Airtight Construction: The core feature is a continuous, integrated sealing system that prevents air leakage, a major source of energy loss in standard buildings.

Thermally Broken Design: Incorporates a non-conductive barrier within the frame to eliminate thermal bridging, preventing heat from escaping in winter and entering in summer.

Exceptionally High Insulation Value: The frames themselves are designed with insulation to achieve a very low U-value, matching the performance of the wall they are installed in.

Robust and Durable Build: Constructed from high-quality, insulated timber to withstand frequent use and maintain its airtight seal over decades.