Lennox Hearth OASIS SERIES LSO-43 - Manual (Page 7)

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 7
Note: The framed depth, 25 ⁵⁄₈" (651 mm)
from a framed wall, must always be measured
from a finished surface. If a wall covering such
as drywall is to be attached to the rear wall,
then the framed depth must be measured from
the drywall surface. It is important that this
dimension be exact.
If the appliance is to be elevated above floor
level, a solid continuous platform must be
constructed.
Consult all local codes.
Figure 10
Figure 11
Framing Dimensions for Ceiling
Flue Type A B
FTF10 Vertical 19" 19"
(483 mm) (483 mm)
FTF10 19" 29"
Offset 30
°
(483 mm) (737 mm)
Figure 12
Framing Dimensions for Roof
Pitch C D*
0/12 19" 19"
(483 mm) (483 mm)
6/12 19" 22"
(483 mm) (559 mm)
12/12 19" 27"
(483 mm) (686 mm)
* Perpendicular to roof ridge
Figure 14
Figure 15
Figure 13
Note: All framing dimensions calculated for 1/2"
dry wall at the fireplace face. If sheathing the
chase or finishing with other thickness materials,
calculations will need to be made.
FRAMING SPECIFICATIONS
Framing Dimensions
Fireplace Opening Width
LSO-43
A 52 ⁷⁄₈" (1343 mm)
B 50" (1270 mm)
C 31 ³⁄₄" (806 mm)
D 15 ⁷⁄₈" (403 mm)
E 82" (2083 mm)
F 41" (1041 mm)
G 25 ⁵⁄₈" (651 mm)
J 13 ⁷⁄₈" (352 mm)
K 58" (1473 mm)
Header
Fireplace Framing
B
A
A
B
Ceiling Framing
C
D
Roof Framing
A
G
Inside Chase
Back Wall of Chase/Enclosure
Including Finising Materials if any
Rough
Framing Face
(Unfinished
Shown)
Outside
Air Kit
A
E
F
D
C
K
Back Wall of
Chase/Enclosure
Including Finishing
Materials if any
Rough
Framing Face
(Unfinished Shown)
Corner Installation
Outside
Air Kit Optional
Drainage Line
Outside
Air Kit
G
A
J
Outside Chase
Back Wall of Chase/Enclosure
Including Finishing
Materials if any
Rough Framing Face
(Unfinished Shown)
Optional
Drainage
Line