Air Conditioner Vent Open or Closed

So your wondering if it is better to have that air conditioner vent opened or closed? Well it usually is preference depending on what you are looking to do. If you close one in one room the air you save from that room could be utilized in another room at a stronger stream. As well though, when closing make sure you don't have any leaks in your vents because you might just end up losing the air .