You have no idea how many people don't realize that shutters weren't always purely decorative. In my region actual hinged shutters are a thing of the past, replaced by lame cheap plastic accent pieces that just screw onto the wall.

A good set of shutters with appropriate hardware could mean the world of difference in how your house performs in hot weather. They tend to blow off in heavy storms, but a stronger hinge and latch is all it takes to prevent that. I grew up with a set on my bedroom window, and it was awesome for night shifts too!