9
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT
®
SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • INSTALLATION INSTRUCTIONS
fIREPLACE ANd fRAMING SPECIfICATIONS
NOTE: Diagrams, illustrations and
photographs are not to scale. Product
designs, materials, dimensions,
specifications, colors, and prices are
subject to change or discontinuance
without notice.
Input (BTU/hr) Manually-Modulated
Gas Valves (all models)
Model
Input Rate (BTU / HR)
Natural Gas
Propane Gas
MLBV-35
17,000 high
13,000 low
17,000 high
14,000 low
MLBV-40
22,000 high
17,000 low
20,000 high
15,500 low
Figure 8-1
framing dimensions
Model No.
A
B
C
MLBV-35
in.
35-1/4
35-1/4
16
mm
895
895
406
MLBV-40
in.
40-1/4
40-1/4
16
mm
1022
1022
406
“C” is the required framing depth dimension
when the finish material (drywall) thickness
is 1/2 in. (13mm).
fIREPLACE fRAMING dIMENSIONS
Construct framing with 2x4 or larger lumber.
A
B
C
A
1/2
Corner framing dimensions
Model No.
d
E
f
G
MLBV-35
in.
35-1/4
57-1/2
40-5/8
28-3/4
mm
895
1461
1032
730
MLBV-40
in.
40-1/4
61-13/16 48-11/32 30-11/16
mm
1022
1554
1101
779
F
Back wall of chase/enclosure
(including any finishing materials)
G
D
E
CORNER fRAMING dIMENSIONS
