Astria Tuscan42P2 - Page 6

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127051-01D
6
FIREPLACE INSTALLATION Continued
FIREBOX
SAFE ZONE
Top View of Fireplace
Min. 12" from
Perpendicular Side Wall
3"
2" Max.
33°
8"
MANTELS
Amantelmaybeinstalledifdesired(seeFigures4and5).Woodwork
such as wood trims, mantels or any other combustible material
projecting from front face, must not be placed within 12" of fireplace
openingandwithin9"oftoplouveropening.Combustiblematerials
above 12" and projecting more than 1 1/2" from fireplace must not
beplacedlessthan12"fromtopopeningofreplace(NFPA211,
Section-ClearancefromCombustibleMaterial).
Mantels or any other combustible material may come up to side edge
of black metal face of fireplace if projection from front face falls within
limits shown in Figure 4.
Figure 4 - Mantel Clearances to Combustible Material
12
1
/
4
" Ref.
6"
Ref.
15" Min.
12" Min.
1
1
/
2
" Max.
3" Nom.
33°
Combustible
Material
Safe
Zone for
Projection of
Combustible
Materials
Fireplace Opening
Non-Combustible
Materials Below
Top Spacer
Upper
Section of
Fireplace
DRAIN PAN (DP42)
For outdoor installations, the fireplace enclosure must allow for
adequate drainage and fresh air ventilation. It is recommended that
a sealed, corrosion resistant catch pan with provision for drainage
beinstalledunderthereplacewithinthereplaceenclosure(see
Accessories,page19).
HEARTH EXTENSION
Ahearthextensionprojectingaminimumof20"infrontofanda
minimum of 12" beyond each side of fireplace opening is required
toprotectcombustibleoorconstructioninfrontofreplace.Fab-
ricateahearthextensionusingamaterialwhichmeetsthefollowing
specifications: a layer of noncombustible, inorganic material having
athermalconductivityofk=.84BTUIN/FT
2
HR°F(orless)at1"
thick.Forexample,if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
Thermal conductivity "k" of materials can be obtained from manu-
facturerorsupplierofnoncombustiblematerial.Ifhearthextension
is to be covered, use noncombustible 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replace
frameandhearthextensionwithanon-combustiblematerialsuch
assand-cementgrout(seeFigure3).
WARNING: Hearth extension is to be installed
only as shown in Figure 3.
Figure 3 - Hearth Extension
Fireplace Front
Fireplace Front
Raised Hearth
Fireplace Front
Elevated
Seal Gap
Seal Gap
Ember Protector
Ember Protector
Ember Protector
Hearth
Extension
HearthExtension,NoncirculatingModels