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JOURNAL REPORTS ON CORONAVIRUS/ELEVATORS STUDY

The professional journal Indoor Air published a report on September 23 detailing an investigation into how long aerosol droplets of the coronavirus that causes COVID-19 persist in hospital elevators and offered specific measures to reduce the risk of transmitting the disease. The investigators, funded by the University of Amsterdam, found that it took 12-18 min for the number of particles to diminish 100-fold, both in medium-sized and large elevator cars, but that time was reduced significantly when the doors were left open. As a result of the tests, the authors offered suggestions like adjusting the doors so they stay open longer and mechanically altering ventilation systems. Rather than exhausting air through the top of the car into the hoistway (as is the case in many hospital elevators), the proposed alteration draws in fresh, filtered air from the hoistway. They also suggested extending the length of time ventilation fans operate after the car has gone idle.

Image credit: by Gerd Altmann for Pixabay

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