Fereastră PVC-ALUMINIU KF520 Studio — Triplu, Passivhaus

Internorm KF520 Studio: PVC-Aluminium window with triple glazing and thermal insulation Uw 0,63 W/(m²K), PassivHaus certified. Modern design meets RC3 security performance.

The KF520 Studio is a premium window solution from Internorm, an Austrian manufacturer renowned for high-performance opening systems. The Studio range combines contemporary aesthetics with advanced insulation technology, ideally suited for high-quality residential projects, passive houses, and ambitious renovation schemes.

The hybrid PVC-Aluminium profile leverages the thermal stability of interior PVC with the elegant exterior aluminium finish, delivering long-lasting weather protection. The triple low-e glazing achieves thermal insulation of Uw 0,63 W/(m²K)—a value placing the window in the passive building category and enabling significant heating savings. The air chambers within the profile and glass are optimised to retain warmth in winter and deflect it in summer.

Acoustic performance ranges from 33–46 dB depending on the configuration selected, attenuating traffic noise and external environmental sound. RC3 burglar resistance classification provides substantive protection against breaking and forced entry, making it suitable for residences in urban zones or exposed locations. The integrated I-tec Secure option combines advanced locking systems, balancing security with intuitive daily operation.

The KF520 Studio design embraces refined lines and balanced proportions, adaptable across diverse architectural contexts—from pure modernism to more traditional settings. Extended RAL colour and anodising solutions permit aesthetic personalisation without functional compromise.

This window is recommended for passive houses in temperate climates, renovations requiring enhanced thermal insulation, and homeowners valuing quality over the long term. Professional installation and minimal maintenance ensure durability spanning decades.

The PVC-Aluminium combination provides lasting UV protection on the exterior (aluminium resists discoloration) and superior thermal insulation indoors. The Uw value of 0.63 W/(m²K) meets Passive House and NZEB standards—only the exterior aluminium can sustain this performance long-term without degradation.

Triple glazing isn't justified by noise alone—it delivers exceptional thermal efficiency. At Uw 0.63 W/(m²K), it significantly reduces winter heating and maintains summer cooling. Even in quiet areas, the triple glass pays for itself through energy savings and thermal comfort over 15–20 years.

RC3 is a resistance-to-burglary classification indicating protection against break-ins using tools and heavy objects. The KF520 Studio with integrated I-tec Secure (multi-point hardware and laminated glass) withstands attacks for at least 10 minutes. Recommended for homes in higher-risk areas or for owners prioritizing security.

Internorm's aluminium is anodized and treated with industrial-grade UV lacquers, ensuring complete resistance to corrosion, discoloration, and embrittlement long-term. The triple glass with warm-edge spacer and argon gas maintains insulation even under extreme temperature swings. The interior PVC profile is UV-protected, eliminating the degradation risk typical of PVC-only windows.

The KF520 Studio is manufactured to your exact dimensions—no adapters or force-fitting required. Internorm installation includes technical consultation to ensure proper fit in your existing frame. The PVC-Aluminium profile allows precise integrated tolerances, and the I-tec multi-point hardware is positioned and calibrated for optimal operation without post-installation adjustments.

The KF520 requires no painting, varnishing, or chemical treatment on the exterior—the anodized aluminium simply needs cleaning with water and neutral detergent once yearly. Solid wood demands repainting every 3–5 years, incurring significant material and labour costs. The maintenance savings with KF520 are substantial over 20–30 years, making it the rational choice for owners prioritizing durability without constant visual commitment.