These fixtures allow the free movement of air in and out of the crate. (mypetneedsthat.com)
There are also elevated or raised dog beds that allow for the more efficient movement of air for greater comfort. (mypetneedsthat.com)
My submission is that one needs only to observe whether the net movement of air over the entire globe at the surface is either from poles to equator or vice versa. (newclimatemodel.com)