@Vax4Littles @michael_hoerger @KyleMcnease Filtration doesn't help CO2. High CO2 may indicate good filtration put poor fresh air exchange. Still bad, high CO2 reduces alertness and mental acuity.
@Vax4Littles @michael_hoerger @KyleMcnease 过滤对二氧化碳没有帮助。高 CO2 可能表明过滤良好，新鲜空气交换不良。仍然很糟糕，高二氧化碳会降低警觉性和精神敏锐度。