).
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 installations require
sliding the fireplace in and out of position to make final vent-
ing connections. Figures 14 through 18 on pages 10 through
12 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 connections.
Twist-Lock Procedure:
The female ends of the pipes have
locking lugs (indentations). These lugs will slide straight into
matching slots on the male ends of adjacent pipes. Push pipe
sections together and twist one section clockwise approxi-
mately 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.
IMPORTANT:
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 vent pipe. Mark the
wall for a 10
3
/
4
" x 10
3
/
4
" 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).
VENTING INSTALLATION
INSTRUCTIONS
Continued
VENTING INSTALLATION INSTRUCTIONS
Installation Planning
Figure 8 - Vent Pipe Connections
Figure 9 - Vent Opening Requirements
Center
of Hole
Female
Locking
Lugs
Male
Slots
