Objective: Confirm that the EHPAD ventilation system will maintain acceptable levels of SARS-COV-2 concentration in the east wing, a future service dedicated to residents with COVID-19.
CTA air renewal of 3.0 vol/h
Air renewal provided by the CTA of 3.0 vol/h + Purifier with a nominal flow rate of 455m3/h
CTA air renewal of 6.0 vol/h
This study quantified the impact of two preventive measures on the risk of COVID-19 infection : the installation of an ai purifier in the infected resident’s bedroom and incrasing the air renewal rate to 6 ACPH.
In the case of a room adjacent to the patient’s bedroom:
– The air purifier in the patient’s room reduces infectious risk by 66% (scenario 2).
– Increasing air renewal in the patient’s room reduces infectious risk by 55% (scenario 3).
In the corridor:
– The air purifier in the patient’s room reduces infectious risk by 67% (scenario 2).
– At a 6 vol/h air renewal rate (scenario 3), the infectious risk is reduced by just 33%
1
The most effective measure to limit the propagation of the virus in other areas seems to be the use of a purifier in the patient’s room.
2
COVID-19 infected patients’ rooms should be located primarily to the southwest wing, in order to limit particulate matters transportation.
3
Balancing blow and return flows is essential to limite virus spreading risk in bedrooms and corridors.
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