Do car air purifiers actually work?

Question

Accepted Answer

Yes, but size matters. A car cabin is only ~100 cubic feet, so even a small HEPA purifier can cycle the air multiple times per minute. Look for true HEPA (not ionic or ozone generators). The IQAir Atem Car cleans cabin air in under 2 minutes by independent testing.

Best Portable Car Air Purifiers 2026