Hi there, I live in an apartment block (consisting of roughly 50 units) and since moving in a year ago I've been having incredibly high gas bills. I've done a little bit of research on this and have come to the conclusion that my building must have a communal hot water system which is contributing to my high gas bills. We are a 2 bedroom unit with 3 people living here, (soon to be only 2). The only appliances in our home using gas other than apparently the hot water is our stove and oven. Over t ...