Page 1
LENNOX™ ESTATE™ SERIES WOOD BURNING FIREPLACES • EST-36 / EST-42 / EST-50
15" O.D.
(381 mm)
Q
K
H
J
R
Front View
D
E
C
B
Top View
Appliance Specifications
F
Note: Outside air kit
installs on LEFT side
A
Model No. A B C D E F G H
EST-36
& EST-42
EST-50
Model No. J K L M N P Q R
EST-36
& EST-42
EST-50
for EST-36 & EST-42.
L
M
Left Side
in. 42-9/16 47-7/8 28-9/16 37-1/4 11 66-1/16 47-1/8 36 / 42
mm 1081 1216 725 946 279 1678 1197 914 / 1067
in. 53-1/4 59-1/2 29-5/8 44-5/8 14-1/4 84 61-7/8 50
mm 1353 1511 753 1133 362 2134 1572 1270
in.
29 6 (36”) / 3 (42”) 10-1/2 8-3/4 13 12 7
mm 737 152 (36”) / 76 (42”) 267 222 330 305 178
in. 36 4-3/4 15 10 10-5/8 11-1/8 8-1/2
mm 914 121 381 254
Note: Outside air kit
G
P
G
installs on RIGHT
side for EST-50.
F
L
N
M
Right Side
6-9/16
167
270 283
8-9/16
218
216
FIREPLACE FINISHES:
Mantels and Trim
In installations other than Canada, combustible mantels
and trim may be installed as shown in the illustrations
below and as per NFPA 211-Mantel/Trim Clearances. If a
mantel is of a noncombustible material, it is exempt from
these requirements as long as it does NOT interfere with
the installation or operation of glass doors.
For combustible mantel and trim specifications in
Canadian installations (EST-36 and EST-42 only), see
the fireplace Installation Instructions.
Combustible
Mantel
and Trim
12"
(305mm)
Max.
12"
(305mm)
Min.
Finished
Wall
1-1/2" (38mm)
Noncombustible
Wall Covering
Spacer
EST-36 & EST-42:
6-9/16" (167mm)
EST-50:
10" (254mm)
Fireplace
Opening
Typical U.S. Installation
FIREPLACE FINISHES:
Vertical Surround Limitations
Combustible materials may project beyond the sides
of the fireplace opening as long as they are kept
within the shaded area illustrated below.
Combustible
materials allowed
in shaded Areas
3-1/4"
(83mm)
4-3/4"
(121mm)
°
15
Note:
• Diagrams, illustrations, and photographs are
not to scale; consult fireplace Installation
Instructions.
• Product designs, materials, dimensions,
specifications, colors, and prices are subject
to change or discontinuance without notice.
• EST-50 models are not sold in Canada.
Fireplace
1/2"
(13mm)
12" (305mm)
Min. Distance to
Protected Side Wall
18" (457mm)
Min. Distance to
Unprotected Side Wall
FIREPLACE FINISHES:
Hearth Extensions and Wall Shields
A hearth extension must be installed with all
fireplaces. Its purpose is twofold: 1) to protect a
combustible floor in front of the fireplace from
both radiant heat and sparks; and 2) to distinguish
the prescribed hearth extension area from other
unprotected surfaces.
40"
(1016mm)
40"
(1016mm)
C
C
Models A B C D
EST-36
EST-42
EST-50
20"
(508mm)
20"
(508mm)
20"
(508mm)
B
D
36"
(914mm)
42"
(1066mm)
50"
(1270mm)
B
Wall shield
required if
less than
18" (457mm).
C
12"
(305mm)
12"
(305mm)
12"
(305mm)
A
C
60"
(1524mm)
60"
(1524mm)
74"
(1880mm)
A
Hearth Extension Dimensions
Page 1 of 2
P/N 506035-35 Rev. A 03/2011
Page 2
LENNOX™ ESTATE™ SERIES WOOD BURNING FIREPLACES • EST-36 / EST-42 / EST-50
Framing Specifications
If sheathing the chase or finishing with other thickness materials, calculations will need to be made.
Note: All framing dimensions calculated for 1/2 inch dry wall at the appliance face.
Insulate Joists
Same as Ceiling
Draft Stops
F10FS-2 Firestop
FTF10-CTDTM
Termination
Note: NonCombustible
Chase
Flashing
Must be
Used to
Cover
Chase
Opening
Insulation
(Thermal Barrier)
8’
(2.4m)
Level
Typical Installation
Optional
Insulation
in Outside
Walls of
Chase
Solid
Continuous
Surface
Outside
Base
FOAK-4
Air Kit
J
Rough Framing Face
(Unfinished Shown)
FOAK-4
K
Back Wall of Chase/Enclosure
Including Finishing Materials
A
Outside Chase
Back Wall of Chase/Enclosure
Including Finishing Materials if any
D
C
A
E
Corner Installation
if any
G
Rough Framing Face
(Unfinished Shown)
G
Rough
Framing Face
(Unfinished Shown)
F
Framing Dimensions
EST-36 and EST-42 EST-50
A 48 in (1219 mm) 60-3/4 in (1543 mm)
B
47-1/4 in (1200 mm) 62-1/4
1
B2 66-1/2
C 37-1/4
D 18-5/8
E 94-7/8
F 47-7/16
G 28-13/16
J 11-3/8
K 67
in (1689 mm)
in (946 mm)
in (473 mm)
in (2410 mm)
in (1205 mm)
in (732 mm)
in (289 mm)
in (1702 mm)
in (1581
84-1/2 in (2146
44-5/8 in (1133
22-5/16 in (567
104-1/8 in (2645
52-1/16 in (1322
29-3/4 in (756
10 in (254
73-5/8 in (1870
mm)
mm)
mm)
mm)
mm)
mm)
mm)
mm)
mm)
FOAK-4
Air Kit
Back Wall of Chase/Enclosure
Including Finishing Materials
A
Inside Chase
Note:
• The framed depth from a framed wall
(item “G” in the Framing Dimensions
table below) must always be measured
from a finished surface. If a wall
covering (such as drywall) is to be
attached to the rear wall, measure the
framed depth from the drywall surface.
This dimension MUST be exact.
• If the appliance is to be elevated
above floor level, a solid, continuous,
platform must be constructed.
• The header may rest on the top metal
spacers; however, NEVER notch the
header to fit around the spacers.
• Consult all local codes.
if any
G
D
Pitch C D*
0/12 19" 19"
(483 mm) (483 mm)
6/12 19" 22"
(483 mm) (559 mm)
12/12 19" 27"
(483 mm) (686 mm)
Roof Framing
*Perpendicular to roof ridge
Page 2 of 2
B
False Header
Header
A
C
Flue Type A B
FTF10 & 13 19" 19"
B
2
B
1
Vertical (483 mm) (483 mm)
FTF10 & 13 19" 29"
30° Offset (483 mm) (737 mm)
Ceiling Framing
A
Fireplace Framing
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
P/N 506035-35 Rev. A 03/2011
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