Installation
901032-00B, 07/2020
Innovative Hearth Products
DRT4000-C & DRT4200-C Series Direct-Vent Gas Fireplaces
18
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.
Model
A
B
C
D
E
40”
40-7/8
(1039)
78-1/4
(1988)
45-3/8
(1153)
40-1/2
(1029)
15-7/8
(404)
45”
45-7/8
(1166)
85-7/8
(2182)
61
(1550)
40-1/2
(1029)
17-1/2
(445)
Table 10 - Fireplace Framing Specifications
Table 11 - Fireplace Framing Specifications - Corner Installation with Horizontal Termination
B
A
C
D
E
Back wall of chase/enclosure (including finishing materials)
7 (178)
Front to rear with 1” distance to wall
Inches
(millimeters)
Vent Framing—Top Vent
with One 90° Elbow
**NOTE:
Dimension “D” is the
required framing depth when
units are installed with the
fireplace face flush to framing
Inches (millimeters)
Framing
construction to be
2 x 4, or larger.
B
C
D
A
1/2 A
5-1/8
(130)
5-1/8
(130)
7 (178)
7 (178)
12-1/8
(308)
10-1/2
(267)
E
Table 12 - Fireplace Specifications
Model
A
B
C*
D*
E
F
G
H
I
J
K
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)
21 (534)
12-3/8 (315)
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)
21 (534)
12-3/8 (315)
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
* C and D are glass viewing area dimensions
Inches (millimeters)
Model
A *
B
C
D**
E
DRT4240 Models
40-7/8
(1039)
41-1/4
(1048)
43-3/4
(1111)
23
(585)
28-1/4
(717)
DRT4245 Models
45-7/8
(1166)
41-1/4
(1048)
55-3/4
(1417)
23
(585)
N/A
(top vent only)
DRT4040 Models
40-7/8
(1039)
41-1/4
(1048)
43-3/4
(1111)
23
(585)
28-1/4
(717)
DRT4045 Models
45-7/8
(1166)
41-1/4
(1048)
43-3/4
(1111)
23
(585)
28-1/4
(717)
