 In summer 2014 Vollmer and Viessmann model GmbH announced that Viessmann acquire the license in the brand Vollmer and that from September 2014 the Vollmer products will be available for the market.Excluded volume

The concept of excluded volume was introduced by Werner Kuhn in 1934 and applied to polymer molecules shortly thereafter by Paul Flory.In liquid state theory, the 'excluded volume' of a molecule is the volume that is inaccessible to other molecules in the system as a result of the presence of the first molecule.