The only place I've seen carbon pellet filters commercially are in things like marijuana grow tent filters and here: http://www.air-purifier-power.com/sharpwash

The only place I've seen carbon pellet filters commercially are in things like marijuana grow tent filters and here: http://www.air-purifier-power.com/sharpwashablecarbonfiltersweetodor103009.html http://www.air-purifier-power.com/sharpwashablecarbonfilters... Unfortunately it seems like the air filtration market as a whole is incredibly prone to snake-oil claims. As far as your idea goes, I'm not sure. And I don't have a great idea of how to test something like this. I've seen bags of activated charcoal marketed as something you can leave around for better air (sounds like bs).