Some cool-mist humidifiers work by flinging water at a vaporizer, but our favorite kind uses a piezoelectric transducer. These work by using high-frequency sound waves to pound the surface of the ...

The best humidifiers are designed to put moisture into the air—particularly helpful during the dry winter months—but as you shop for one of these appliances, you’ll find that there are multiple types ...

While humidifiers provide real relief, many people aren’t entirely sure how they work or how to use them safely. Here’s what to know.