In accordance with the Regulation (Dz. U. nr 152 poz. 926) from January 1st, 2017 will change the requirements concerning of thermal insulation of windows and doors for new construction.
In this case Uw coefficient cannot exceed:
for windows - 1,1 W/m2K
for doors - 1,5 W/m2K
The choice (purchase) of windows with the given coefficient depends only on the customer and the company does not take any responsibility for his decisions. This regulation applies in the product sales on the territory of Polish Republic.