www.fmiproducts.com
54010F
5
FIREPLACE INSTALLATION
Continued
5. Before securing fireplace to prepared
framing, ember protector (provided) must
be placed between hearth extension (not
supplied) and under bottom front edge
of fireplace to protect against glowing
embers falling through. If fireplace is to
be installed on a raised platform, a Z-type
ember protector (not supplied) must be
fabricated to fit your required platform
height. Ember protector should extend
under fireplace a minimum of 1". Ember
protector should be made of galvanized
sheet metal (28 gauge minimum) to pre-
vent corrosion (see Figure 5).
6. Using screws or nails, secure fireplace to
the framing through flanges located on
sides of the fireplace (see Figure 4).
Figure 5 - Hearth Extensions
Figure 4 - Nailing Flanges
HEARTH EXTENSION
A hearth extension is required to protect com-
bustible floor constructed in front of fireplace.
The hearth extension is not included and must
be fabricated, The hearth extension must
project at lease 12" one side and 20" on other
side of fireplace opening.
Hearth extension must be made of noncom-
bustible, inorganic material having an effective
thermal conductivity of K=0.84 BTU IN/FT,
HR. F (or less) at 1" thick.
Thermal conductivity "K" of materials can
be obtained from manufacturer or supplier
of noncombustible material. The minimum
required thickness ofr any material could be
obtained by the following formula:
K factor at 1" = thickness required
0.84
For example, if the material selected has a K
factor of 0.25, such as glass fiber, the following
formula would apply:
0.25 x 1.0" = 0.30" thickness required
0.84
If hearth extension is to be covered, use non-
combustible material such as tile, slate, brick,
concrete, metal, glass, marble, stone, etc.
Provide a means to prevent hearth extension
from shifting and seal gap between fireplace
frame and hearth extension with non-combus-
tible material (see Figure 5).
WARNING: Hearth extension is
to be installed only as described.
MANTEL CLEARANCES
Woodwork such as wood trims, mantels or
any other combustible material must not be
placed at least 9" above opening of fireplace
(see Figure 6, page 6).
Combustible materials above 9" and projecting
more than 1
1
/
2
" from the fireplace front face
must not be at least 12" above fireplace opening
(NFPA STD 211, Sec. 7-3.3.3).
Mantels or any other combustible material
may also come up to the side edge of the
black metal face of the fireplace. Clearances
from side of fireplace to any combustible
material and wall should fall within the limits
show in Figure 7, page 6.
Nailing
Flange
Nail or
Screw
Seal Cap
Do Not Block Louver
Seal Cap
Ember
Protector
Ember Protector
Hearth
Extension
Hearth
Extension
