proEnergyTec starts acting where the standard window stops. proEnergyTec enhances even more the KBE windows that are outstanding to start with. This technology is used to produce prefoamed profiles. As a rule, window systems consist of several empty chambers. Simply because air insulates better than PVC-U. In the form of its proEnergyTec, KBE has developed a foam that can be introduced easily into the PVC-U profile, enhancing extremely the thermal insulation at the same time. proEnergyTec can enhance the KBE profiles to a certified passive house system. The good thing is, proEnergyTec profiles can be manufactured just as easily as their unfoamed counterparts, and so do not involve extra work. Furthermore, full recyclability is assured. proEnergyTec windows embodies what KBE understands to be very well insulated and yet sustainable windows.