Have never seen any condensation inside the unit.
Have had no problems with condensation in the Edgestar in any way. I was running 65/65, and some were smoking a little dryer than I liked so have gone to 66/67.
There is a condensation drain, that drains into a small external pan only accessible from the back. The drain has a small coil (which I believe to be a capillary tube) which when the unit is running is hot. The coil causes any condensation that gets into the pan to dry out. I have seen signs of some condensation reaching the pan but have not seen it damp. Nor have I had any funky smell in the small walk-in closet, which happened several times when I needed to clean out the drip catch pan on the 32 bottle Whynter wineador.
After ownng close to a year now, I was thinking just the other day how happy I have been with the Edgestar/Avallo/Johnson combo and that it has worked out really well so far.
With the avallo humidification unit and Johnson T-stat, the internal readings inside the boxes have been quite stable both for temp and RH.
I did have to learn to trust the Avallo setting as being where the RH inside the boxes would stabilize. Originally, I fiddled with the settings too much until I realized that the cigars had to stabilize within the boxes and that takes a good while longer than I had been thinking. And they stabilize at different rates. Also had to realize the one internal hygrometer I leave out that I can see through the door fluctuates so much on RH, it really is more of a double check on temperature and the only readings that matter are from the hygrometers inside the boxes.
If anybody decides to actually purchase one of these, I could probably find the pics I took as I went along, and post them to a cloud or similar. I would be glad to get on the phone and give greater detail on routing lines, etc. I have never felt like writing up the verbage to explain what was transpiring in each pic, which is the reason I haven't posted the series.