Environment:

Normal

Contaminated Outside, Dusty

Extremely Cold Weather Cliamtes

High Humidity Biogenic

Day
Care Center

2 weeks

1 week

2 weeks

1 week

Nursing Home

1 month

1 month

1 month

1 week

Residence

(2
persons, non-smoking)

6-12
months

2 months

4-6
months

4-6
months

(2
persons, smoking)

4 months

2 months

3 months

4 months

(young
children)

6 months

1 month

3 months

4 months

(young
children with pets)

3-6
months

1 month

2 months

2 months

Office Building

(ground floor)

3-6
months

1-4
months

2-6
months

2-6
months

(higher floors)

6-12
months

2-6
months

3-9
months

3-9
months

Food Service Establishment

1 month

1 week

2 weeks

2 weeks

Commercial Building

3-6
months

1 month

2 month

2 months