@AlexSanterne that's actually one of my motivation to go from an appartment in a shared building to a house. Because I tried a bit, but a few months ago we just replaced the broken main collective heater from gas to ... gas.... I asked to look for heat pumps instead, but it was some kind of emergency (we had no heating at all until end of november), and before that emergency, I was told it is too early to speak about it, let's wait until we need to replace it 🙄