What parameters should we pay attention to when choosing windows?

When choosing windows, it is worth paying attention to several important parameters.

The most important of them is the heat transfer coefficient of the entire window, marked as Uw. The lower its value, the better. Windows with a lower Uw maintain the optimum temperature inside the rooms, are energy efficient and meet the requirements of passive construction (Uw = 0.8 W/m2K). The width of the building profile (above 80 mm), the type of glazing unit (windows with three panes are the most energy-saving) and the use of an inter-pane frame also affect the thermal insulation of the house.

The tightness of windows can be checked by analyzing fittings and sealing system used in them.  An important parameter, especially in single-family houses and ground floors, is burglary resistance. Feneste offers RC2 class fittings that provide optimal protection and safety. In addition, glazing units with increased breakout resistance are used.

To sum up, when choosing windows, pay attention to the heat transfer coefficient (Uw), the width of the building profile, the type of glazing unit, the sealing system, as well as burglary resistance.