. >> reporter: professor kevin van den wymelenberg and others are the authors of a paper focused on minimizing viral transmission in buildings. >> we created a conceptual visualization of how the aerosols may be spreading in that room with a fan that is simply recirculating the air. whether it was an air conditioner or just a fan moving air. the visualization is really trying to articulate how the particles get caught up in the air and move around the space. >> reporter: the team created a second animation for the same room, only with an open window. >> what we were seeing is that with increased outside air exchange through the open window, particles deposit more quickly and then also be exhausted from the air stream more quickly. >> reporter: fresh air, fewer infections. >>> are people in the restaurant business going to have to consider in the future in your mind, what kind of air conditioning system they have and how it moves air? >> i think we're all going to be considering our air systems in buildings much more seriously moving forward. and i think restaurateurs will be included in that s

. >> reporter: professor kevin van den wymelenberg and others are the authors of a paper focused on minimizinguildings. >> we created a conceptual visualization of how the aerosols may be spreading in that room with a fan that is simply recirculating the air. whether it was an air conditioner or just a fan moving air. the visualization is really trying to articulate how the particles get caught up in the air and move around the space. >> reporter: the team created a second animation for the same room, only with an open window. >> what we were seeing is that with increased outside air exchange through the open window, particles deposit more