Aluminum structure, self supporting glass, limitless number of rails, ah!60 thermal insulation up to 0.708W/m².K, sound insulation: 44 dB, security RC4, ah!38 thermal insulation up to 0.816W/m² ...

From traditional sash windows to modern sliding windows ... These windows sit in frames with vertical grooves that allow the window to open vertically. The windows stay open by counterbalances ...