Sue Roaf: Over 200 scientists, including myself, signed a letter that was published in the journal Clinical Infectious Diseases on July 6 2020 saying that COVID is not only spread by touch and droplets sprayed from the mouth and nose but, importantly, via a third route too. The third infection pathway is in very tiny airborne particles of liquid and material, known as aerosols, that stay suspended in the air for a long time. If the virus attaches to these tiny particles, it can float on the air and spread much further. An effective way to reduce this spread is to purge the air containing those aerosols from rooms by simply opening the windows, as shown below. Building designers today often don’t understand that they have been cheated by not being taught how to ventilate buildings naturally. Modern, fast, cheap, design has three key drivers. One, the architectural fantasy that their main professional contribution to society is in sculptural art. Two, what the building regulations require. And three, the limits imposed on designers by the almost universal use of flawed building simulation models that steer designers away from naturally ventilating buildings.
The Conversation 6t Aug 2020 read more »