Environmental Engineering Reference
In-Depth Information
Table 11.1
Relationship Between Building/Work-Related Symptoms and Ventilation System Type
% with symptoms
Sickness
index
Dry
eyes
Itchy
eyes
Runny
nose
Blocked
nose
Dry
throat
Difficulty
breathing
Chest
tightness
Building ventilation type
Lethargy
Headache
Flu
Natural (N = 442)
2.49
18
22
19
40
36
50
39
15
6
6
Mechanical (N = 944)
2.18
20
20
16
32
33
42
33
14
6
5
Local induction/fan coil
(N = 508)
3.81
34
33
29
58
56
66
52
28
14
11
Central induction/fan coil
(N = 1095)
3.70
31
32
28
57
54
68
47
29
12
14
“All air” (N = 1384)
3.12
31
29
21
45
46
56
43
25
9
8
Whole group (N = 4374)
3.10
27
28
23
47
46
57
43
23
9
9
Source:
From Burge, S. et al.,
Ann. Occup. Hyg
., 31, 493, Elsevier Science Ltd., Amsterdam, Netherlands, 1987. With permission.
