C. Mantel and Wall Projections
A o
usti le antel a e ositione no lo e t an 60
in 1524
o t e ase o t e e la e
Re e to Se tion 3 o e u e antel ei t allo an es
T e o
usti le antel a ave a a i u e t o
12 in 305
o
usti le t i ie es t at o e t no
o e t an 3/4 in 1
o t e a e o t e e la e
an e la e no lose t an 6 in 152
o t e to
o si e o t e e o ative ont o
usti le t i ust not
ove
• t e etal su a es o t e e la e
•
e e t e non- o
usti le oa is la e ove t e
etal su a es
• t e s a e et een t e etal a e o t e e la e an
a in e
e s
60 in.
( 1 5 24 m m )
M a nt e l
C l e a r a nc e s a r e
f r o m b o t t o m o f
a p p l ia nc e t o l o w e r
e d g e o f m a nt e l o r
t r im
T r im
48 in.
( 1 21 9 m m )
Figure 7.2 Mantel Specifications
D. Finishing the Hearth Extension
Table 7.1
R
= 1/k x inches of thickness
Table 7.2
WARNING! Risk of Fire!
High temperatures, sparks, em-
bers or other burning material falling from the fireplace
may ignite flooring or concealed combustible surfaces.
• Protective metal hearth strips MUST be installed.
• Hearth extensions MUST be installed exactly as
specified.
A ea t e tension ust e installe it all e la es to
ote t t e o
usti le oo in ont o t e e la e o
ot a iant eat an s a s
•
ou M ST use a ea t e tension it t is e la e
• Re e to i u e 4 o ini u i ensions
• T is e la e as een teste an a
ove o use it
a ea t e tension insulate to a ini u R value o
2 06
• T e ea t e tension ate ial M ST e ove e it
tile stone o ot e non- o
usti le ate ial
• Manu a tu e ea t ate ials ill usuall ave a
u lis e
R value
esistan e to eat o
k value
on u tivit o eat Re e to t e o ula in Ta le 1
to onve t a value to an R value
• Re e to Ta le 2 o ea t e tension insulation
alte natives
Hearth Extension Insulation Alternatives, R Value = 2.06
Material
k per inch
thick
r per inch
thick
Minimum
thickness
required
Hea t & Ho e H 3 H 4
0 4
2 06
1 in
SG Mi o e 300
0 4
2 06
1 in
SG Du o
e ent oa
1 2
0 52
4 in
e ent Mo to
5 0
0 20
10 1/2 in
o
on i
5 0
0 20
10 1/2 in
e a i Tile
12 50
0 08
25 3/4in
A st on
iva Gua lus
0 46
2 18
1 in
Ma le
14.3-20.0
0.07-0.05
29 1/2 - 41 1/4 in.
35
Heat & Glo • NORTHSTAR • 480-2360 Installation Manual • Rev D • 05/30/13
