How to pick the right air purifier for your room: From CADR to room size, here’s a simple guide to getting cleaner air at home

Selecting the right air purifier hinges on matching its capacity to your room size. Experts recommend the ‘two-thirds rule,’ where the smoke CADR should be at least two-thirds of your room’s area. Consider higher CADR for taller rooms or open spaces, and aim for 4-5 Air Changes Per Hour (ACH) for optimal air quality, especially for allergy sufferers.