Thanks deptryk

That's what I thought..then of course one starts thinking. Where is the outlet for the incoming conditioned air? For circulation..flow in must equal flow out. I suppose the door design is such that it just leaks out around the seams. Okay. Now cooling air in a hot door will cause condensation within the cavity. Doesn't sem to be a good thing. The hot air in the winter may be a plus... oh well german engineering.