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8 in. (203mm) minimum
from each side of
fuel loading door
A
B
Figure 7.3
Minimum Hearth Extension Dimensions
Model #
A
B
NorthStar
in.
41
20
mm
1041
508
•
i e la e an Hea t tension us on t e oo
Non- o
usti le oo in a ini u o 20 in 508
in ont o an 8 in 203
to eit e si e o t e uel
o enin is e ui e as s o n in i u e 3
T e onst u tion o an ate ials use o a ea t
e tension a e s o n in i u e 4 A ea t e tension
o t is onst u tion a e ove e it an non-
o
usti le e o ative ate ial an a ave a
ini u t i ness as e i u e 4 Seal a s et een
t e ea t e tension an t e ont o t e e la e it a
ea o non- o
usti le sealant o out
F a s c ia
O u t e r C a n
F l a ng e
P r o t e c t iv e m e t a l
h e a r t h s t r ip
T il e , m a r b l e o r o t h e r
no n- c o m b u s t ib l e f inis h m a t e r ia l
M inim u m 4 in. ( 1 0 2 m m ) C e m e nt B o a r d
o r e q u iv a l e nt , ( o r t w o p ie c e s H X 4)
M inim u m 20 in. ( 5 0 8 m m ) in f r o nt a nd
8 in. ( 20 3m m ) o n s id e s t o f u e l l o a d ing d o o r s
C o m b u s t ib l e F l o o r
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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N o n- c o m b u s t ib l e
m a t e r ia l s u p p l ie d
w it h u nit .
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N o n- c o m b u s t ib l e s e a l a nt o r g r o u t
T il e , m a r b l e o r o t h e r
no n- c o m b u s t ib l e
f inis h m a t e r ia l
Figure 7.4
Fireplace and Hearth Extension Flush on the Floor.
• Raise Hea t tension a in
T e ea t a in ust e onst u te o non-
o
usti le ate ials su as etal a in o
e uivalent ate ial an to e it t o H 4s o
e uivalent ate ial Ta le 2
When creating the platform, allow for the thickness of
the non-combustible finishing materials
i u e 5
O u t e r C a n
F l a ng e
N o n- c o m b u s t ib l e
m a t e r ia l s u p p l ie d
w it h u nit
F a s c ia
P r o t e c t iv e m e t a l
h e a r t h s t r ip
M inim u m 4 in. ( 1 0 2 m m ) C e m e nt B o a r d
o r e q u iv a l e nt , ( o r t w o p ie c e s H X 4)
M inim u m 20 in. ( 5 0 8 m m ) in f r o nt a nd
8 in. ( 20 3 m m ) o n s id e s t o f u e l l o a d ing d o o r s
C o m b u s t ib l e F l o o r
N o n- c o m b u s t ib l e s e a l a nt o r g r o u t
T il e , m a r b l e o r
o t h e r
no n- c o m b u s t ib l e
f inis h m a t e r ia l
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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N o n- c o m b u s t ib l e
f r a m ing m a t e r ia l s
Figure 7.5
Raised Hearth Extension to Bottom of Fascia
•
i e la e installe us on t e oo an ea t e tension
aise to otto o as ia
Non- o
usti le oo in a ini u o 20 in 508
in ont o an 8 in 203
to eit e si e o t e uel
o enin is e ui e see i u e 3
WARNING! Risk of Fire!
Hearth extensions are to be installed only as illustrated
to prevent high tempertures from occurring on concealed
combustible materials.
36
Heat & Glo • NORTHSTAR • 480-2360 Installation Manual • Rev D • 05/30/13