INSTALLATION INSTRUCTIONS
Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE
440 01 4001 05
59
Specifications subject to change without notice.
Table 18
Maximum Allowable Exposed Vent Lengths in Unconditioned Space
−
Two
−
Stage
Maximum Length of Uninsulated and Insulated Vent Pipe-Ft (M)
(F/G)9MVT
&
(F/G)9MXT
High Heat
Input
Winter
Design
Temp
°
F (
°
C)
Pipe Length
in Ft. & M
No Insulation
3/8-in. (9.5 mm)
1/2-in. (12.7 mm)
Pipe Diameter
−
in. (mm)
Pipe Diameter
−
in. (mm)
Pipe Diameter
−
in. (mm)
1.5
2.0
2.5
3.0
4.0
1.5
2.0
2.5
3.0
4.0
1.5
2.0
2.5
3.0
4.0
(38)
(51) (64) (76) (102)
(38)
(51)
(64)
(76) (102) (38)
(51)
(64)
(76) (102)
40,000
20 (-10)
Ft.
40.0 35.0 35.0 N/A
N/A
50.0 104.0 94.0
N/A
N/A
50.0 122.0 110.0 N/A
N/A
M
12.2 10.7 10.7 N/A
N/A
15.2
31.7 28.7
N/A
N/A
15.2 37.2 33.5
N/A
N/A
0 (-20)
Ft.
19.0 14.0 12.0 N/A
N/A
50.0
61.0 54.0
N/A
N/A
50.0 74.0 65.0
N/A
N/A
M
5.8
4.3
3.7 N/A
N/A
15.2
18.6 16.5
N/A
N/A
15.2 22.6 19.8
N/A
N/A
-20 (-30)
Ft.
9.0
3.0
1.0 N/A
N/A
50.0
41.0 35.0
N/A
N/A
50.0 51.0 43.0
N/A
N/A
M
2.7
0.9
0.3 N/A
N/A
15.2
12.5 10.7
N/A
N/A
15.2 15.5 13.1
N/A
N/A
-40 (-40)
Ft.
3.0
0.0
0.0 N/A
N/A
39.0
29.0 23.0
N/A
N/A
48.0 37.0 30.0
N/A
N/A
M
0.9
0.0
0.0 N/A
N/A
11.9
8.8
7.0
N/A
N/A
14.6
11.3
9.1
N/A
N/A
60,000
20 (-10)
Ft.
30.0 51.0 51.0 45.0 N/A
30.0 135.0 138.0 120.0 N/A
30.0 135.0 162.0 141.0 N/A
M
9.1
15.5 15.5 13.7 N/A
9.1
41.1 42.1 36.6
N/A
9.1
41.1 49.4 43.0
N/A
0 (-20)
Ft.
30.0 24.0 23.0 16.0 N/A
30.0
93.0 82.0 69.0
N/A
30.0 111.0 98.0 83.0
N/A
M
9.1
7.3
7.0
4.9
N/A
9.1
28.3 25.0 21.0
N/A
9.1
33.8 29.9 25.3
N/A
-20 (-30)
Ft.
18.0 11.0 9.0
1.0
N/A
30.0
65.0 56.0 44.0
N/A
30.0 79.0 68.0 55.0
N/A
M
5.5
3.4
2.7
0.3
N/A
9.1
19.8 17.1 13.4
N/A
9.1
24.1 20.7 16.8
N/A
-40 (-40)
Ft.
10.0
3.0
0.0
0.0
N/A
30.0
48.0 40.0 29.0
N/A
30.0 59.0 50.0 38.0
N/A
M
3.0
0.9
0.0
0.0
N/A
9.1
14.6 12.2
8.8
N/A
9.1
18.0 15.2
11.6
N/A
80,000
20 (-10)
Ft.
20.0 64.0 64.0 56.0 47.0
20.0
70.0 173.0 150.0 125.0 20.0 70.0 175.0 177.0 147.0
M
6.1
19.5 19.5 17.1 14.3
6.1
21.3 52.7 45.7 38.1
6.1
21.3 53.3 53.9
44.8
0 (-20)
Ft.
20.0 32.0 30.0 22.0 11.0
20.0
70.0 104.0 87.0 67.0 20.0 70.0 124.0 104.0 82.0
M
6.1
9.8
9.1
6.7
3.4
6.1
21.3 31.7 26.5 20.4
6.1
21.3 37.8 31.7
25.0
-20 (-30)
Ft.
20.0 17.0 14.0 6.0
0.0
20.0
70.0 71.0 57.0 40.0 20.0 70.0 86.0 71.0
52.0
M
6.1
5.2
4.3
1.8
0.0
6.1
21.3 21.6 17.4 12.2
6.1
21.3 26.2 21.6
15.8
-40 (-40)
Ft.
15.0
7.0
5.0
0.0
0.0
20.0
61.0 52.0 40.0 24.0 20.0 70.0 64.0 50.0
33.0
M
4.6
2.1
1.5
0.0
0.0
6.1
18.6 15.8 12.2
7.3
6.1
21.3 19.5 15.2
10.1
100,000
20 (-10)
Ft.
N/A
25.0 79.0 70.0 59.0
N/A
25.0 110.0 186.0 155.0 N/A
25.0 110.0 219.0 182.0
M
N/A
7.6 24.1 21.3 18.0
N/A
7.6
33.5 56.7 47.2
N/A
7.6
33.5 66.8
55.5
0 (-20)
Ft.
N/A
25.0 40.0 31.0 19.0
N/A
25.0 110.0 109.0 86.0
N/A
25.0 110.0 131.0 104.0
M
N/A
7.6 12.2 9.4
5.8
N/A
7.6
33.5 33.2 26.2
N/A
7.6
33.5 39.9
31.7
-20 (-30)
Ft.
N/A
23.0 21.0 13.0
0.0
N/A
25.0 91.0 74.0 54.0
N/A
25.0 110.0 90.0
68.0
M
N/A
7.0
6.4
4.0
0.0
N/A
7.6
27.7 22.6 16.5
N/A
7.6
33.5 27.4
20.7
-40 (-40)
Ft.
N/A
13.0 10.0 1.0
0.0
N/A
25.0 68.0 53.0 35.0
N/A
25.0 83.0 66.0
46.0
M
N/A
4.0
3.0
0.3
0.0
N/A
7.6
20.7 16.2 10.7
N/A
7.6
25.3 20.1
14.0
120,000
20 (-10)
Ft.
N/A
N/A 15.0 85.0 73.0
N/A
N/A
15.0 100.0 190.0 N/A
N/A
15.0 100.0 224.0
M
N/A
N/A
4.6 25.9 22.3
N/A
N/A
4.6
30.5 57.9
N/A
N/A
4.6
30.5
68.3
0 (-20)
Ft.
N/A
N/A 15.0 41.0 29.0
N/A
N/A
15.0 100.0 109.0 N/A
N/A
15.0 100.0 131.0
M
N/A
N/A
4.6 12.5
8.8
N/A
N/A
4.6
30.5 33.2
N/A
N/A
4.6
30.5
39.9
-20 (-30)
Ft.
N/A
N/A 15.0 20.0
7.0
N/A
N/A
15.0 94.0 71.0
N/A
N/A
15.0 114.0 88.0
M
N/A
N/A
4.6
6.1
2.1
N/A
N/A
4.6
28.7 21.6
N/A
N/A
4.6
34.7
26.8
-40 (-40)
Ft.
N/A
N/A 15.0 7.0
0.0
N/A
N/A
15.0 69.0 48.0
N/A
N/A
15.0 85.0
62.0
M
N/A
N/A
4.6
2.1
0.0
N/A
N/A
4.6
21.0 14.6
N/A
N/A
4.6
25.9
18.9
International Comfort Products
PO Box 128
Lewisburg, TN 37091 USA