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FIREPLACE SPECIFICATIONS
Vertical Venting Through the Ceiling:
Frame ceiling opening - Use a plumb line
from the ceiling above the appliance to
locate center of the vertical run. Cut and/or
frame an opening, 10-1/2" x 10-1/2" (267
mm x 267 mm) inside dimensions, about
this center mark
(see Figure 25).
Vent Size
Co-axial DV
Vent Size
4-1/2" Inner
/ 7-1/2" Outer
Notes
* The Steady State Efficiency numbers based on
maximum vent configuration.
Due to Lennox' ongoing commitment to quality, all
specifications, ratings and dimensions are subject
to change without notice.
Input (BTU) - MV & Electronic
Natural & Propane Gas
Models Input Rate (BTU / HR)
LMDVT-3328CPM
LMDVR-3328CPM
17,500
LMDV-3530CPM 20,000
LMDV-4035CPM 27,000
Efficiencies %
Natural Gas Propane
Models P4 Steady
State
AFUE P4 Steady
State
AFUE
LMDVT-3328 45 64 62 49 66 64
LMDVR-3328 53 63 61 55 66 64
LMDV-3530 53 64 62 55 62 60
LMDV-4035 59 69 67 60 69 67
Figure 14
.oNledoM A B C D E F** G H J K L M N
.ni 8/133 8/103 71 2/172 8/133 8/591 2/112 4/301 61/316 3
mm 148 567 234 996 148 894 645 372 371 67 212 07 033
.ni 8/153 8/123 91 2/192 8/153 61/1112 8/742 1 61/72 9 3 9 3 61
mm 298 618 384 947 298 155 236 613 022 67 022 67 604
.ni 8/104 8/173 42 2/143 8/104 61/1162 8/792 1 61/514 9 3 9 3 61
mm 9101 349 016 678 9101 876 957 973 022 67 022 67 604
LMDVT-3328
LMDVR-3328
LMDV-3530
LMDV-4035
132 3/4
8 11/32
A
B
D
7
(178)
5-1/8
12-1/8
(308)
10-1/2
(
267
)
C
VENT FRAMING -
TOP VENT WITH ONE
90
ϒ
ELBOW
VENT FRAMING -
REAR VENT WITH
NO ELBOWS
** Framing should be constructed
of 2x4 or larger lumber
Inches (mm)
E
(130)
(130)
7
(308)
(178)
E is the required framing depth dimension when the
finish material (drywall) thickness is 1/2 in. (13mm).
A
**FRAMING WITH SQUARE HORIZONTAL TERMINATIONS (SV4.5HT-2)
5-1/8
12-1/8
1/2
Framing
Framing Dimensions
Model No. A B C D E
LMDVT-3328
in. 33-1/4 33-1/4 ------ 37-3/4 12-7/8
mm 845 845 ------ 959 327
LMDVR-3328
in. 33-1/4 33-1/4 19-5/8 ------ 12-7/8
mm 845 845 498 ------ 327
LMDV-3530
in. 35-1/4 35-1/4 21-11/16 39-3/4 16
mm 895 895 551 1010 406
LMDV-4035
in. 40-1/4 40-1/4 26-11/16 44-3/4 16
mm 1022 1022 678 1137 406
G
E
F**
H
N
1-5/8
(42)
L
K
Top View
NOTE - Eyebrow
hood shown as positioned
in louvered front model.
*CONCENTRIC FLUE
FLUE - 4-1/2 (114)
COMBUSTION AIR - 7-1/2 (190)
GAS INLET
(Either Side
and bottom)
* LMDV models have a top and rear vent
Front View
(Louvered Front Model Shown)
ELECTRICAL
INLET
2-3/4
x 2 (70 x 51)
COVER PLATE with
KNOCKOUT)
Right Side View
LMDVR models have only a rear vent
LMDVT models have only a top vent
J
M
**Note 1 - Collars protrude one inch on LMDVR-3328 model.
**See Note 1
** See Note 1
6 (152)
1-3/8 (35)
OPTIONAL ELECTRICAL
INLET KNOCKOUT,
REQUIRING A FIELD
PROVIDED JUNCTION BOX
(Either Side)
D
C
B
3 (76)
FRAMING SPACERS (Top & Sides & Rear)
1/2 (13)
A