Chamber system

The term chamber system refers to the type of construction used in uPVC windows, in which several air chambers sealed off from one another within the frame profile are intended to provide optimal thermal insulation. The insulation values of uPVC windows with more air chambers are usually better. Only the Uf-value, which indicates the thermal transmittance coefficient of the frame, allows a precise statement to be made about this. The first uPVC windows were fitted with only a single chamber and therefore did not offer good insulation. Modern windows have multi-chamber profiles and extend up to the 7-chamber system, often referred to as insulating chambers.