How do you decorate your place, what kind of style, colors, and feelings? That will greatly influence the type of door you might want. Also, think of your budget, and whether you want to install it yourself or hire a professional (you don't need to tell us, just keep that in mind). Then look around Houzz, in the products page, they have lots of interior sliding doors and hinged ones, from elegant frosted glass in a dark wood frame, to rustic reclaimed wood planks. You may not want to purchase that exact model, but it might give you a better idea of what would fulfill your airflow needs without sacrificing style.

Debbie, acm - Thank you very much for responding. This is a new apartment and not a remodel. I have attached the floor plan of the room & closet. In the photo below the closet is the space "DRESS" and having dimensions 5 ft 11" (X axis) x 4 ft 7" (Y axis). For representational purposes, the diagram shows an L shaped closet. Ignore that - this is a complete blank space. I am instead planning on putting the closet along the 5 ft 11" wall- but on the opposite side instead of the side shown in the diagram. So imagine my closet along a single wall, set against the wall marked with a thick dark line. acm - I did not mean a bi-fold. But rather the traditional shutter door which some may refer as a swing shutter. My dilemma is - should i use sliding doors or regular doors ? I divided my closet into 4 major compartments, each 1 ft 6" wide. So there are a total of 4 doors. Depth of closet is 2 ft. Hence walkthru space is 2 ft 6". When a closet door is open, there wld be 1 ft space between the open door & the wall. Within each of these 4 compartments, I have designed multiple external drawers upto 2 ft height from base. So the shutters/doors planned only for the portion above 2 ft. Sliding Doors - Pros - Swing space not needed. Can place a slim dresser in the corner if I want to later. Cons - Expensive as it will needlessly cover the bottom-most drawers; Sliding doors coming off rails. Regular Doors Pros - Inexpensive. Can be used to cover only the part above the drawers (need not cover drawers). This way I can open the drawers below quickly & easily. Cons - Not sure if 2 ft 6" is enough clearance space to open 18" doors. Hope this makes sense. What do you suggest?

you could also do french doors. either with windows or without. Don't know if you could do a pocket door. that's the sleekest option but more work.

It’s a second floor( top floor) and for a spacious look I was planning to retain the balconies as it is and have a sliding upvc door right in the middle of the wall which separate rooms from balconies. N of course do away with existing doors n windows on the above mentioned walls