This is ours - it’s deffo not as big as yours but I think you can go bigger with Rationel. The sliding function is super solid and we have a plan to maybe have a bench on the outside of ours at some point
Ahhh yes we have a similar mech in our office window although far less fancy windows... 86x96, OW70 windows from Associated Glass, pretty sure you can go a bit bigger too.
This is ours - it’s deffo not as big as yours but I think you can go bigger with Rationel. The sliding function is super solid and we have a plan to maybe have a bench on the outside of ours at some point