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Absolute humidity (AH) with Hygrobac S or Thermovent HEPA placed at Site 1 or Site 2. AH was significantly higher when Hygrobac S (closed circle)(*p < 0.05) was placed at Site 1 than at Site 2, and when Thermovent HEPA (open circle)(**p < 0.05) was placed at Site 1 than at Site 2. Patient N = 10. Data presented as mean ± SD.
