> The "thermal window" seems rather narrow Indeed, it's not that big. But: > If that is accurate it means that for most of the winter (and possibly part of th

> The "thermal window" seems rather narrow Indeed, it's not that big. But: > If that is accurate it means that for most of the winter (and possibly part of the summer) the device is off. This obviously depends on where you live, but when I think of Germany (or look at data of it [0]), this might be very well large parts of September/October till around March/April... Not bad, when you try to run this system as little as possible. [0] https://www.wetter.de/klima/europa/deutschland-c49.html https://www.wetter.de/klima/europa/deutschland-c49.html