Fireplace And Framing Specifications - Lennox Merit Plus Series Installation Instructions Manual

LENNOX HEARTH PRODUCTS • MERIT PLUS

FIREPLACE AND FRAMING SPECIFICATIONS

Model No.
in. 35-1/4
MPDP35
mm
in. 40-1/4
MPDP40
mm
Diagrams, illustrations and photographs are not to scale. Consult installation
instructions. Product designs, materials, dimensions, specifications, colors,
and prices are subject to change or discontinuance without notice.
Efficiencies %
Natural Gas
Fireplace
Model
EnerGuide
AFUE
(Rear Vent)
MPDP35 70
MPDP40 71
Based on CSA P.4.1-09
Model No.
in.
MPDP35
mm
in.
MPDP40
mm
Figure 12
10
Framing
A B C D
36-1/4 21-11/16 49
895 921 551 1245
41-1/4 26-11/16 54
1022 1048 678 1372
Notes
Propane
EnerGuide
AFUE
(P4) (P4)
69 70 71
70 71 72
Rear/Side
G
Framing
H
Spacers
Top
Standoff
Top View
E
A
D
Front View
A B C D
36-1/8 32-1/8 19 29-1/2
918 816 483 749
41-1/8 37-1/8 24 34-1/2
1045 943 610 876
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
®
VENT FRAMING:
TOP VENT with
E
1 ft. of pipe and
16 90-degree elbow
VENT FRAMING:
406
REAR VENT
16
with no elbows
406
B
1/2
Concentric Flue*:
Flue = 4-1/2" (114 mm);
Combustion Air = 7-1/2"
(190 mm).
J
4"
(102 mm)
Top Standoff
Eyebrow Hood
Gas Inlet (either
side and bottom)
Optional Electrical Inlet
B Knockout (either side;
C
requires field-provided
junction box)
1-3/8" (35 mm)
E F G
35-1/8 21-11/16 24-7/8
892 551 632
40-1/8 26-11/16 29-7/8
1019 678 759
10-1/2
( )
267
5-1/8
(130)
5-1/8
D (130)
C
E
A
A
Dimension "E" is required framing depth when
finish material (drywall) thickness is 1/2 in. (13mm).
*All MPDP models have a top and rear vent.
N
6"(152 mm)
L
K
Right Side View
H J K L
12-7/16 9 3 9
316 220 76 220
14-15/16 9 3 9
379 220 76 220
Framing should be
constructed of 2x4
or larger lumber.
7
(178)
12-1/8
(308)
7
(178)
12-1/8
(308)
Inches (mm)
1/2" (13 mm)
Framing Spacer
F
1-5/8"
Electrical Inlet
M
Cover Plate
2" x 2-3/4"
(51 x 70 mm)
with Knockout
M N
3 16
76 406
3 16
76 406