Vortex could only have been created or generated because two windows, or a window and a door was open at the same time. I know this to be true, because whilst I was staying in the next apartment block which had a very similar design to the layout inside apartment 5a, I carried out and conducted experiments to see what could have caused the vortex which Kate McCann describes having occurred. The fact is, that if the bedroom window had been open when Kate first opened the unlocked patio door to enter the apartment at the time of her 10pm check, the bedroom door would almost certainly have slammed shut at that stage or time. Similarly, if the door on the roadside of the apartment had already been open when Kate entered apartment 5a via the unlocked patio door, the bedroom door would again have slammed shut by the dynamics of the vortex, aforementioned...
Fact is...
When Kate entered apartment 5a at the time of her 10pm check, there was no window or door open, otherwise the bedroom door would have almost certainly slammed shut, but it did not, at least not until later...
I was very meticulous in the way I carried out these experiments, and I came to the conclusion that if Kate closed the unlocked patio door behind her when she first went into apartment 5a during her 10pm check, then of course there could be no vortex to cause the bedroom door to slam shut once she had closed the patio door, as she claimed she had done, providing the bedroom window, or another door (roadside) was not open at that time or by that stage. So in a nutshell, when Kate entered 5a, via patio door there was no window or other door open at that stage. She then closes the patio door and goes to check on her children...
As she walks inside apartment 5a, she makes her way to the bedroom door which has not slammed shut at this stage. She can see the door on the roadside of the apartment and it must have been closed otherwise she would have easily been able to see it in the open position? But let us assume that the roadside door is fractionally open and Kate did not notice this for whatever reason, and she pushed the bedroom door open and takes a peak inside and reports that she could see the twins, but did not physically see Maddie,. But what she notices is that the door is slightly open wider than when it had been set earlier when she and Jerry had gone out to eat. She resets the bedroom door and then Whooosh, the bedroom door slams shut, and she quickly opens the door to the bedroom and as she does so, the curtains fly open and she can see the window is open and the steel shutter raised...
Sorry - I just do not believe this account, it is too far fetched and can easily be exposed as untrue...