Framing, Facing And Mantel; Hearth Extension Requirements - Lennox Hearth Products Villa Vista Installation & Operation Manual

Framing, Facing and Mantel

The construction of the framing, facing, and
mantel must be in accordance with the standards
and the following illustrations:
(see Figures 10B. 11, 13, 14 and 15):
1. Frame the fireplace using 2 x 3 or heavier
lumber.
2. WARNING: Combustible materials cannot
be used in the space directly above the
fireplace (except for framing on the front
facing). This area must remain empty for
a height of 6'8" (2032 mm) measured
from the base of the appliance.
3. Frame the fireplace with vertical studs at
the sides of the fireplace running from
floor to ceiling (see Figure 10).
If combustible facing is to be used, posi-
tion the studs back, from the front edge
of the fireplace, a space 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 headers, only
along the upper part of the front,
side and back faces. 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.
The fireplace cannot be in contact with the
house insulation material. Cover the insula-
tion with drywall panels or any rigid material
around the fireplace.

Hearth Extension Requirements

The Villa Vista™ fireplace may be installed
directly on a combustible floor. The supplied
safety metal strip must be positioned as fol-
lows: One half under the front of the fireplace
and the other half must extend on the floor
over which the hearth extension will be built
(see Figure 10A).
* The safety metal strip must cover the entire
width of the fireplace
The combustible floor in front of the fireplace
must be covered with a non-combustible mate-
rial (tile, marble, stone, etc). See Figure 10B.
COLD CLIMATE INSTALLATIONS
Climates where temperatures will fall below
32° F (0° C).
The heating performance of the appliance 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.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Fireplace
The crack between the fireplace
and the hearth extension must be
sealed with a non-combustible
material such as sand-cement
grout.
Elevated Fireplaces
u
Elevated fireplace installations
require a special "Z" Metal
Safety Strips (field provided),
in place of the safety metal strip
shown above. The safety strip
should extend the full width of
the fireplace. When more than
one safety strip is used they must
overlap by a minimum of 1".
Figure 10A - Hearth Extension Requirements
Figure 10B
Also, the outside air inlet duct should be wrapped with noncombustible insulation 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 barrier. AC chimney is NOT recommended in very cold climates (in areas with
temperatures below 0° F (-18° C).
Safety Metal Strip
Floor
Platform
2"
Mantel
24"
54"
Hearth 4"
Extension
18"
WARNING: THE HEARTH ExTEN-
SION IS TO BE INSTALLED ONLY
AS ILLUSTRATED.
Hearth Extension
Non-Combustible
Finish Material
1/2"
13mm
Fireplace
u
Area Where Wood
Mantel Can Be Install
45 o
17"
38"
Non combustible material
9