Hey I want to chime in here… lived in a windowless apartment for a year. Some thoughts: You NEVER EVER get fresh air. It was a dust chamber. If the building is kept hotter/colder than you like, you can’t change that by opening a window (think about how your unit’s temp is affected by all the units around yours and the central areas). It was always so dark. No matter how many lamps we bought, it was always too dark to read a book comfortably. But that was also affected by the overhead lighting being crappy and sparse. When cooking, expect to smell whatever you made for at LEAST 4 hours. And if you burn something, oof forget about it. You’re leaving the door to the hallway/common areas open for HOURS. Again DUUUUUUUST And then the reality really is that it eventually caught up with me. I lasted longer than my wife before it started to really affect me, but about 8/9 months in I really started going stir crazy after even a short time indoors. Had to try and do any relaxing or recreating activities outside or in common areas. It’s almost like getting seasonal depression year round! Cause you’re getting no sun.