Table 3.
Decay constants for 0.3 μm particles and time needed to remove 95 % and 100 % aerosol particles accumulated from incense burn without room ventilation and with the portable air cleaner off and on.
| RM # | Qe (#/m3) |
ACHpac | Ko | Kpac | Time to 95 % removal |
Time to 100 % removal |
|||
|---|---|---|---|---|---|---|---|---|---|
| pac off | pac on | pac off | pac on | pac off | pac on | ||||
| 022 | 7.8 × 107 | 6.3 × 107 | 18 | 0.4 | 20.2 | >30 | 8 | >30 | 9 |
| 031 | 7.3 × 107 | 6.0 × 107 | 16 | 1.1 | 16.8 | >30 | 9 | >30 | 11 |
| 032 | 6.6 × 107 | 3.4 × 107 | 22 | −0.4 | 23.2 | >30 | 5 | >30 | 5 |
| 033 | 5.9 × 107 | 5.4 × 107 | 15 | −0.6 | 14.7 | >30 | 9 | >30 | 9 |
| Mean | 6.9 × 107 | 5.2 × 107 | 17.5 | 0.1 | 18.7 | – | 8 | – | 9 |
| SD | 8.3 × 106 | 1.3 × 107 | 3.2 | 0.8 | 3.7 | – | 2 | – | 3 |
Qe– number of 0.3 μm particles per cubic meter (#/m3) accumulated from 5 min of incense burn with portable air cleaner (pac) off or on. ACHpac – equivalent air change per hour provided by the portable air cleaner. Ko – decay constants with portable air cleaner off. Kpac – decay constants with portable air cleaner on.