If there’s two mass, which created a gap, it will make the wind converge together and blows tightly, tighter than without any little gap. The basic principle is the wind will blows tight through a little hole or gap. That’s the purpose of Wind Tunnel System; make the wind blows without using Air Conditioner. There are two holes of Wind Tunnel System, it’s vertical and horizontal. The wind will enter this horizontal hole tightly, trapped inside this room, and to keep this room on it’s comfort temperature, the warm air will be transfered to the outside through the holes where located above the stairs (axis vertical), it’s more like stacking effects.