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13
(330)
16
(406)
6-1/2
(165)
C
Inches
(millimeters)
1-1/2
(38)
D
A
B
E
~
11
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 12
D
B
13
(330)
16
(406)
6-1/2
(165)
C
Inches
(millimeters)
A
*For indoor/outdoor installations, the control side
of the fireplace must be installed on the indoor side.
LENNOX HEARTH PRODUCTS • MONTEBELLO
®
SEE-THROUGH DIRECT-VENT GAS FIREPLACES (LSM40ST-N / LSM40ST-P) • INSTALLATION INSTRUCTIONS
FRAMING SPECIFICATIONS
Framing should be constructions of 2x4 or larger lumber.
LSM40ST A
B
C
D
E
in 52-1/16 47-5/16 75-1/2 26-5/16 6
(mm) (1322) (1202) (1918) (668) (152)
Dimension B is from replace base to top framing member.
Dimension C is from replace base to centerline of horizontal vent pipe.
Minimum vent framing: 2 ft vertical vent and one 90° elbow. For other
venting configurations, see Step 3, INSTALL VENTING SYSTEM.
1/2-inch board for platform (shown in gray).
Dimension E is a 6-inch clearance from replace base to outdoor
surface (e.g., deck, patio, lanai) that is required as a moisture barrier
(not a combustible clearance) on outdoor side only.
INDOOR SIDE
OUTDOOR SIDE*
Outdoor Surface (e.g., deck, patio, lanai)