Environment

Normal

Contaminated
Outside
Dusty

Extremely
Cold Weather
Climates

High
Humidity
Biogenic

Day Care Centers

2 wk

1 wk

2 wk

1 wk

Nursing Homes

1 mo

1 mo

1 mo

1 wk

Residences

2-persons, non-smoking

6-12 mo

2 mo

4-6 mo

4-6 mo

2-persons, with smoking

4 mo

2 mo

3 mo

4 mo

Young children

6 mo

1 mo

3 mo

3 mo

Young children w/ pets

3-6 mo

1 mo

2 mo

2 mo

Office Building

First floor

3-6 mo

2-4 mo

2-6 mo

2-6 mo

Higher floors

6-12 mo

2-6 mo

3-9 mo

3-9 mo

Food Services
Establishments

1 mo

1 wk

2 wk

2 wk

Commercial
(retail shops, banks)

3-6 mo

1 mo

2 mo

2 mo