So if your closet is 72 wide using 2 doors each 36 wide will cost less than using 4 doors each 18 wide.
Sliding doors vs bifold doors for closets.
Installed to fold back to one or both sides bi folding doors are a nice alternative to sliding doors because they give you access to the full width of your closet and only take up half as much floor space as a swinging door.
Sliding doors are going to offer the most unhindered view of the outside.
If you want reduce the amount of frame and maximise glass sizes making the most of the view go for sliding doors.
However bi fold doors only offer a full view when completely open.
If you need full access to the closet or you just want to be able to open the doors and see everything at once then bifold doors are your best choice.
If you want to be able to fully open the doors to give the seamless transition from inside to outside then go for bi fold doors.
Both types of closet door options work well enough initially but are prone to problems during normal use.
Bifold closet doors with 3 1 2 louvers what if bifold doors are my only option.
If you have strict thermal value requirements you may need to opt for sliding doors.
Go for two large panels one sliding over the other to give two wide apertures.
In choosing between bifold and sliding closet doors the main factor to consider is the size of your closet opening.