Activated carbon is a form of carbon processed to have small, low-volume pores that increase the surface area available for adsorption of colour, odour, chlorine and chemicals in water treatment. The Cintropur granular activated carbon media is ideal for treating rainwater and town supplies. Due to its high degree of microporosity, just one gram of activated carbon has a surface area in excess of 1000 m2 (10,763 sq ft), as determined by adsorption.
Lets look at the carbon container on the Duo-CTN & TIO units in the image below. It has a volume of 0.57Ltr, so thats around 273,600 m2 of surface area! Compared to carbon cartridges more commonly found in most filter brands the Cintropur carbon water treatment units provide the most efficient treatment and are the most economical to maintain.