Astria.US.com
126733-01B
11
VENTING INSTALLATION
Continued
5.
Noncombustible Exterior Wall:
Position horizontal vent cap in center of
the 8
1
/
2
" round hole and attach to exterior wall with four wood screws
provided. Before attaching vent cap to exterior wall, run a bead of non-
hardening mastic (pliable sealant) around outside edges to make a seal
between it and outside wall.
Note: Four wood screws provided should be replaced with appropriate
fasteners for stucco, brick, concrete or other types of sidings (see Figure
11).
Combustible Exterior Wall:
For vinyl siding, stucco or wood exteriors,
a siding standoff may be installed between vent cap and exterior wall.
Siding standoff prevents excessive heat from damaging siding materi-
als. Siding material must be cut to accommodate standoff. Bolt vent
cap to standoff. Apply non-hardening mastic around outside edge of
standoff. Position standoff/cap assembly in the center of 11
1
/
2
" square
hole and attach to exterior wall with provided wood screws (see Figure
12, page 12). Siding standoff must sit flush against exterior fascia
material.
6. Connecting Vent Cap with Horizontal Vent Pipe: Slide wall firestop over
vent pipe before connecting horizontal run to vent cap (see Figure 13,
page 12).
Carefully move fireplace, with vent assembly attached, toward wall and
insert vent pipe into horizontal termination. Pipe overlap should be a
minimum of 1
1
/
4
" (see Figure 14, page 12).
Slide wall firestop against interior wall surface and attach with screws
provided. See Figure 14, for horizontal termination details.
Place fireplace into position and shim with noncombustible material if
needed. Nail or screw side flanges to framing to secure unit in place.
IMPORTANT:
Make sure fireplace is level before securing. If fireplace is
not level it will not work properly.
Figure 9 - Vent Pipe Connections
Figure 10 - Vent Opening Requirements
Figure 11 - Installing Horizontal Vent Cap
(Noncombustible Exterior)
Female
Locking Lugs
Male
Slots
Center of
Hole
(Framing
Detail)
11
1
/
2
"
11
1
/
2
" Inside Framing
11
1
/
2
"
8
1
/
2
"
Vent Opening
Combustible Wall
Vent Opening
Noncombustible Wall
Wood
Screw
Vent Cap
Apply
Mastic to All
Four Sides
