For applications that require the removal of hazardous gases like Carbon Dioxide (CO2) and Carbon Monoxide (CO), nano's modular NBA breathing air purifier is the perfect choice. The unique five layer mixed bed cartridge has an integrated filter that removes water vapor, hydrocarbons, odor and taste in the first stage before removing CO and CO2 levels with a combination of activated alumina, 13X molecular sieve mix and activated carbon. This is followed by a catalyst to convert CO to CO2, all materials being snow storm filled for maximum packing density and held in place by an integral 1 micron particulate after filter. The replaceable cartridges make maintenance easy while meeting the most stringent global breathing air standards in a simple, reliable and cost effective design.