Still, stale or low air flow orchids

[Ray]

I agree on the dendrophylax, but I think the original question isn't dead-on.

Plants don't "prefer" a breeze. The idea behind air movement is to prevent stagnation. In a small volume with an opening, evaporation alone, provides some movement of air - vapor escaping and fresh air replacing it - preventing stagnation. It's only in larger volumes that are closed or have internal obstructions (an overcrowded greenhouse, for example) that forced flow is truly necessary.