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SUPPORT / INDALO®
Confirm that the EHPAD ventilation system will ensure that acceptable SARS-COV-2 concentration thresholds are maintained in the east wing, the future department dedicated to residents affected by COVID-19.
Infection risk over a week
Three studied scenarios
Scenario 1 :
Air renewal by AHU :
3,0 ACPH
Scenario 2 :
Air renewal by AHU :
3,0 ACPH
+ Purifier with 455m3/h nominal flow rate
Scenario 3 :
Air renewal by AHU:
6,0 ACPH
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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