air purifier: Things to keep in mind before buying air purifier

Delhi AQI has remained in the
Delhi AQI has remained in the 'very poor' category for over a week. Here is what you should keep in mind before buying air purifiers.

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Trying to decide on an air purifier. I'm thinking of either buying 2-3 of the Coway airmega AP-1512 or one of the Coway Airmega 400. Not sure what the difference is between

Four things to keep in mind before you purchase air purifier