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Tag: aerosol
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The world’s largest cooling project?
New research suggests that refreezing the Earth’s poles by reducing incoming sunlight would be a feasible and cheap approach to addressing melting ice and rising sea levels. In what might be the world’s largest cooling effort, scientists proposed spraying microscopic aerosol particles into the atmosphere above the poles via high-flying jets. According to new research […]
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New modelling of aerosol movement in HVAC systems
A new Australian study published in the latest issue of Ecolibrium has sought to determine the potential for droplets expelled from people when sneezing or coughing to propagate through a typical HVAC system. “The current pandemic has forced the HVAC community to look closely at the systems we use in buildings,” says co-author and LCI […]
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COVID-19 forcing a rethink on ventilation
Over the past few weeks, as the world registers more outbreaks of COVID-19, the attention on aerosol transmission of the virus has intensified. Researchers at the University of Florida have now made an important breakthrough. The team isolated viable virus from aerosols collected in a hospital room dedicated to two patients with COVID-19. The air […]
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‘Watching brief’ on airborne COVID-19
The World Health Organization (WHO) has acknowledged growing concerns surrounding the airborne transmission of the coronavirus, following the publication of an open letter addressed to the Geneva-based agency, but says more evidence is still required. Since the beginning of the pandemic, the organisation has advised that the virus is primarily spread through large respiratory droplets […]
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COVID-19 likely to be airborne, claim 239 experts
More than 200 scientists from over 30 countries have signed an open letter urging the World Health Organization (WHO) to take the role of airborne spread of COVID-19 more seriously. Published in the Clinical Infectious Diseases journal, the letter titled “It is Time to Address Airborne Transmission of COVID-19” challenges the view held by the […]
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Opinion: Can HVAC systems spread COVID-19?
By Craig Roussac, M.AIRAH. All buildings are created for people, and building owners must ensure they are safe. But unfortunately, as with most things in life, there is no guidebook setting out the “ideal” way to achieve that outcome. This is especially true in a pandemic. Over recent days, research has been published in the journal Nature that […]