You’re better off keeping the lower floors warmer imo as heat rises and will eventually make its way upstairs. I would suggest keeping the T-stats low but not off, keep them at 60F if need be but if you go from freezing to 72F you’re just defeating any savings.
If you have electric hot water don’t forget to turn down both elements (if you have two) to about 130F - they run 24 x 7 and can really eat into your bill. Shower with a friend.
A good way of saving some energy is to put a water tank blanket on your hot water heater. It’ll insulate your tank, keeping your water warmer, longer.
A good way of saving some energy is to put a water tank blanket on your hot water heater. It’ll insulate your tank, keeping your water warmer, longer.