I have a high sleeper in my room (width 3,70m, length 4,50m, height 3,30m) consisting of one large plane (yellow) and one window (darker grey). The plance leaves about 80cm space to sleep. The door (not visible) is under the plane and should be irrelevant because it remains closed over night.

[![enter image description here][1]][1]

The space between plane and ceiling tends to get hot relatively to the room temperature because warm air rises up. Opening the window (tilt or completely) is not a problem, but the cooling only has a small effect close to the floor of the room - without moving air/wind -, and as good as none under the ceiling for hours.

Therefore I'd like to transport cold air from outside inside the room to create a stronger/faster cooling effect. I'm considering a system with multiple small vents. Which direction of airflow would be advantageous? Blowing warm air outside? Sucking cold air in? Laying out airflow in a line (e.g. from window to bed) or in a circle? Directing the airflow close to the ground or the ceiling?


  [1]: https://i.sstatic.net/KYmdK.png