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FIREPLACE SPECIFICATIONS
Vent Size
Co-axial DV Vent Size
4-1/2" Inner
7-1/2" Outer
Notes
* The Steady State Effi ciency numbers based on
maximum vent confi guration.
Due to Lennox' ongoing commitment to quality,
all specifi cations, ratings and dimensions are
subject to change without notice.
Effi ciencies
Natural Gas Propane
Models EnerGuide Steady
State
AFUE EnerGuide Steady
State
AFUE
SSDV-3530 55 67 63 60 68 64
SSDV-4035 60 69 65 61 69 65
Input (BTU) - MV & Electronic
Natural (NG) & Propane (LP) Gas
Models Fuel Input Rate (BTU / HR)
SSDV-3530
NG
High 23,000
Low 17,500
LP
High 23,000
Low 17,500
SSDV-4035
NG
High 29,000
Low 21,500
LP
High 29,000
Low 22,500
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, 10¹⁄₂" x 10¹⁄₂" (267 mm x 267 mm) inside dimensions, about this center mark (see Figure 19).
G
F**
H
16
(406)
1/2 (13)
3 (76)
Top View
*Co-axial Direct Vent Pipe
Flue - 4-1/2 (114)
Combustion Air - 7-1/2 (190)
Framing Spacers
(Top, Sides & Rear)
GAS INLET
(Either Side
and bottom)
*
SSDVR models are
rear vent only
SSDVT models are
top vent only
(Louvered Front Model Shown)
**Rear vent models only
Electrical Inlet
2-3/4 x 2 (70 x 51)
Cover Plate
W/Knockout
Right Side View
9
(229)
E
B
D
C
Front View
3 (76)
A
1-3/8
(35)
(Optional)
ELECTRICAL
INLET Knockout
Requiring A Field
Provided Junction
Box (Either Side)
(140)
5-1/2
9-3/8
(238)
2
(53)
NOTE - Hood shown as
positioned in louvered
front model.
Fireplace Dimensions - Inches (millimeters)
Model A B C D E F (rear vent only) GH
SSDVT-3530
SSDVR-3530
35-1/8 (892) 32-1/8 (816) 19 (483) 29-1/2 (749) 35-1/8 (892) 21-11/16 (551) 24-7/8 (632) 12-7/16 (316)
SSDVT-4035
SSDVR-4035
40-1/8 (1019) 37-1/8 (943) 24 (610) 34-1/2 (876) 40-1/8 (1019) 26-11/16 (678) 29-7/8 (759) 14-15/16 (379)
Framing Dimensions - Inches (millimeters)
Models A B C D E
SSDVT-3530 35-1/4 (895) 35-1/4 (895) N/A 39-3/4 (1010) 16"
SSDVR-3530 35-1/4 (895) 35-1/4 (895) 21-11/16 (551) N/A 16"
SSDVT-4035 40-1/4 (1022) 40-1/4 (1022) N/A 44-3/4 (1137) 16"
SSDVR-4035 40-1/4 (1022) 40-1/4 (1022) 26-11/16 (678) N/A 16"
A
B
D
7
(178)
5-1/8
12-1/8
12-1/8
(308)
10-1/2
(267)
C
VENT FRAMING -
TOP VENT WITH ONE
90 ELBOW
VENT FRAMING -
REAR VENT WITH
NO ELBOWS
**Framing should be constructed
of 2 x 4 or larger lumber.
Inches (millimeters)
E
(130)
5-1/8
1/2
(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 Termination SV4.5HT-2
Figure 14