Cleaning Frequency Guideline
| Environment | Normal | Contaminated Outside, Dusty |
Extremely Cold Weather |
High Humidity Biogenic |
| Day Care Center | 2 wk | 1 wk | 2 wk | 1 wk |
| Nursing Home | 1 mo | 1 mo | 1 mo | 1 wk |
| Residence (2 persons, nonsmoking) |
6 – 12 mo | 2 mo | 4 – 6 mo | 4 – 6 mo |
| (2 persons, nonsmoking) | 4 mo | 2 mo | 3 mo | 4 mo |
| (young children) | 6 mo | 1 mo | 3 mo | 3 mo |
| (young children with pets) | 3 – 6 mo | 1 mo | 2 mo | 2 mo |
| Office Building (ground floor) |
3 – 6 mo | 1 – 4 mo | 2 – 6 mo | 2 – 6 mo |
| (higher floors) | 6 – 12 mo | 2 – 6 mo | 3 – 9 mo | 3 – 9 mo |
| Food Service Establishment |
1 mo | 1 wk | 2 wk | 2 wk |
| Commercial (retail shop, bank) |
3 – 6 mo | 1 mo | 2 mo | 2 mo |