Convenient, or rather

It is obvious that if in your absence the windows should be closed with something, and with your presence they are open, then only shutters come to mind, because the armored window will be much more expensive. But traditional shutters are not always convenient, or rather, they are almost always uncomfortable, because even if the cottage is one -story and she has only a few windows, the procedure for opening and closing windows in the cold will not give you pleasure, not to mention the fact that the cottage can be two -story.