Table 2.
PM2.5 | Intense three-in-one maximum μg/m3 | Micromotor maximum μg/m3 | Air turbine maximum μg/m3 | Slow speed maximum μg/m3 | Ultrasonic maximum μg/m3 |
---|---|---|---|---|---|
Without HVE | 8 | 11 | 10 | 10 | 8 |
With HVE | 6 | 6 | 9 | 5 | 6 |
Background | 6-8 | 6-8 | 6-8 | 6-8 | 6-8 |
% relative reduction above background | Results within background levels | 100 | 100 | 100 | Results within background levels |