Since I know that there are a few resourceful physicists and chemists here (e.g. Kester/Rotherbach), I’m sure you can take me on for centuries I actually wanted to put an electric dehumidifier in the garage so that the beetle always has a nice dryness. The dehumidifier works like the AC in the car, so that air flows over a cooled area, whereby the humidity condenses. This works quite splendidly in warm air, but under 5 degrees (plus) is dead pants, because that doesn’t work any more. Unfortunately, my garage has almost outside temperature, i.e. the 5 degrees and less are normal in winter. Now, of course, you can heat the temperature to 10 degrees and then run the dehumidifier at the same time. Cost a little bit at today’s electricity prices Has one better idea how to do it? Or is for example 2 degrees at 80% humidity not so bad for rusting, because at the temperature is rather small despite 80% of the amount of water in the air. 10,5 grams of water at only 13 degrees of humidity?