I never claimed anyone did say BR testing correlated to ISO testing standards ... it obviously doesn't, but some take it as an accurate test and ranking. What I'm saying is some people believe that the Boss is better efficiency compared to some of the other filters that BR tested, but how can that be when official ISO test info (including the M+H spec sheet that shows it at 99% at >46u for the model of Boss BR tested) does not support that same ranking to others tested. Maybe you get it, but many others watching YouTube don't seem to.