Installation
900966-00B, 04/2019
Innovative Hearth Products
DRT3000-C Series Direct-Vent Gas Fireplaces
18
Model
A
B
C*
D*
E
F
G
H
I
J
K
35” Models
32-1/8 (816)
26-5/8 (677)
19-1/2 (496)
29-1/4 (743)
35-1/4 (895)
25 (635)
12-1/2 (317)
32-7/8 (835)
6-7/8 (175)
17 (432)
10-1/8 (258)
40” Models
37-1/8 (943)
34-5/8 (880)
24-1/2 (623)
34-1/4 (870)
40-1/4 (1022)
30 (762)
15 (381)
37-7/8 (962)
6-7/8 (175)
17 (432)
10-1/8 (258)
45”Models
37-1/8 (943)
34-5/8 (880)
24-1/2 (623)
39-1/4 (997)
45-1/4 (1149)
35 (889)
17-1/2 (445)
42-7/8 (1089)
6-7/8 (175)
17 (432)
10-1/8 (258)
NOTE: When in top vent mode, No combustible material shall be allowed to contact the rear flue cap/cover.
Top View
Front View
Left Side View
Right Side View
A
C*
B
D*
E
F
G
H
Blower
access panel
Hood
Junction
box access
Gas line
access
I
K
J
K
Model
A *
B
C
D
E
35” Models
35-7/8
(911)
36-1/4
(920)
38-3/4
(984)
18-1/2
(470)
23-3/8
(594)
40” Models
40-7/8
(1038)
41-1/4
(1148)
43-3/4
(1111)
18-1/2
(470)
28-1/4
(717)
45” Models
45-7/8
(1165)
41-1/4
(1148)
43-3/4
(1111)
18-1/2
(470)
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.
NOTE: When in top vent mode - No combustible material shall be
allowed to contact the rear flue cap/cover.
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
Model
A
B
C
D
E
F
35”
35-7/8
(911)
59-1/2
(1511)
42-1/8
(1070)
30-1/4
(768)
14-1/4
(362)
6-5/8
(168)
40”
40-7/8
(1038)
63-7/8
(1622)
45-3/8
(1153)
33-1/4
(845)
15-7/8
(403)
8-1/2
(216)
45”
45-7/8
(1165)
70-3/8
(1788)
49-3/4
(1264)
35-1/4
(895)
17-1/2
(445)
10-1/4
(260)
Table 10 - Fireplace Framing Specifications
Table 12 - Fireplace Specifications
Table 11 - Fireplace Framing Specifications - Corner Installation with Horizontal Termination
B
A
C
D
E
F
Back wall of chase/enclosure (including finishing materials)
7 (178)
Front to rear with 1” distance to wall
Inches
(millimeters)
* C and D are glass viewing area dimensions
Inches (millimeters)
