While its difficult to directly measure the effect that this air filter is having on the environment with any degree of certainty without tools to measure air quality it certainly seems to me to be doing a good job

The only complaint i got the activated carbon filter and apparently during shipping some of the black dust got into the container an left noticeable black marks on a few places on the outside of the filter case

You can sign up for an automatic filter replacement program where the new filter is delivered automatically when its time to change every six months is recommended in order to maintain the 10 year warranty