@Ikat0 @linseymarr @citlanx @kprather88 @JimRosenthal4 @BarryHunt008 @CorsIAQ @jljcolorado 1. You don't have any way to know filtration is working well all the time, so outside air/CO2 is a worst case measurement.
2. Filtration doesn't help with the cognitive impairment from high CO2.
@Ikat0 @linseymarr @citlanx @kprather88 @JimRosenthal4 @BarryHunt008 @CorsIAQ @jljcolorado 1. 您无法知道过滤一直运行良好，因此外部空气/二氧化碳是最坏的情况测量。
2. 过滤对高二氧化碳造成的认知障碍没有帮助。