Where does the air of your colleagues go?
How effective is really the ventilation in our workspaces?
It is already known that effective ventilation prevents airborne infection. But to get further answers and knowledge of where the exhaled air goes in an office, we performed a lots of lab measurements and verified CFD simulations (together with the University of Gävle).
Download and read the report here: CRE study (pdf)
Summary of the results from different measurements / simulation with mixed ventilation:
Summary from various measurements with InventiAir’s products:
Conclusion: The measurements confirm that a good ventilation flow in the room mixes the contaminants. They also state that the risk of inhaling contaminated and polluted air can be further reduced, with an optimized distribution of the air in the room.
The European industry association (REHVA) and the Swedish industry association (Svensk Ventilation) emphasize the importance of efficient ventilation. Something we fully support. However, we would like to emphasize that the efficiency of ventilation van vary, as has been shown by the results above.
“REHVA also explains why the concentration of small virus particles is relatively constant throughout the room where a carrier is present, and that this allows conventional ventilation to effectively dilute and remove them.”
The explanation for why the results differ:
Picture above: Visualizations of CFD simulations with spread of contamination with mixing technology (orange) and InventiAir’s optimized air distribution (blue). The contamination is distributed to the exhaust air (InventiAir) instead of spreading to the workplace next door.
“For us in InventiAir, it is a matter of course that pollution and contamination should not be helped by the ventilation to spread around different types of premises. This applies to all types of premises, such as offices, schools, hospitals, homes, etc., regardless of the requirements for cleanliness. Conventional ventilation has as a strategy to “mix” the new air with the old, so that a form of “dilution effect” of contamination and pollution occurs. It is far from optimal from an energy point of view and it is definitely not optimal from a health perspective!” – Martin Sellö