Bryant EVOLUTION 987MA Product Data page 9
Modulating 4-way multipose, variable speed condensing gas furnace, series a
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MAXIMUM ALLOWABLE EXPOSED VENT PIPE LENGTH INSULATION TABLE - - FT. / M
Modulating
Winter
Furnace
Pipe Length
Design Temp
High Heat
in Ft. & M
°F (°C)
Input
20 (-10)
0 (-20)
60000
-20 (-30)
-40 (-40)
20 (-10)
0 (-20)
80000
-20 (-30)
-40 (-40)
20 (-10)
0 (-20)
100000
-20 (-30)
-40 (-40)
20 (-10)
0 (-20)
120000
-20 (-30)
-40 (-40)
* Pipe length (ft) specified for maximum pipe lengths located in unconditioned spaces. Pipes located in unconditioned space cannot exceed total allowable pipe
length calculated from Table 1 or 3.
† Insulation thickness based on R value of 3.5 per in.
Maximum Length of Uninsulated and Insulated Vent Pipe-Ft (M)
No Insulation
Pipe Diameter-in. (mm)
1.5
2.0
2.5
3.0
(38)
(51)
(64)
(76) (102)
Ft.
34.0
29.0
28.0
23.0
M
10.4
8.8
8.5
7.0
Ft.
14.0
9.0
7.0
0.0
M
4.3
2.7
2.1
0.0
Ft.
5.0
0.0
0.0
0.0
M
1.5
0.0
0.0
0.0
Ft.
0.0
0.0
0.0
0.0
M
0.0
0.0
0.0
0.0
Ft.
35.0
39.0
39.0
33.0
M
10.7
11.9
11.9
10.1
Ft.
22.0
16.0
14.0
7.0
M
6.7
4.9
4.3
2.1
Ft.
11.0
5.0
2.0
0.0
M
3.4
1.5
0.6
0.0
Ft.
4.0
0.0
0.0
0.0
M
1.2
0.0
0.0
0.0
Ft.
N/A
47.0
47.0
41.0
M
N/A
14.3
14.3
12.5
Ft.
N/A
21.0
19.0
12.0
M
N/A
6.4
5.8
3.7
Ft.
N/A
8.0
6.0
0.0
M
N/A
2.4
1.8
0.0
Ft.
N/A
1.0
0.0
0.0
M
N/A
0.3
0.0
0.0
Ft.
N/A
N/A
15.0
49.0
M
N/A
N/A
4.6
14.9
Ft.
N/A
N/A
15.0
17.0
M
N/A
N/A
4.6
5.2
Ft.
N/A
N/A
10.0
2.0
M
N/A
N/A
3.0
0.6
Ft.
N/A
N/A
1.0
0.0
M
N/A
N/A
0.3
0.0
3/8-in. (9.5 mm)
Pipe Diameter-in. (mm)
4.0
1.5
2.0
2.5
3.0
(38)
(51)
(64)
(76)
N/A
55.0
88.0
79.0
69.0
N/A
16.8
26.8
24.1
21.0
N/A
55.0
49.0
43.0
34.0
N/A
16.8
14.9
13.1
10.4
N/A
41.0
32.0
26.0
18.0
N/A
12.5
9.8
7.9
5.5
N/A
30.0
21.0
16.0
8.0
N/A
9.1
6.4
4.9
2.4
25.0
35.0
118.0 107.0
92.0
7.6
10.7
36.0
32.6
28.0
0.0
35.0
69.0
60.0
49.0
0.0
10.7
21.0
18.3
14.9
0.0
35.0
46.0
39.0
29.0
0.0
10.7
14.0
11.9
8.8
0.0
35.0
33.0
26.0
17.0
0.0
10.7
10.1
7.9
5.2
32.0
N/A
50.0
110.0 112.0
9.8
N/A
15.2
33.5
34.1
1.0
N/A
50.0
74.0
61.0
0.3
N/A
15.2
22.6
18.6
0.0
N/A
50.0
49.0
38.0
0.0
N/A
15.2
14.9
11.6
0.0
N/A
42.0
34.0
24.0
0.0
N/A
12.8
10.4
7.3
40.0
N/A
N/A
15.0
100.0 111.0
12.2
N/A
N/A
4.6
30.5
6.0
N/A
N/A
15.0
75.0
1.8
N/A
N/A
4.6
22.9
0.0
N/A
N/A
15.0
48.0
0.0
N/A
N/A
4.6
14.6
0.0
N/A
N/A
15.0
32.0
0.0
N/A
N/A
4.6
9.8
9
1/2-in. (12.7 mm)
Pipe Diameter-in. (mm)
4.0
1.5
2.0
2.5
3.0
(102)
(38)
(51)
(64)
(76)
N/A
55.0
104.0
93.0
81.0
N/A
16.8
31.7
28.3
24.7
N/A
55.0
60.0
52.0
42.0
N/A
16.8
18.3
15.8
12.8
N/A
50.0
40.0
33.0
24.0
N/A
15.2
12.2
10.1
7.3
N/A
37.0
28.0
22.0
13.0
N/A
11.3
8.5
6.7
4.0
76.0
35.0
130.0 125.0
109.0
23.2
10.7
39.6
38.1
33.2
35.0
35.0
83.0
72.0
60.0
10.7
10.7
25.3
21.9
18.3
16.0
35.0
57.0
48.0
37.0
4.9
10.7
17.4
14.6
11.3
4.0
35.0
41.0
34.0
24.0
1.2
10.7
12.5
10.4
7.3
93.0
N/A
50.0
110.0
132.0
28.3
N/A
15.2
33.5
40.2
45.0
N/A
50.0
89.0
74.0
13.7
N/A
15.2
27.1
22.6
23.0
N/A
50.0
60.0
48.0
7.0
N/A
15.2
18.3
14.6
10.0
N/A
50.0
43.0
32.0
3.0
N/A
15.2
13.1
9.8
N/A
N/A
15.0
100.0
33.8
N/A
N/A
4.6
30.5
57.0
N/A
N/A
15.0
90.0
17.4
N/A
N/A
4.6
27.4
32.0
N/A
N/A
15.0
59.0
9.8
N/A
N/A
4.6
18.0
17.0
N/A
N/A
15.0
41.0
5.2
N/A
N/A
4.6
12.5
4.0
(102)
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
90.0
27.4
45.0
13.7
23.0
7.0
11.0
3.4
110.0
33.5
57.0
17.4
32.0
9.8
18.0
5.5
131.0
39.9
70.0
21.3
42.0
12.8
25.0
7.6
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