Viroscientists in Rotterdam, The Netherlands demonstrate in ferret study that SARS-CoV-2 can remain infectious while travelling through air ducts with multiple right angles.

Kutter, Jasmin S., de Meulder, Dennis et al. 2020. “SARS-CoV and SARS-CoV-2 are transmitted through the air between ferrets over more than one meter distance.” BioRxiv, October 19, 2020.

Ferret Study Reinforces Role of Aerosols in SARS-CoV-2 Spread
Using an elaborate apparatus, researchers find that the virus spreads via aerosolized particles between ferrets more than a meter apart.

https://www.the-scientist.com/news-opinion/ferret-study-reinforces-role-of-aerosols-in-sars-cov-2-spread-68094