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Purely natural air flow [24] is usually a key factor in decreasing the spread of airborne diseases like tuberculosis, the frequent cold, influenza, meningitis or COVID-19. Opening doors and windows are very good means To optimize purely natural ventilation, which would make the risk of airborne contagion Considerably decrease than https://miloixdin.59bloggers.com/33164977/the-5-second-trick-for-hvac

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