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Osburn Matrix Inbuilt Installation and Operation Manual
CLEARANCES
F
G
H
MAXIMUM PROTRUSION
M
N
B
L
* For a 250 mm mantel shelf.
** Where a fresh air intake is needed, we suggest you add a minimum of 102 mm (4'') to the
width of the minimum masonry opening.
* ** If projection kit AC01323 (sold separately) is used L = 439 mm . If installed without projection
kit L = 541 mm.
Note 1: From door opening. The depth of the hearth extension in front of the wood inbuilt is
included in the calculation of the floor protector's dimensions.
Note 2: A min 80 mm air gap between the flue outer casing and the first timber stud above the
fireplace insert is required.
Note 3: The first internal wall stud must be 150 mm above the fireplace insert top and the front
wall up to that first stud must be made of non‐combustible material.
_ _____________________________________________________________________________ 3 5
80 mm
1250 mm
1340 mm*
40 mm
40 mm
FLOOR PROTECTION
MINIMUM MASONRY
I
J
K
O
P
500 mm
975 mm
OPENING
622 mm
781 mm**
439 mm ***
30 mm
30 mm
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