The KÖMMERLING 76 system represents a significant advancement in PVCu technology, specifically engineered to surpass the 2022 Building Regulations for both new builds and replacements. At its core is a sophisticated six-chambered design that provides double the performance of many standard systems, achieving exceptional U-values of 1.2 W/(m²K) with double glazing and as low as 0.78 W/(m²K) with triple glazing. 

This thermal efficiency is complemented by a high-performance sash lip that ensures unrivalled weather resistance and superior acoustic insulation, making it an ideal choice for maintaining a quiet, energy-efficient home environment.

The 76mm frame depth is versatile enough to support large-span glazing areas, offering structural integrity through various reinforcing options. For properties requiring a heritage touch, the system can be configured with dummy sashes to replicate the balanced proportions of traditional period windows. 

By utilizing a larger opening sash at the top and a smaller fixed pane below, homeowners can achieve a classic sash window aesthetic without sacrificing the modern functionality of a casement system.

Sustainability and customization are central to the design, with a lead-free, high-impact composition that ensures the frames remain colourfast and environmentally friendly over a long lifespan. 

The system accommodates a wide range of glazing thicknesses from 28mm to 50mm, allowing for tailored energy and security needs. Finishing options are equally flexible, featuring a diverse palette of colors and a variety of hardware styles that range from sleek contemporary handles to more ornate traditional fittings, ensuring complete integration with existing doors or tilt-and-turn systems.