Table of Contents
Advertisement
Maximum Allowable Exposed Vent Length in Unconditioned Space - - Meters (continued)
Unit Size
Uninsulated
Pipe Dia.
64
76
mm
-7
3.0
15.2
Winter
-18
3.0
6.1
Design
-29
3.0
3.0
Temp
°C
-40
3.0
1.5
NOTE: Maximum Equivalent Vent Length (MEVL) includes standard and concentric vent termination and does NOT include elbows.
Use Table 17 - Deductions from Maximum Equivalent Vent Length to determine allowable vent length for each application.
Unit Size
Pipe Dia. (in)
1 ½
0--- 2000
20
2001--- 3000
3001--- 4000
16
4001--- 4500
Altitude
4501--- 5000
15
(feet)
5001--- 6000
6001--- 7000
13
7001--- 8000
10
8001--- 9000
5
9001--- 10000
N/A
Unit Size
Pipe Dia.
38
(mm)
0--- 610
6.0
611--- 914
0.0
915--- 1219
4.8
1220--- 1370
Altitude
1371--- 1524
(meters)
4.5
1525--- 1829
1830--- 2134
3.9
2135--- 2438
3.0
2439--- 2743
1.5
2744--- 3048
NA
NOTES:
1. Inducer Outlet Restrictor disk (P/N 337683 ---401; 1.25 ---in. (32 mm) Dia.) available through Replacement Components required for no greater 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.
2. Inducer Outlet Restrictor disk (P/N 337683 ---402; 1.50 ---in. (38 mm) Dia.) available through Replacement Components required for no greater 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.
120,000 BTUH
3/8-in. Insulation
1/2-in. Insulation
102
64
76
102
64
12.2
3.0
22.9
28.9
3.0
4.6
3.0
16.8
13.7
3.0
3.0
10.7
7.6
3.0
3.0
7.6
4.6
3.0
Table 16 – Maximum Equivalent Vent Length - - Ft.
1
60,000
2
2 ½
3
1 ½
100
175
200
15
95
165
185
90
155
175
85
150
170
10
80
145
165
75
140
155
70
130
145
65
120
135
N/A
60
115
125
55
105
115
Maximum Equivalent Vent Length --- Meters
1
60,000
51
64
76
38
30.4
53.3
60.9
4.5
16.7
28.9
50.2
56.3
14.9
27.4
47.2
53.3
25.9
45.7
51.8
3.0
13.4
24.3
44.1
50.2
22.8
42.6
47.2
12.4
21.3
39.6
44.1
11.5
19.8
36.5
41.1
10.9
NA
18.2
35.0
38.1
10.0
16.7
32.0
35.0
Uninsulated
76
102
64
76
22.9
32.0
1.5
16.7
19.8
15.2
1.5
7.6
13.7
9.1
1.5
3.0
9.1
6.1
1.5
1.5
80,000
2
2 ½
3
4
55
130
175
200
125
165
185
49
115
155
175
150
165
44
110
145
160
41
100
135
150
38
125
140
90
36
120
125
33
80
110
115
N/A
30
75
100
105
80,000
51
64
76
102
39.6
53.3
60.9
6.0
38.1
50.2
56.3
4.5
0.0
35.0
47.2
53.3
45.7
50.2
33.5
44.1
48.7
3.0
30.4
41.1
45.7
38.1
42.6
27.4
36.5
38.1
24.3
33.5
35.0
NA
9.1
22.8
30.4
32.0
54
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
2
100,000
2
2 ½
3
4
2 ½
20
80
175
200
10
165
185
15
75
175
5
155
70
170
150
165
10
65
140
155
60
135
145
N/A
55
125
135
50
115
125
45
100
115
2
100,000
51
64
76
102
64
24.3
53.3
60.9
3.0
50.2
56.3
0.0
22.8
53.3
1.5
47.2
21.3
51.8
45.7
50.2
19.8
42.6
47.2
18.2
41.1
44.1
NA
16.7
38.1
41.1
15.2
35.0
38.1
13.7
30.4
35.0
76
102
19.8
38.1
19.8
18.3
15.2
12.2
35
7.6
120,000
3
4
75
185
70
175
65
165
160
60
155
50
140
46
130
43
120
39
115
120,000
76
102
22.8
56.3
21.3
53.3
19.8
50.2
48.7
18.2
47.2
15.2
42.6
14.0
39.6
13.1
36.5
11.8
35.0
Hide quick links:
Advertisement
Table of Contents
