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A member asked:

When is it necessary to use filters for cool mist humidifiers?

A doctor has provided 1 answer
Dr. Martin Fried answered

Specializes in Nutrition

Filters: Filters may help remove impurities in water - Some filters are treated with an antimicrobial agent to inhibit the growth of mold in humidifiers.

Answered 7/15/2014

3.9k views

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