Updating furnace filter

Offering a huge, 6-liter (1.5-gallon) tank that can provide more than 24 hours of operation, plus thoughtful features such as the ability to shut off the display at night, this ultrasonic humidifier replaces our older large-room pick, the SPT SU-4010.

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Most humidifiers require regular maintenance, including a thorough cleaning every one to three days. But be honest with yourself: Are you ready to be a “humidifier parent”?

If you know you’re not up for this level of regular cleaning and maintenance, you may end up with a breeding ground for germs.

It is a popular model on Amazon, but be warned that all warm-mist humidifiers have safety and running-cost concerns—and they don’t humidify a room any better than non-warm competitors.

With the help of a Ph D physicist, we tested the humidifiers in a climate-controlled space while regularly logging the temperature, humidity, and particle count (where applicable).

It performs very similarly to the Honeywell and is easy to clean because it also has no electronic components inside that touch water.