Important characteristics refer to:

• Water tightness (EN 12208:1999 - 1027:2000)
• Permeability to air (EN 12207:1999 - 1026:2000)
• Resistance to wind load (EN  12210:1999 – 12211:2000)
• Thermal insulation  (UNI EN ISO 10077-1:2007)
• Acoustic insulation  (UNI EN ISO 140-3)
• Dangerous substances

Windows: how and what should be tested?

When tests on samples are carried out, there are two things that can be done:

1) acquiring a "desired" result

2) acquiring a "real" result

As the UNI norms are norms and not laws, that are to be observed in order to guarantee compliance of the product itself, some companies carry out "studied" tests on samples in order to acquire a desired result and therefore provide the customer with manipulated data.

Nurith has carried out its tests in extreme conditions, meaning that a balcony door of 160cm in width x 250cm in height (a very unusual dimension for our homes, but chosen to extend the results of windows of a size smaller than that of the  tested sample) in order to acquire a real result.

CLASS improves with a dimensional reduction in the window.  It is easy to understand that at the same conditions, carrying out a test on a "smaller" window will generate a better class for a balcony window and also for a window.