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Fixed window
Credit: Aimee Herring

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.