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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 6: Optional Indoor Hearth Extension
Finish combustible material
must be installed at or below
base of fireplace.
Finish non-combustible material may
butt against front face of fireplace.
Also see Figure 7.
Floor
Panel
Front Face
of Fireplace
Figure 7: Optional Indoor and Outdoor Hearth Extensions
6" (152 mm)
minimum
Outdoor hearth extension:
All finish hearth material (combustible
and non-combustible) must be at least
6" (152 mm) below base of fireplace.
Outdoor
Side
Fireplace
(side view)
Indoor
Side
Indoor hearth extension:
Finish combustible material must be
installed at or below base of fireplace.
Finish non-combustible material may be
installed above base of fireplace and may
butt against front face of fireplace.
LENNOX HEARTH PRODUCTS • MONTEBELLO
®
SEE-THROUGH DIRECT-VENT GAS FIREPLACES (LSM40ST-N / LSM40ST-P) • INSTALLATION INSTRUCTIONS
Optional Indoor Hearth Extension
Combustible indoor hearth material may only be installed at or below
the base of the replace (see Figures 6 and 7).
Non-combustible indoor hearth material may be installed above the base
of the replace and may butt against the front face of the replace (see
Figures 6 and 7).
Also note the following:
• Combustible material may project beyond the sides of the replace
opening, as long as it is within the shaded area shown in Figure 10
on Page 9.
• Vertical installation clearances to combustible mantels vary according
to the depth of the mantel (see Figure 9 on Page 9).
• Non-combustible mantels may be installed at any height above the
appliance opening.
Optional Outdoor Hearth Extension
All outdoor hearth material (combustible and non-combustible) must
be installed a minimum of 6" (152 mm) below the base of the replace
(see Figure 7).
Also note the following:
• For vertical installation clearances to combustible outdoor mantels and
overhangs, see Page 32 and the instructions provided in the Outdoor
Installation Kit (required for all outdoor installations; see Page 34).
• Non-combustible outdoor mantels and overhangs may be installed at
any height above the appliance opening.
HEARTH EXTENSIONS (OPTIONAL)
Note: Hearth extensions are not required with this appliance.