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Table 7: Maximum Equivalent Pipe Length
Elevation Sea level - 2000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Elevation 2001 - 4000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Elevation 4001 - 5000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Elevation 5001 - 6000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Johnson Controls Ducted Systems
Max. equivalent Length (ft)
2
65
3
90
4
150
2
65
3
90
4
150
2
65
3
90
4
150
2
30
3
90
4
150
3
90
4
150
Max. equivalent Length (ft)
2
55
3
80
4
145
2
55
3
80
4
145
2
55
3
80
4
145
2
20
3
80
4
145
3
80
4
145
Max. equivalent Length (ft)
2
50
3
75
4
140
2
50
3
75
4
140
2
50
3
75
4
140
2
15
3
75
4
140
3
75
4
140
Max. equivalent Length (ft)
2
45
3
70
4
135
2
45
3
70
4
135
2
35
3
70
4
135
2
10
3
70
4
135
3
70
4
135
Elevation 6001 - 7000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Elevation 7001-8000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Elevation 8001-9000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
Elevation 9001-10000
Model Input (BTUH)
Pipe Size (in)
40,000
40,000
40,000
60,000
60,000
60,000
80,000
80,000
80,000
100,000
100,000
100,000
120,000
120,000
5750149-UIM-D-1219
Max. equivalent Length (ft)
2
40
3
65
4
130
2
40
3
65
4
130
2
30
3
65
4
130
2
5
3
65
4
130
3
65
4
130
Max. equivalent Length (ft)
2
35
3
60
4
125
2
35
3
60
4
125
2
25
3
60
4
125
2
NA
3
60
4
125
3
60
4
125
Max. equivalent Length (ft)
2
30
3
55
4
120
2
30
3
55
4
120
2
20
3
55
4
120
2
NA
3
55
4
120
3
55
4
120
Max. equivalent Length (ft)
2
25
3
50
4
115
2
25
3
50
4
115
2
15
3
50
4
115
2
NA
3
50
4
115
3
50
4
115
23
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