Casement Windows - Maybe Not The Best Choice.

Casement windows look nice to my eye, but when my friend installed them in his home last year I learned a few things. First dissapointment: can't fit an AC unit anywhere. His home is heated with hot water radiators, and although ductless AC units are widely available, it's just not something he considered. Usually a simple window unit in the bedroom is enough. In this situation, casement windows are not the best choice.

Casement windows are also more exposed to the elements than double hung windows.
Because casements open outward, the edges are exposed to sun, rain, snow, and more. The top edge particularly is exposed and gets weatherbeaten fast. Again, it's easy to rush to judgment and promise that you will religiously close your casement windows prior to the rain, think again.

Casement windows have mechanical parts that can break.
Most casement windows have a kind of crank which you turn to open and close the sash. Compared to the easy operation of a double-hung window (slide up, slide down) or a slider window (slide left, slide rigth), a window crank is very complex and prone to breakage.