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.

Hey studio3600 - so picture hangers work with heavy frames/large paintings as well?we dont get them in India so will have to order online - do suggest the best company for this thanks so much!

16' long is a lot of room. Can you post a pic of the rest of the room? Remove every door you can. Every doorway does not need one and doing this one simple thing will remove a ton of bulk and make your space feel more open - no need to remove the hardware if you think you might want the doors back sometime in the future. Are you up for painting the walls and possibly the trim? Is this a sectional? If so, you might have to split it in order to get it to fit. The curtain into the bedroom is a good thing. I have used that idea, I love it, and I am not from India! Change them out for a lighter color and add panels to the ones you have - make them at least 3x fuller than the doorway. Pull them all over to the hinge side of the frame after the door has been removed. Your pictures need to be rehung and you can address that once you have found a furniture arrangement that works.

There are lots of self adhesive wall papers with lot of good design n sizes u can stick them over it no need of professional help but try to get waterproof or the one u can wipe it with wet cloth some of the available on Amazon n cheap way of remodeling ur furniture look... I hope this can solve ur problem