Humidifiers are a fantastic tool when you’ve got a cold or the flu, but if you’ve ever tried to shop for one, you probably became quickly overwhelmed.

Humidifiers, which blow water vapor or steam into the air, increase the moisture levels in a room and help combat stuffy noses, sore throats and dry skin, according to the Mayo Clinic.

There are several types, and all serve different purposes – though it’s hard to go wrong with any humidifier.

• Warm mist humidifier: This heats water until it boils and then emits steam. Some of these include mineral filters that trap water, and these need to be changed occasionally, adding an additional cost to consider. Many pediatricians caution against warm mist humidifiers for children, as they can be a burn risk, according to Consumer Reports.

• There are three kinds of humidifiers in the Cool Mist category: evaporative, ultrasonic and impeller. Evaporative humidifiers use a fan and blow air over a wet wick, and you’ll have to occasionally replace the wick for about $10. Ultrasonic humidifiers use a vibrating nebulizer to emit the water, and impeller humidifiers use a rotating disk.