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Why is 50 percent relative humidity so critical?

April 26, 2017critical humidity relative

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Why is 50 percent relative humidity so critical?

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The survival of adult dust mites is limited to 4 to 11 days in relative humidities below 50 percent. Dust mites in the protonymph stage, however, can survive in this dormant larval stage for several months waiting for high humidity conditions to return.