Osburn OB04010K Installation And Operation Manual page 38

6.3.5.3 Option #3 - Installation on a more than 8" raised base
• When installed on a more than 8" (203 mm) raised base (C), A 2.00 R value for the hearth extension is
required. The non-combustible hearth extension floor area must extend at least 16" (406 mm) (B) in
front of the hearth.
• The joint between the hearth extension and the fireplace (E), for the entire width of the floor
protection, must be protected by a bent and continuous piece of sheet metal (not included).
• An 84" clearance between the fireplace base and the ceiling (A) must be respected.
A
B
C
E
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MINIMUM MEASUREMENTS
84" (2134 mm)
16" (406mm)
More than 8" (203 mm)
2" (51 mm)
HORIZON – Installation and Operation Manual