The Best Electrostatic Air Purifier | December 2020
2020-7-1 · If you do opt for an electrostatic air purifier that emits ozone, avoid confining it to a closed-off small room. To qualify as true HEPA, a filter must pass a test that demonstrates it can clean at least 99.97% of airborne particles that are as small as 0.3 microns.
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