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4/12
Heatilator • Constitution EPA Fireplace • 480-1091H
Page 57
3. Fireplace is installed ush on the oor and Hearth
Extension is raised to the bottom of the fascia:
Raised hearth must be constructed of non-combustible
materials such as cement block or equivalent material. Non-
combustible ooring on the raised hearth must be 20 in. (508
mm) in front of and 8 in. (203 mm) to either side of the fuel
opening with a minimum thickness of 1 in. (25 mm) and (“k”
value = 0.49). See Figure 10.11.
Fascia
Outer Can
Flange
Ember Strip (Seal gap with
High temp, noncombustible
sealant able to withstand
300°)
Tile or
Marble
Minimum 4 in. (101.6 mm) Cement Board or
equivalent, (or two 1/2 in. pieces)
and "k" value = 0.49. Micore 300
Minimum 20 in. (508mm) in front and
8 in. (203mm) on sides to fuel loading doors
Tile or
Marble
Combustible Floor
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . .
Fascia
Outer Can
Flange
Ember Strip (Seal gap with high
temp, noncombustible sealant able
to withstand 300°)
Tile or Marble
Minimum 4 in. 101.6 mm)
Cement Board or equivalent, (or
two 1/2 in. pieces) and "k" value
= 0.49.
Micore 300
Min 20 in. (508mm) in front and 8 in. (203mm)
on sides to fuel loading doors
Combustible Floor
2 x 4
2 x 4
3/4 in. (19mm)
Plywood
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . .
Figure 10.9 Fireplace and Hearth Extension Flush on the Floor.
Figure 10.10 Hearth Extension Flush on Floor but on Raised Platform
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fascia
Outer
Can
Flange
Ember Strip
(Seal gap with
noncombustible
sealant)
Tile or Marble
Minimum 4 in. (101.6 mm)
Cement Board or equivalent,
(or two 1/2 in. pieces) and
"k" value = 0.49. Micore 300
Min 20 in. (508mm) in front and 8 in.
(203mm) on sides to fuel loading doors
Combustible Floor
2 x 4
2 x 4
3/4 in.
(19mm)
Plywood
Non-combustible
framing materials
Figure 10.11 Raised Hearth Extension to Bottom of Fascia
Seal with
non-combustible
sealant
Figure 10.11 Position the Hearth Extension
E. Finishing Material
You may only use noncombustible material over the metal
face of the replace.
• Combustible Material
Materials made of or surfaced with wood, compressed
paper, plant bers, plastics, or other materials that can
ignite and burn, whether ame proofed or not, or whether
plastered or un-plastered shall be considered combus-
tible materials.
• Non-Combustible Material
Materials which will not ignite and burn. Such materials
are those consisting entirely of steel, iron, brick, tile, con-
crete, slate, glass or plasters, or any combination thereof.
Materials that are reported as passing ASTM E 136,
Standard Test Method for Behavior of Materials, in a Ver-
tical Tube Furnace at 750°C, shall be considered non-
combustible materials.