Installation
900684-01 06/2018
Innovative Hearth Products
DRT3000 Series Direct-Vent Gas Fireplaces
25
Vent section length table
Table 14
will assist calculating how many vent sections are needed for the planned vent configuration. When a vent
section is engaged with another section, its effective length will be 1-1/2” shorter.
Table 14 - Vent Section Length
Nominal Section
Length (in.)
6
12
24
36
48
Total Qty
Nominal Section Length
(in.)
6
12
24
36
48
Total Qty
Net Section Length
(in.)
4.5
10.5
22.5
34.5
46.5
Net Section Length (in.)
4.5
10.5
22.5
34.5
46.5
Height of Vent
Number of Vent Sections
Height of Vent
Number of Vent Sections
in.
ft
in.
ft
4.5
0.375
1
0
0
0
0
1
252
21
0
1
0
7
0
8
9
0.75
2
0
0
0
0
2
276
23
0
0
0
8
0
8
10.5
0.875
0
1
0
0
0
1
279
23.25
0
0
0
0
6
6
15
1.25
1
1
0
0
0
2
280.5
23.375
1
0
0
8
0
9
22.5
1.875
0
0
1
0
0
1
289.5
24.125
0
1
0
0
6
7
31.5
2.625
0
3
0
0
0
3
301.5
25.125
0
0
1
0
6
7
34.5
2.875
0
0
0
1
0
1
310.5
25.875
0
0
0
9
0
9
37.5
3.125
1
1
1
0
0
3
325.5
27.125
0
0
0
0
7
7
43.5
3.625
0
2
1
0
0
3
330
27.5
1
0
0
0
7
8
45
3.75
0
0
2
0
0
2
345
28.75
0
0
0
10
0
10
46.5
3.875
0
0
0
0
1
1
349.5
29.125
1
0
0
10
0
11
51
4.25
1
0
0
0
1
2
372
31
0
0
0
0
8
8
55.5
4.625
0
1
2
0
0
3
379.5
31.625
0
0
0
11
0
11
57
4.75
0
0
1
1
0
2
418.5
34.875
0
0
0
0
9
9
67.5
5.625
0
0
3
0
0
3
465
38.75
0
0
0
0
10
10
69
5.75
0
0
0
2
0
2
475.5
39.625
0
1
0
0
10
11
73.5
6.125
1
0
0
2
0
3
480
40
1
1
0
0
10
12
79.5
6.625
0
1
0
2
0
3
492
41
1
0
1
0
10
12
81
6.75
0
0
0
1
1
2
499.5
41.625
0
0
0
1
10
11
91.5
7.625
0
0
2
0
1
3
504
42
1
0
0
1
10
12
93
7.75
0
0
0
0
2
2
511.5
42.625
0
0
0
0
11
11
97.5
8.125
1
0
0
0
2
3
520.5
43.375
0
2
0
1
11
14
103.5
8.625
0
0
0
3
0
3
531
44.25
0
2
2
0
11
15
108
9
1
0
0
3
0
4
538.5
44.875
1
0
0
2
11
14
117
9.75
1
0
5
0
0
6
549
45.75
1
0
2
1
11
15
118.5
9.875
1
1
0
3
0
5
558
46.5
0
0
0
0
12
12
126
10.5
0
0
1
3
0
4
562.5
46.875
1
0
0
0
12
13
130.5
10.875
1
0
1
3
0
5
568.5
47.375
0
1
0
0
12
13
135
11.25
0
0
6
0
0
6
573
47.75
1
1
0
0
12
14
139.5
11.625
0
0
0
0
3
3
580.5
48.375
0
0
1
0
12
13
142.5
11.875
1
0
0
4
0
5
589.5
49.125
0
1
2
2
10
15
144
12
1
0
0
0
3
4
595.5
49.625
1
1
1
0
12
15
154.5
12.875
1
1
0
0
3
5
604.5
50.375
0
0
0
0
13
13
160.5
13.375
0
2
0
0
3
5
615
51.25
0
1
0
0
13
14
172.5
14.375
0
0
0
5
0
5
625.5
52.125
0
2
0
0
13
15
177
14.75
1
0
0
5
0
6
631.5
52.625
1
0
1
0
13
15
186
15.5
0
0
0
0
4
4
637.5
53.125
0
1
1
0
13
15
196.5
16.375
0
1
0
0
4
5
651
54.25
0
0
0
0
14
14
207
17.25
0
0
0
6
0
6
655.5
54.625
1
0
0
0
14
15
211.5
17.625
1
0
0
6
0
7
672
56
0
2
0
0
14
16
217.5
18.125
0
1
0
6
0
7
678
56.5
1
0
1
0
14
16
229.5
19.125
0
0
1
6
0
7
688.5
57.375
1
1
1
0
14
17
232.5
19.375
0
0
0
0
5
5
697.5
58.125
0
0
0
0
15
15
241.5
20.125
0
0
0
7
0
7
702
58.5
1
0
0
0
15
16
246
20.5
1
0
0
7
0
8
712.5
59.375
1
1
0
0
15
17
720
60
0
0
1
0
15
16
