Filters

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.

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.

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.

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.

SKU	What type of Humidifier is it?	What room size?	What Filter?
HUL2622W-UM	Ultrasonic		No Filter Needed
HWM5850MM-UM	Warm Mist		No Filter Needed
HUL8000-TUM	Warm & Cool Mist		No Filter Needed
HM1300-NU	Cool Mist		Type A Filter
HWM6008-NUM	Warm Mist		No Filter Needed
HCM730-TUM	Cool Mist		Two Type E Filters
HCM730-WUM	Cool Mist		Two Type E Filters
HM3855L-UM	Cool Mist		Type D Filter
HM2610-TUM	Ultrasonic		No Filter Needed
HM5100-UM	Cool Mist		Type A Filter
HUL2723B-UM	Ultrasonic		No Filter Needed
HM500TG1-UM	Ultrasonic		No Filter Needed
HUL2425D-WTU	Ultrasonic		No Filter Needed
HM495-UC	Ultrasonic		No Filter Needed
HWM6000-NUM	Warm Mist		No Filter Needed
HM1701-NU	Cool Mist		Type A Filter

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.