The KF 510 is a versatile Internorm profile available in both uPVC and uPVC-Aluminium composite, and the newest of our four KF window and door systems available for commercial projects, including Passivhaus. Easily identified thanks to a particularly slim profile, the triple-glazed KF 510 provides the end user with a larger glazed area, maximising light transmission and improving overall quality of life as a result. All the while, it offers the same outstanding performance levels as you’d expect from a premium Internorm profile, including Internorm’s I-tec Secure.