The temps in my house are about the same as yours but they are too cold for me. Unfortunately the house doesn't hold heat well. We have a large entrance door that is all glass and steel and lets out a lot of heat. The windows are quite cold too and a lot of heat escapes that way. The cost of gas is quite high here so we also try to keep it down as much as possible. It is not so cold outside here yet but we need the heat on cause the house is cold now. One of those houses that is hot in the summer and cold in the winter no matter what you do. Ideally for me I would prefer it to be about 22° C or 72° F but that is just me.