Table 5 Leading organizations/societies recommendations for HVAC system in the management of COVID-19 patients [updated till 20 March 2020]
From: Heating, ventilation and air conditioning (HVAC) in intensive care unit
| Â | Name of the organization/society (reference) | |||
|---|---|---|---|---|
CDC [47] | ESICM/SCCM [50] | ECDC [51] | ||
Pressurization | Negative | Negative | Negative | No mention |
Temperature | No mention | No mention | No mention | No mention |
Relative humidity | No mention | No mention | No mention | No mention |
Air change (outside air/total) per hour (ACH) | Minimum of 6, while 12 in new construction or renovation | At least 12 | At least 12 | No mention |
Filtration | HEPA filtration if re-circulated | No mention | HEPA filtration if re-circulated | No mention |
Air distribution pattern | Appropriate directionality | Controlled direction of airflow | No mention | No mention |
Special comments | – | – | – | Increase frequency of cleaning and maintenance of HVAC systems should be considered |