Fixed (or Picture)
What it is: It doesn’t open but offers unobstructed views.
Pro: A small one can brighten up a stairwell, while a large one showcases an amazing vista. A fixed window comes in many shapes. Plus, no drafts here: It’s completely airtight.
Con: You won’t get any ventilation, of course, and you’ll need to clean the exterior from the outside.
Cost: About $60 to $2,600.