New Delhi: As Delhi’s air quality dips once again into the ‘severe’ category, air purifiers have become the talk of every household. With the city’s AQI crossing 400 at several monitoring stations this week, many people are rushing to buy one, but end up lost in technical jargon, confusing filters, and inflated coverage claims.

Choosing an air purifier can feel like navigating a maze of specs, prices, and promises. Here’s a clear explainer on what matters before you bring one home.

How air purifiers work

Air purifiers clean indoor air by sucking it through filters and blowing out cleaner air. Inside, the device typically has:

Pre-filter: traps dust, pet hair, and lint.

HEPA filter: captures very fine particles such as PM2.5, pollen, and mold.

Activated carbon filter: absorbs smok

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