Duct Sizing Guide; Table 17 - Duct Sizing Guide - Maritime Geothermal Nordic PC Series Installation And Service Manual

TABLE 17 - Duct Sizing Guide (external static of 0.20" H
Minimum
Airflow Diameter
Duct Area
(cfm)
(sq.in)
37 20
63 20
100 28
152 38
212 50
226 50
277 64
304 64
393 79
411 113
655 113
680 154
995 154
1325 201
1450 201
1750 254
2000 254
2250 314
2600 314
2900 380
3400 380
3600 452
4300 452
5250 531
6125 616
6500 616
7250 707
7800 707
8500 804
9200 804
9800 908
10900 908
ISSUE 03: 1-Oct-2021
Rectangular Equivalents (in)
(in)
5 2.25 x 10 3 x 8
5 2.25 x 10 3 x 8
6 3.25 x 10 4 x 8
7 3.25 x 14 4 x 11
8 4 x 15 5 x 12
8 4 x 15 5 x 12
9 5 x 15 6 x 12
9 5 x 15 6 x 12
10 6 x 15 7 x 13
12 7 x 18 8 x 16
12 7 x 18 8 x 16
14 8 x 22 9 x 19
14 8 x 22 9 x 19
16 8 x 30 10 x 22
16 8 x 30 10 x 22
18 8 x 40 10 x 30
18 8 x 40 10 x 30
20 10 x 38 12 x 30
20 10 x 38 12 x 30
22 12 x 36 14 x 30
22 12 x 36 14 x 30
24 14 x 38 16 x 32
24 14 x 38 16 x 32
26 16 x 38 18 x 32
28 18 x 38 20 x 34
28 18 x 38 20 x 34
30 20 x 40 22 x 38
30 20 x 40 22 x 38
32 22 x 40 24 x 38
32 22 x 40 24 x 38
34 24 x 42 25 x 40
34 24 x 42 25 x 40
28 x 40 30 x 36
30 x 42 32 x 38
30 x 45 34 x 40
O)
2
3.5 x 6 4 x 5.5 5 x 5
3.5 x 6 4 x 5.5 5 x 5
5 x 6 5.5 x 5.5 6 x 6
5 x 8.5 6 x 7 6.5 x 6.5
6 x 10 7 x 8 8 x 8
6 x 10 7 x 8 8 x 8
7 x 10 8 x 9 8.5 x 8.5
7 x 10 8 x 9 8.5 x 8.5
8 x 11 9 x 10 9.5 x 9.5
9 x 14 10 x 12 11 x 11
9 x 14 10 x 12 11 x 11
10 x 17 11 x 15 12 x 14
10 x 17 11 x 15 12 x 14
12 x 18 14 x 16 15 x 15
12 x 18 14 x 16 15 x 15
12 x 24 14 x 20 16 x 17
12 x 24 14 x 20 16 x 17
14 x 26 16 x 22 18 x 19
14 x 26 16 x 22 18 x 19
16 x 26 18 x 23 20 x 20
16 x 26 18 x 23 20 x 20
18 x 28 20 x 25 22 x 22
18 x 28 20 x 25 22 x 22
20 x 30 22 x 24 24 x 24
22 x 30 24 x 28 26 x 26
22 x 30 24 x 28 26 x 26
24 x 32 26 x 30 28 x 28
24 x 32 26 x 30 28 x 28
26 x 34 28 x 32 30 x 30
26 x 34 28 x 32 30 x 30
26 x 38 28 x 34 30 x 32
26 x 38 28 x 34 30 x 32
32 x 34 33 x 33
34 x 36 35 x 35
36 x 38 37 x 37
Page 21
Return Air
Diameter
(in)
` 5
6
7
8
9
10
10
12
12
12
14
13 x 13 14
13 x 13 16
18
20
16.5 x 16.5 20
16.5 x 16.5 22
18.5 x 18.5 22
18.5 x 18.5 24
24
26
26
28
30
32
34
34
36
36
38
31 x 31 38
31 x 31 40
002291MAN-03
Airflow
(L/s)
17
30
47
72
100
107
131
143
185
194
309
321
470
625
684
826
944
1062
1227
1369
1605
1699
2029
2478
2891
3068
3422
3681
4012
4342
4625
5144