Osburn OB01801 - Manual (Page 14)

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MINIMUM MASONRY
OPENING
J 20" (508 mm)
K 23 3/8" (594 mm)
L 14 5/8" (371 mm)
CLEARANCES
F 17" (432 mm)
G 10" (254 mm)
H 14" (356 mm)
I 22" (559 mm)
FLOOR PROTECTOR
CANADA USA
B 18" (457 mm) – Note1 16" (406 mm) – Note 1
M 8" (203 mm) N/A (Canada only)
N N/A (USA only) 8" (203 mm)
* For a 6" (152 mm) shelf. See Table SHELF POSITIONING (Section 2.5) for other shelf
dimensions.
Note 1: From door opening. The depth of a non-combustible shelf in from of the insert is included
in the calculation of the floor protector’s dimensions.
IMPORTANT: The masonry hearth should be at least 4 inches (102 mm) higher than the
combustible floor in front of it. If the hearth elevation is lower than 4 inches, the non-combustible
floor protector in front of the insert should have an R value equal or greater than 1.00.