7
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
5 (127)
8-1/4
(209)
14
(356)
12 (305)
19
(483)
8 (203)
2
(51)
4
(102)
6
(152)
8
(203)
10
(254)
12
(305)
10 (254)
14 (356)
18 (457)
16 (406)
12 (305)
Top of
Appliance
inches (millimeters)
Mantel depth
Note - Hood shown
as positioned.
Figure 6 - Minimum Mantel Clearances
Header
Figure 5 - Minimum Distance to Unprotected Side Wall
Top View of
fireplace
45
o
Protected wall
shown in white
Inches (millimeters)
MINIMUM CLEARANCES TO COMBUSTIBLES
Appliance and Vent Clearances
The appliance is approved with zero clearance to combustible materials
on all sides (as detailed in Table 6), with the following exception:
When
the unit is installed with one side flush with a wall, the wall on the
other side of the unit must not extend beyond the front edge of the
unit (see
Figure 5
)
.
**Note: See Step 1 on Page 8 for clearance requirements to the
nailing flange at each side of the unit and any screw heads adjacent to it.
Hearth Extension
A hearth extension is not required with this appliance. If a hearth extension
is used, do not block the lower control compartment door. Any hearth
extension used is for appearance only and does not have to conform to
standard hearth extension installation requirements.
Wall finishes / Surrounds / Mantels
Note: Combustible wall finish materials and/or surround materials must
not be allowed to encroach the area defined by the appliance front face
(black sheet metal). Never allow combustible materials to be positioned
in front of or overlapping the appliance face (see Figure 5; also see
Figure 30 on Page 23).
Non-combustible materials, such as surrounds and other appliance trim,
may be installed on the appliance face with these exceptions: they must
not cover any portion of the removable glass panel.
Vertical installation clearances to combustible mantels vary according
to the depth of the mantel. See Figure 6. Mantels constructed of non-
combustible materials may be installed at any height above the appliance
opening; however, do not allow anything to hang below the fireplace hood.
Note: We recommend the use of high-temperature paint (rated 175°F or
higher) on the underside of the mantel.
Combustible materials
may project beyond
one side of the
fireplace opening
as long as they are
kept within the shaded
areas illustrated here.
Combustible Materials
Allowed In Shaded Area
“Safe zone”
Combustible walls
shown in dark gray.
At 14" minimum side
wall clearance, a
combustible wall can
project to any length.
At 8-1/4" side
wall clearance, a
combustible wall
can project 12".
MINIMUM CLEARANCES
Back
0 in. (0 mm) to Standoffs or dimples
Sides
0 in. (0 mm) to Standoffs or dimples**
Top
3 in. (76 mm)
floor
0 in. (0 mm)
from Bottom of Unit
to Ceiling
64 in. (1626 mm)
Vent
1 in. (25.4 mm)
SERVICE CLEARANCES
front
3 ft. (0.9 m)
Table 6
LENNOX HEARTH PRODUCTS • MERIT
®
SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • INSTALLATION INSTRUCTIONS
