This table shows possible classes and values of performances. The values indicated in red are the ones relevant to this system.
(1)
The Uf-value measures the heat flow. The lower the Uf-value, the better the thermal insulation of the frame.
(2)
The water tightness testing involves applying a uniform water spray at increasing air pressure until water penetrates the window.
(3)
The wind load resistance is a measure of the profile’s structural strength and is tested by applying increasing levels of air pressure to simulate the
wind force. There are up to five levels of wind resistance (1 to 5) and three deflection classes (A,B,C). The higher the number, the better the performance.