Fixed windows are a major part of the Integra system. Being non-openable they are the most minimalistic product of the system with slimmest lines. With its aesthetic fully wooden frame and glass combination, they are also known as picture windows, as they provide a clear view of the surrounding environment without any obstructions.  Windows that do not open are also the most flexible parts of the Integra system with many possible shapes, sizes and combinations available. As there are no opening mechanisms nor other clear limiting factors, in practice only the sheer size of the glass and thus the product matter. Because of these factors, the range of possible sizes for a fixed window are very broad and a single casement element with its longest side of up to 4m comes as standard from the production line.