From “Ask Kit!”:
Q: Do you turn off your heat at night or keep it on?
A: It seems to me that if you need heat in the winter it’s prudent to leave it on day and night. For guest comfort you’d leave it on for sure.
One solution to your question about climate control is to have individual climate control in each guestroom. Individual climate control allows each guest to have a temperature they are most comfortable with during their stay.
For environmental reasons I would ask guests to be sure to moderate the room temperature (turn heat down or AC up) as well as turn lights and the TV off while they are away for the day. Another benefit of individual climate control is that you can moderate a unit (heat down in the winter, AC up in summer or off) in unused rooms saving money and natural resources.