uPVC Sash & 'regular' uPVC windows

Is there any more maintenance involved in having a modern uPVC sash window compared to a modern 'regular' uPVC window?

I know there is more maintenance involved with old wooden-frame sash windows as they have a rope/weights, but modern uPVC sash windows don't have this (as far as I'm aware).

Thanks!

I put UPC Sash windows in the front of my house over 3 years ago. Works perfectly and no maintenance needed!