The choice of door is not easy. To make your purchase you should know at least the basic parameters correspond to even the tightness and sound insulation. It is fundamental to the door dimensions – the width, height, so as to perfectly fit into the assigned no hole in the wall. As for the parameters are:
-Isolation heat is defined as U and should be less than 2,6 W / m2.
-Isolation acoustic door is referred to as windows, or in decibels, the lower the value the better the protection, in the case of doors normally amounts to 30 dB.