Framing, Facing And Mantel
The construction of the framing, facing,
and mantel must be in accordance with
the standards and the following illustra-
tions (
Figure
s
7 & 8
):
A. Frame the fireplace using 2” x 3” or
heavier lumber.
B.
WARNING: Combustible
materials cannot be used in
the space directly above the
fireplace, except for the studs
above the facade that support
the facing and mantel. This
area must remain empty for
a height of 6’8” (2,032 mm)
measured from the base of the
appliance.
C. Frame the fireplace with vertical
studs at the sides of the fireplace
running from floor to ceiling (see
Figure 7
). If combustible facing is
to be used, position the studs back,
from the front edge of the fireplace
(a space that is the thickness of the
facing material, so that the facing can
be installed flush with the fireplace
facing). Frame headers between the
vertical studs only as follows:
- Place 2” x 3” or 2” x 4” head-
ers, only along the upper part of
the front, side and back faces
(some codes may require a
2” x 6 ” on an outside bearing
wall). Do not put wood or any
combustible material within the
area above the fireplace except
on the front facing.
- Place headers only as required to
support the facing and mantel.
D.
WARNING: The fireplace
must not be in contact with
any insulation or loose filling
material. Cover the insulation
with Drywall panels around the
fireplace.
COLD CLIMATE INSTALLATIONS
Climates where temperatures will fall
below 32° F (0° C).
The heating performance of the appli-
ance will vary depending upon the level
of insulation, house design, how the
appliance is operated, etc.
If this fireplace is being installed in a
cold climate, it is especially important
to seal all cracks around the fireplace
and wherever cold air could enter the
room with noncombustible material.
Also, the outside air inlet duct should
be wrapped with noncombustible in-
sulation to minimize the formation of
condensation. Do not place insulation
materials directly against the chimney
sections. We recommend that you use
the insulated wall radiation shield since
it will maintain the home’s thermal bar-
rier. AC chimney is NOT recommended
in cold climates.
Combustible materials can NOT be used in
the space directly above the fireplace. Do
not fill the space above the fireplace with any
material (Except the wood framing)
F
19-3/32”
J
20-1/2”
E
7’
Min.
2” x 3’
Min.
D
Fireplace Framing
Header
B
A
OUTSIDE CHASE
G
H
C
L*
Back Wall of Chase/Enclosure
Including Finising Materials if any
Rough Framing Face (Unfinished Shown)
* Zero Clearance From Back Spacer to Wall
Corner Installation
* Total depth is 25
inches including
the back spacer
minus 1/2 inch for
drywall to be flush
with the facing.
35-15/16"
36-1/16"
36-13/16"
12-1/4"
22-19/32"
28-3/32"
1-1/2"
24"
12-1/2"
9-1/4"
10-1/4"
1"
22-1/2"
24"
17-11/16"
3-9/16"
14-5/32"
14-3/8"
9-7/8"
7-11/16"
2-13/16"
17-3/4"
Figure 7 - Framing Dimensions
Notes
Due to Lennox' ongoing commit-
ment to quality, all specifications,
ratings and dimensions are subject
to change without notice.
All framing dimensions calculated
for 1/2" dry wall at the fireplace
face. If sheathing the chase or
finishing with other thickness
materials, calculations will need
to be made.
* The fireplace must not be in
contact with any insulation or loose
filling material. Cover the insulation
with Drywall panels around the
fireplace.
FRAMING DIMENSIONS
Fireplace Opening Width
A
36-3/8”
924 mm
B
37”
940 mm
C
30-1/8”
765 mm
D
13-1/2”
343 mm
E
77”
1956 mm
F
38-1/2”
978 mm
G
*24-1/2”
603 mm
H
23-1/2”
597 mm
J
54-7/16”
1383 mm
K
8”
203 mm
L
1”
25 mm
K
Combustion
Air Kit
8
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
