Product FAQs


Can I run my unit without a filter?

Evaporative cool mist humidifiers cannot be run without the use of a wick filter. However, ultrasonic and warm mist humidifiers that use a water purification filter can be used without the filter.

Does water quality affect filter life?

Yes, absolutely. The harder the water, the shorter the filter life. This is because minerals will get trapped in the filter over time and cause the filter to lose its ability to wick.

How do I store wick filters?

If it is necessary to save the filter, make sure the the filter is completely dry before storing. If a wet filter is stored, it will grow mold and mildew while in storage.

What is the average filter life of a wick filter? How often should I change my filter? How do I know my filter needs to be changed?

We recommend you replace your filter every 4-6 weeks, depending on usage and hardness of water. In some evaporative cool mist humidifiers we have included a Filter Check® indicator that will indicate when the filter needs changing.

How do I know what filter to use for my humidifier?


Why does my wick filter turn colors?

Wick filters help remove the impurities found in general tap water. These impurities cause the filter to change color as they get trapped in the wick. As more and more minerals become trapped more of the filter will change color. Eventually the filter will no longer be operating the humidifier effectively, which means it is time to change the filter.