How quickly do air purifiers make a difference?

PM2.5 levels drop within 30 minutes of turning on a properly sized purifier. Most people notice reduced allergy symptoms within one to three days of continuous use.

Do air purifiers help with wildfire smoke?

Yes, HEPA purifiers are highly effective against wildfire smoke particles. A properly sized unit can reduce indoor smoke particles by 80 to 90 percent.

Best Air Purifiers to Improve Indoor Air