In my case - I have central heating, but it’s not enough, sometimes it’s +17/+18 in a living room. So, need to use some extra electric heating anyway. Why not use #Bitcoin miner instead of ordinary electric heater, at least I get some sats back from electricity spent. Ok, there is downside - noise, as for some reason only one of replacement more quiet fans work. Plan is to figure this out at some point, but haven’t get to it, always other stuff to do.