NOTE: Maximum Equivalent Vent Length (MEVL) includes standard and concentric vent termination and does NOT include elbows. Use
Deductions from Maximum Equivalent Vent Length to determine allowable vent length for each application.
2
Unit Size
26,000
Pipe Dia.
1 ½
2
(in)
02000
70
200
20013000
65
190
30014000
60
175
40014500
55
160
Altitude
45015000
(feet)
50016000
50
145
60017000
45
135
70018000
40
120
80019000
35
110
30
95
900110000
2
Unit Size
26,000
Pipe Dia.
38
51
(mm)
0610
21.3 60.9
611914
19.8 57.9
9151219
18.2 53.3
Altitude
12201370
16.7 48.7
(meters)
13711524
15251829
15.2 44.1
18302134
13.7 41.1
21352438
12.1 36.5
24392743
10.6 33.5
27443048
9.1
28.9
1. 40K Inducer Outlet Restrictor disk (P/N 337683-401; 1.25-in. (32 mm) Dia.) shipped in the loose parts bag or available through Replacement Components required under 10-ft. (3 M)
TEVL in all orientations. Required for installations from 0 - 2000 ft. (0 to 610 M) above sea level. Failure to use an outlet restrictor may result in flame disturbances or flame sense
lock-out.
2. 26K (shipped in loose parts bag) & 60K Inducer Outlet Restrictor disk (P/N 337683-401; 1.25-in. (32 mm) Dia. available through Replacement Components) required for less than 5-ft.
(1.5 M) TEVL in downflow and horizontal orientations only. Required for installations from 0 - 2000 ft. (0 to 610 M) above sea level.
3.
120K & 140K Inducer Outlet Restrictor disk (P/N 337683-402; 1.50-in. (38 mm) Dia. available through
and horizontal orientations only. Required for installations from 0 - 2000 ft. (0 to 610 M) above sea level.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Uninsulated
51
64
76
102
12.2
12.2
10.7
9.1
6.1
4.6
3.0
1.5
3.0
1.5
1.5
100,000 BTUH
3/8-in. Insulation
76
102
51
64
76
102
4.6
3.0
6.1 16.8 13.7 10.7 6.1 19.8 16.7 13.7
1.5
6.1 10.7 9.1
6.1
6.1
7.6
6.1
3.0
*
140,000
BTUH*
3/8-in. Insulation
1/2-in. Insulation
102
64
76
102
64
15.2
1.5
19.8
32.0
1.5
4.6
1.5
19.8
15.2
1.5
1.5
1.5
13.7
9.1
1.5
1.5
9.1
6.1
1.5
1
40,000
60,000
1
1 ½
2
2 ½
2
2 ½
½
40
155
185
100
175
20
35
150
175
95
165
30
135
160
16
90
155
130
155
85
150
25
125
145
15
80
145
20
120
130
75
140
15
110
120
13
70
130
100
110
10
65
120
10
90
95
5
60
115
N/
5
80
85
55
105
A
Maximum Equivalent Vent Length - Meters
1
40,000
60,000
38
51
64
38
51
64
12.1
47.2
56.3
30.4
53.3
6.0
10.6
45.7
53.3
28.9
50.2
9.1
41.1
48.7
4.8
27.4
47.2
39.6
47.2
25.9
45.7
7.6
38.1
44.1
4.5
24.3
44.1
6.0
36.5
39.6
22.8
42.6
4.5
33.5
36.5
3.9
21.3
39.6
30.4
33.5
3.0
19.8
36.5
3.0
27.4
28.9
1.5
18.2
35.0
1.5
24.3
25.9
NA
16.7
32.0
80,000 BTUH
3/8-in. Insulation
38
51
64
76
4.6
15.2
27.4
22.9
4.6
15.2
13.7
10.7
4.6
10.7
9.1
6.1
4.6
7.6
6.1
4.6
1/2-in. Insulation
51
64
76
102
6.1 13.7 10.7 7.6
6.1
9.1
7.6
4.6
76
102
19.8 38.1
19.8 18.3
15.2 12.2
35
7.6
2
80,000
3
1 ½
2
2 ½
3
4
200
15
55
130
175
200
185
125
165
185
49
175
115
155
175
170
10
150
165
44
110
165
145
160
155
41
100
135
150
145
38
125
140
90
135
36
120
125
N/A
125
33
80
110
115
115
30
75
100
105
2
80,000
76
38
51
64
76
102
60.9
4.5
16.7 39.6 53.3 60.9 6.0 24.3 53.3 60.9
56.3
38.1 50.2 56.3
14.9
53.3
35.0 47.2 53.3
51.8
3.0
45.7 50.2
13.4 33.5
50.2
44.1 48.7
47.2
12.4 30.4 41.1 45.7
44.1
11.5
38.1 42.6
27.4
41.1
10.9
36.5 38.1
NA
38.1
10.0 24.3 33.5 35.0
35.0
9.1
22.8 30.4 32.0
Replacement
12
1/2-in. Insulation
102
38
51
19.8
4.6
15.2
9.1
4.6
15.2
4.6
4.6
12.2
1.5
4.6
9.1
120,000 BTUH
3/8-in.
Uninsulated
Insulation
64
76
102
64
76
3.0
15.2 12.2
3.0
22.9 28.9
3.0
6.1
4.6
3.0
16.8 13.7
3.0
3.0
3.0
10.7
3.0
1.5
3.0
7.6
3
100,000
120,000
2
2 ½
3
4
2 ½
3
20
80
175
200
75
10
165
185
70
15
75
175
5
65
155
70
170
150
165
60
10
65
140
155
60
135
145
50
N/A
55
125
135
46
N/
50
115
125
43
A
45
100
115
39
3
100,000
120,000
51
64
76
102
64
76
22.8 56.3 1.5
3.0
50.2 56.3
21.3 53.3
4.5 22.8
53.3
1.5
19.8 50.2
47.2
21.3
51.8
45.7 50.2
18.2
3.0
19.8
42.6 47.2
18.2 41.1 44.1
NA
15.2 42.6
16.7 38.1 41.1
14.0 39.6
NA
15.2 35.0 38.1
13.1 36.5
13.7 30.4 35.0
11.8 35.0
Components) required for less than 5-ft. (1.5 M) TEVL in downflow