The first thing you need to pay attention to is the coefficient of resistance to heat transfer, the higher it is, the better.
The second is the number of cameras. If you live in an area where there are no severe frosts, then you should pay attention to the three-chamber profile. If there are severe frosts in your area, it is very windy or very noisy, then it is worth installing a five-chamber profile.
The next is the thickness of the partitions.
In general, almost all manufacturers of window profiles produce products that meet the above requirements. Therefore, when choosing a window profile, you can rely on taste sensations, namely the design.
If you have not yet decided on the manufacturer, we advise you to pay attention to the ASPEN Profile Technology window profile.