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Share: Many studies have shown that dry indoor air is a significant contributing factor to the rise of seasonal respiratory illness. A group of 17 internationally recognised scientists has called upon the UK Government to implement a minimum lower limit of indoor humidity in public buildings to protect against respiratory infection and mitigate the risk of future pandemics. The scientists submitted an open letter in response to a consultation invited by the Ministry of Housing, Communities & Local Government, on a recently proposed update to indoor ventilation regulations. Many of the scientists supporting the letter have directly studied and written papers on the impact of indoor humidity on aerosol transmission and respiratory infections. Their letter states that UK public buildings should be maintaining indoor humidity at above 40% relative humidity (%RH), because below this level:

United statesUnited kingdomDerek clements croomeAlison lancasterStephanie taylorProfessor emeritus at university of readingInstitution of building services engineerIntelligent buildings groupSchool of the built environmentHarvard medical school infection control consultantCompany nameHarvard medical schoolNatural ventilation for infection control in healthProfessor at queen mary university londonEpidemic taskBritish standards institution