The new window IGLO ENERGY Classic is designed to provide customers with the highest satisfaction when it comes to the energy-saving , modern design and technological advancement that responds to stringent market requirements. IGLO ENERGY Classic is distinguished by the lowest coefficient of heat transfer for the whole window. Such a result is an excellent result in terms of energy-efficient windows and confirms excellent insulating properties of the new product. The window has an innovative sealing system, available only in DRUTEX’ offer, that guarantees great performance concerning the energy efficiency. This is the first solution of that type in the world that is equipped with the central gasket made of foamed EPDM. IGLO ENERGY Classic is an investment in the above-average quality and the highest degree of efficiency. This is the window, which allows you to stay warm regardless of weather conditions.