Lennox Hearth Products Montebello LSM40MN-2 Installation Instructions Manual page 8

FIREPLACE FRAMING SPECIFICATIONS
VENT FRAMING -
TOP VENT WITH 2 FEET
VERTICAL VENT AND
ONE 90° ELBOW
B
1/2 A
Inches (mm)
Figure 9
Model
No.
in.
LSM40-2
mm
in.
LSM45-2
mm
Corner Framing with Square Termination (SV8HTS)
Figure 10
8
13
(
330
6-1/2
(165)
C
25-1/4
(641)
A
Framing
A B C
50-5/8 8-5/8 59-1/8
1286 2124 1502
56-/4 89-7/8 6-1/2
1441 228 161
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Framing should be constructed
of 2x4 or larger lumber.
)
8-1/2
(216)
15
( )
381
D
41-7/8
1064
44-7/8
1140
Back wall of chase/enclosure
(including any finishing materials)
Model
A
No.
in. 50-/4
LSM40-2
mm 1289
in. 56-7/8
LSM45-2
mm 1445
C
A
B
B C
4 75-1/8
1092 1908
48 80-1/16
1219 204
D