Similar for me. I was floored when I saw the bill. Most if the cost is for fuel purchase. Thing is, this apartment is small, 2 bedroom only, but drafty as hell. LL has received info on incentives for insulation/windows, but nothing so far. Our rent is sub for this area due to a very steep driveway that most won’t accept, so we’re stuck until we buy a house… whenever that happens. Our thermostat is the older puck-type, so no C cable. I’ve been on the fence about an adjustable thermostat, but we rent.