The three-chamber German REHAU profiles which were up-to-date 5-10 years ago, give way to the new profile systems with lower factors of heat transition and bigger building width. The REHAU systems EURO 60 with 60 mm building width are mainly applied for orders with limited budget but they have heat transition factor for the profile 1,6 W/ m2 K and a good glazed glass (Ug=1,1 W/m2 K) which allows achievement of results under the limits defined in the change in State Gazette from 29.10.2009 of Regulation No.7 from 15.12.2004 for heat preservation and energy economy in buildings.