Installation
900298-00, 10/2014
Innovative Hearth Products
Superior
TM
DRT/DRC3500 Series Direct-Vent Gas Fireplaces
18
Table 10: Fireplace Framing Specifications
Model
A *
B
C
D
E
Vent Framing—Top Vent
with One 90° Elbow
NOTE:
Dimension “D” is the
required framing depth when
the finish material (drywall)
thickness is 1/2” (13mm).
Inches (millimeters)
Framing
construction to be
2 x 4, or larger.
B
C
D
A
1/2 A
5 1/8
(130)
7 (178)
12 1/8
(308)
10 1/2
(267)
E
35” Models
35 3/8
(899)
36 1/4
(895)
38 3/4
(984)
18
(447)
23 3/8
(594)
40” Models
40 3/8
(1026)
41 1/4
(1022)
43 3/4
(1111)
18
(447)
28 1/4
(717)
45” Models
45 3/8
(1153)
41 1/4
(1022)
43 3/4
(1111)
18
(447)
28 1/4
(717)
C = Minimum height of top vent installations
E = Minimum height of rear vent installations
* Minimum opening size; additional 1/8” per side is recommended.
NOTE:
Framing specifications do NOT apply for flexible venting.
When using flexible venting, refer to the kit requirements for
framing specifications.
Table 11: Fireplace Framing Specifications—Corner Installation with Horizontal Termination
Model
A
B
C
D
E
F
B
A
C
Inches
(millimeters)
D
E
Back wall of chase/enclosure (including finishing materials
7
(178)
35”
35 3/8
(899)
59 1/2
(1511)
42 1/16
(1068)
30 1/4
(768)
14 1/4
(362)
6 5/8
(168)
40”
40 3/8
(1026)
63 13/16
(1621)
45 11/32
(1152)
33 3/16
(818)
15 7/8
(403)
8 1/2
(216)
45”
45 3/8
(1153)
70 3/8
(1788)
49 3/4
(1264)
35 1/4
(895)
17 1/2
(445)
10 1/4
(260)
Table 12: Fireplace Specifications
NOTE:
When finishing the area around the hood, 5/8” clearance above hood is required for hood installation.
Top View
Front View
Left Side View
Right Side View
A
B
C
D
E
F
G
H
Blower
access panel
Hood
Junction
box access
Gas line
access
I
K
J
K
Model
A
B
C
D (door)
E
F
G
H
I
J
K
35” Models
32 1/8 (816)
28 3/4 (730)
22 1/4 (565)
32 3/8 (822)
35 1/4 (895)
25 (635)
12 1/2 (317)
32 7/8 (835)
6 7/8 (175)
17 (432)
10 1/6 (256)
40” Models
37 1/8 (943)
33 1/4 (845)
27 1/4 (692)
37 3/8 (949)
40 1/4 (1022)
30 (762)
15 (381)
37 7/8 (962)
6 7/8 (175)
17 (432)
10 1/6 (256)
45”Models
37 1/8 (943)
33 1/4 (845)
27 1/4 (692)
42 3/8 (1076)
45 1/4 (1149)
35 (889)
17 1/2 (445)
42 7/8 (1089)
6 7/8 (175)
17 (432)
10 1/6 (256)
*Front to rear with 1”
distance to wall
