I bought an aranet4 which is excellent for co2 but it doesn't do pm or vo2. I can however infer that if the co2 is high I need to ventilate anyways. Crazy to se

I bought an aranet4 which is excellent for co2 but it doesn't do pm or vo2. I can however infer that if the co2 is high I need to ventilate anyways. Crazy to see how high co2 rises on flights that are supposedly "refreshing air" often.