hi, another climate thread: sometimes, without which I can reproduce it as much as I want, the air smells like…yes, after what actually, hard to describe. I don’t know if “muffy” is the right word, that’s always subjective, in any case I get heavier air through this smell and must turn off the ventilation then, because my brain tells me “age, turn off, otherwise soon no air at all!”. so, but now the funny thing: 1. it’s not always, and 2. immediately, as soon as the air conditioning is on someone an idea? mfg