Evaporative humidifiers work differently, relying on wick filters doused with water that collect any minerals before the water vapor is distributed via a fan.

A humidifier is a machine that adds moisture to the air. The best way to determine if you need one is to understand a bit about humidity and humidifiers.

Air purifiers vs. humidifiers Air purifiers and humidifiers work in very different ways. Air purifiers are generally considered very helpful for environmental allergies.

Cool-mist humidifiers and warm-mist humidifiers create water vapor clouds of different temperatures, but cool-mist humidifiers are best if you’re using hard water.