> and you literally heat each other so actually-fair costs are fuzzier What you're describing is closest to "actually fair" I think we can get. A neighbour of

> and you literally heat each other so actually-fair costs are fuzzier What you're describing is closest to "actually fair" I think we can get. A neighbour of someone I know leaves their apartment empty for long periods of time and when they're gone they just shut off their heating completely and leave all of their neighbours to pick up the bill - each apartment has their own heating system but they share walls, floors, and ceilings.