Portable air purifiers with HEPA filters installed at more contained spaces to further clean the air
In more contained spaces, such as transfer holding areas, staff canteens and food courts, staff rest areas in the new segregated zones across the terminals and at heath scanning stations, portable air purifiers with hospital grade High-Efficiency Particulate Air (HEPA) filters have been installed. This is to further mitigate the risk of airborne transmission of the Covid-19 virus.
This increased protection means that after the air in the terminals has been scrubbed by the MERV-14 filters, the portable air purifiers with HEPA filters further cleans air distributed into the building interiors, removing more than 99% of any remaining particles. Depending on the air purifiers’ capacity, it takes just three minutes to clean the air in an area about the size of a two-room flat.
Low Carbon Dioxide Levels, High Indoor Air Quality
Changi Airport Group worked closely with health agencies and performed several smoke diffusion tests to ascertain that the design of the indoor air flow does not contribute to any adverse movement of air from higher risk to lower risk zones. For quality assurance, CAG also conducts regular checks on indoor air quality, including measuring CO2, air pollutants, humidity, temperature and flow rates.
With these multi-layers of protection in place, the Carbon Dioxide (CO2) level in Changi Airports’ terminals remain constantly low, at less than 500 ppm (parts-per-million). This is nearly 30% better than the allowable CO2 level stipulated in the Code of Practice for Indoor Air Quality. Hence, visitors can be assured of good ventilation and higher quality indoor air every time they use Changi Airport.