How to bargain with the landlord on the heating bill?

It is obvious that the landlord wants more money! 1. Is there a heating fee in the contract? There is no agreement that it should be included (central heating! I can't live! Set out. Find a new tenant! See if you can find it in 1 month. He will measure the loss between them! 3. In this respect, the heating fee is more favorable, such as+100 yuan per month, etc ... consider it yourself! I'm more concerned about the first one.