Floor coverings for interiors are classified in so-called utility classes according to ISO 10674, labelling the application area of a certain type of flooring. There are utility classes from 21 to 23 and 31 to 34, which differentiate between the application areas “Residential” and “Commercial” – with moderate, normal and heavy use. Classification by utility class is intended to facilitate consumers and fabricators with the choice of flooring for the right application area. To ensure uniform labelling, the utility class is shown with standardised pictograms.