Leakage factor from a table – Retrotec Commercial 441 and 451 DucTester User Manual
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©Retrotec Inc. 2015
Leakage Factor from a table
Test
Pressure,
in WC
Leakage Factor, F in CFM/100 square feet
Class 3 Class 6 Class 12
Class 24
Class 48
0.05
0.4
0.9
1.7
3.4
6.7
0.10
0.7
1.3
2.7
5.4
10.7
0.20
1.1
2.1
4.2
8.4
16.8
0.30
1.4
2.7
5.5
11.0
21.9
0.40
1.7
3.3
6.6
13.2
26.4
0.50
1.9
3.8
7.6
15.3
30.6
0.60
2.2
4.3
8.6
17.2
34.4
0.70
2.4
4.8
9.5
19.0
38.1
0.80
2.6
5.2
10.4
20.8
41.5
0.90
2.8
5.6
11.2
22.4
44.8
1
3
6
12
24
48
1.5
3.9
7.8
15.6
31.2
62.4
2.0
4.7
9.4
18.8
37.7
75.4
2.5
5.4
10.9
21.7
43.4
86.8
3.0
6.1
12.2
24.5
49.0
98.0
3.5
6.7
13.6
27.1
54.2
108.5
4.0
7.4
14.8
29.5
59.0
118.1
4.5
8.0
16.0
5.0
8.6
17.1
5.5
9.1
18.2
6.0
9.6
19.2
7.0
10.6
21.2
8.0
11.6
23.2
9.0
12.5
25.0
10.0
13.4
26.8
11.0
14.3
28.5
Table 6 Leakage Factor