Air Treatment

Humidifiers and purifiers do different jobs, so it's worth being clear on which problem you're solving before you choose. Humidifiers add moisture to indoor air, which is often used in centrally heated homes or during drier months; purifiers are built to filter the air in a room.

Room size matters too — a unit meant for a small bedroom won't necessarily suit an open-plan living space, so check the product details for the area it's designed to cover.