NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
9
45"
(1143 mm)
31-9/16"
(802 mm)
21-1/4"
(540 mm)
8-3/16"
(208 mm)
Top View
Right Side
Gas Line
Access
Junction
Box
Combustion
Air Inlet
9-7/8"
(251 mm)
43"
(1092 mm)
21-1/4"
(540 mm)
43"
(1092 mm)
21-1/4"
(540 mm)
Left Side
45"
(1143 mm)
Front View
43"
(1092 mm)
7-3/16"
(183 mm)
41"
(1041 mm)
2"
(51 mm)
12-1/2"
(318 mm)
22-5/16"
(566 mm)
13-7/16"
(341 mm)
8-3/8"
(213 mm)
Fireplace Top Spacer
Fireplace
Top Spacer
Gas Line
Access
19"
(483 mm)
10"
(254 mm)
12
¹⁄₂
"
(318 mm)
47"
(1194 mm)
1"
(25 mm)
38"
(965 mm)
FIREPLACE SPECIFICATIONS - MODEL MP-42OD
Figure 18
Notes
Due to Lennox' ongoing commitment to quality,
all specifi cations, ratings and dimensions are
subject to change without notice.
All framing dimensions calculated for 1/2" dry wall
at the fi replace face. If sheathing the chase or
fi nishing with other thickness materials, calcula-
tions will need to be made.
See
Page 10
for Ceiling and Roof Framing
Dimensions
Diagrams & Illustrations Not to Scale
Fireplace Framing
Header
(See
Note **)
B
1
A
B
2
A
Outside Chase
G
C
H
Including Finising Materials
if any
Rough
Framing Face
(Unfinished Shown)
Combustion
Air Kit - Optional
*
Framing Dimensions
A
46-1/2"
1181 mm
B
1
43-1/2"
1105 mm
B
2
60-1/2"
1537 mm
C
33"
828 mm
D
17-1/2"
445 mm
E
76-1/4"
1937 mm
F
38-1/8"
968 mm
G
21-5/8"
549 mm
H
20-5/8"
524 mm
J
53-7/8"
1362 mm
K
8"
203 mm
Outside Chase - Indoor Installations
Outside
Air Kit
G
A
Outside Chase
Back Wall of Chase/Enclosure
Including Finishing
Materials if any
Rough Framing Face
(Unfinished Shown)
Optional
Drainage
Line
**Note:
When Framing With 6” Studs Header Must Be 17”
(432mm) Higher. Use Security Chimney’s OR15 Offset/Re-
turn Elbow To Recess The Chimney Back 2 1/2” (64mm).
Flat Frame Down To A False Header At (B
1
). Maintain
Required Clearance To Chimney At All Times.
* 1" Air Space to insulation and construction materials on the
back and sides.
OTL Report No. 116-F-37-2
Corner Installation
J
D
A
E
F
Back Wall of
Chase/Enclosure
Including Finising
Materials
if any
Rough
Framing Face
(Unfinished Shown)
OAK-OD Combustion
Air Kit
A
K
G
Inside Chase
Back Wall of Chase/Enclosure
Including Finishing Materials, if any.
Rough
Framing Face
(Unfinished Shown)
OAK-OD Combustion
Air Kit
Product Reference Information
Cat.
No.
Model
Ship.
Weight
Ship.
Volume
H1934
MP-42OD
188 lb.
24 cu. ft.
