Home humidifiers deliver moisture with one of four different types of technology and come in various sizes to suit different ...

The PureGuardian 10-Hour Ultrasonic Humidifier’s water tank is a measly .21 gallons (it’s meant to be portable). Based on that tank size, we doubt it would meet our requirement for continuous ...

This compact ultrasonic cool mist humidifier guards against problems caused by dry air for up to 30 hours between refills. The Pure Guardian K950R has a 0.8-gallon tank that provides this ...