Table of Contents
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Innovative Hearth Products
DRT63ST Direct-Vent Gas Fireplaces
Vertical (Roof) Termination Systems
This section includes configurations for verti-
cal (roof) termination systems with either
straight vertical venting (see below and Page
23) and offset vertical venting (see Page 23).
8" DV Lock rigid vent pipe and termination
components are shown in the figures.
The tables on Page 23 summarize each sys-
tem's minimum and maximum vertical and
horizontal length values.
For vertical (roof) termination, the minimum
vent height above the roof and/or adjacent
walls is specified in ANSI Z223.1, latest edi-
tion (in Canada, the current CAN/CGA-B149.1
installation code) and by major building
codes. Always consult your local codes for
specific requirements. A general guide to
follow is the Gas Vent Rule (see Figure 4 on
Page 11).
Vertical Termination System
with Straight Vertical Venting
NOTE: If not already done, install the
provided vent restrictor before proceed-
ing (see Page 19).
Determine the number of straight vent sec-
tions required. Available straight vent sec-
tions (and their effective lengths) are listed
in Table 7, below. See Page 42 for all venting
components.
Plan the vent lengths so a joint does not occur
at the intersection of ceiling or roof joists.
Refer to the "VENT SECTION LENGTHS"
charts at right.
Vertical Termination System
with Straight Vertical Venting
Termination
Max. 60 ft
(18 m)
Min. 6 ft
(1.8 m)
Figure 18
20
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7 5
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9 7
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1
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1
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1
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1
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1
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1
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5 .
Flashing and
1
2 7
5 .
Storm Collar
1
7 7
1
6 8
1
6 9
5 .
2
7 0
Min. 1" (26 mm)
Clearance to
2
1 1
5 .
Combustibles
2
7 1
5 .
2
9 2
5 .
Vertical Firestop
2
2 3
5 .
2
1 4
5 .
2
6 4
2
2 5
8" DV Lock
Vent Sections
(8DVL6, 8DVL12,
Cat. No. Model No.
8DVL24, 8DVL36,
8DVL48)
F4339
F4340
F4341
F4342
F4343
Table 7
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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5 2
1
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5 2
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5 7
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1
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5 7
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1
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6 .
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0
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1
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5 2
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1
0
0
7
1 2
0
1
0
7
Available Straight Vent Sections
Description
8DVL6
6" (152 mm) Vent Section
8DVL12
12" (305 mm) Vent Section
8DVL24
24" (610 mm) Vent Section
8DVL36
36" (914 mm) Vent Section
8DVL48
48" (1219 mm) Vent Section
See Page 42 for a list of all approved venting components.
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3 .
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3 .
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5
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3
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5 .
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1 .
5 2
0
0
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6
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5 .
2 5
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1
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3 5
1 .
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1
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3 .
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5 .
1
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9 5
3 .
5 7
1
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7
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0 6
0
Effective Length
4-1/2" (114 mm)
10-1/2" (267 mm)
22-1/2" (572 mm)
34-1/2" (876 mm)
46-1/2" (1181 mm)
Installation Instructions
900355-01, 01/2020
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2 1
4 2
6 3
8 4
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1 -
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1
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2
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1
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5 1
0
0
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3 1
3 1
1
0
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3 1
4 1
2
0
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5 1
0
1
0
3 1
5 1
1
1
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3 1
5 1
0
0
0
4 1
4 1
0
0
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5 1
2
0
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4 1
6 1
0
1
0
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1
1
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4 1
7 1
0
0
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5 1
0
0
0
5 1
6 1
1
0
0
5 1
7 1
0
1
0
5 1
6 1
Metric
Conversion
Inches x 25.4 = mm.
Inches x 2.54 = cm.
Inches x 0.0254 = m.
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