24. Many times when we put filtered water in the electric kettle or in a pot to boil it, a white residue can be observed. Does this mean that my water is not clean?

Your (filtered) water from the CAMELOT systems is clean. The white residue is metallic salts like calcium, magnesium etc. which must be in our drinking water and which must not be retained by our systems.

They simply settle at the bottom and the walls of the kettle or the pot during boiling and the partial evaporation produced.