<p>No. 65 is much lower than most people would consider reasonable in the winter. The temperature your room mates have set is not unreasonable at all. When you are sharing an apartment or a house with other people you are all responsible for an equal portion of the bills. If you don’t like it then you need to find your own place and live on your own (which will cost you much more). No one is going to want to room with someone who does not want to pay their share of the bills. (And the landlord is definitely not going to care that you don’t want to pay.)</p>