Inexpensive PVC windows are made according to the European standard RAL, which means compliance with all quality and environmental standards. The guarantee for the profile in Veka windows is presented to the manufacturer for a period of at least 50 years, while the guarantee is at least 20 years on the double -glazed window. The installed Maco fittings with a guarantee of 10 years has an estimated durability from the alleged daily opening of the cover of a period of 60 years. The reliability and thermal insulation of the windows are so high that they are able to provide reliable protection of the room from the cold, even with winter frost 60 degrees.