I tested 12 essential oil diffusers to compare their scent quality, design, ease of use and functionality. Three emerged as the best for most people.

Right now, Amazon is selling this $48 HealthSmart Cool Mist Humidifier for only $22. Plus, it doubles as an essential oil diffuser, which means you can get two machines for the price of one at a ...

Hard water has an abundance of minerals and due to the processes that humidifiers use to vaporize water, all of those minerals can potentially wind up as dust.