How quickly does an air purifier clear pollen?

A properly sized HEPA purifier clears a room in 15-30 minutes. Run it continuously during allergy season rather than turning it on and off. The filter only works when air is flowing through it.

Should I run my air purifier all day?

Yes. During allergy season, run it 24/7 on auto mode. The energy cost is minimal (equivalent to a light bulb) and the health benefit is significant. Turn it to high after opening doors or windows.

Best Tech for Allergy Season 2026