I can't imagine that little thing doing much good... even in a room the size of a camper shell. BUT I could be wrong. I also find Mercola products to often be over-priced. Just my two cents.
Many years ago we had room purifiers, due to my son's allergies to cat dander and asthma.
I searched online for several months to learn what a person wanted and didn't want in an air purifier. Then I read reviews. Reviews not written on company websites. Companies can filter out the reviews they don't want visible.
I also obtained info from Consumer Reports.
Unfortunately, the brand I decided on is no longer around.
If it helps any... I kept going back on forth on the brand I chose and Honeywell purifiers. Maybe look at Honeywell?