Overnight - I have it set to 62F (17C). While we are away from home - its about 66F (19C). When we are home it varies based on how we are feeling. I have it set for 66, but it often gets popped up to 68 -72 (19-22C). 72 is rare, it is usually when someone is feeling ill. My worst monthly hydro bill can easily be over $800. We have electric heat in the house, plugging in 2 vehicles, and in floor heating in the shop that is set for 53.5F (12C)