Greetings from New Hampshire - the coldest place on earth according to the weatherman. We recently bought a 100 year old house with a forced hot water furnace that is sucking us dry in terms of oil usage. We had the repairman out last week and he said it is at least 35 years old. Still running though! Repairman said it is getting hard to find parts and the thing isn't very efficient. Yeah, just ask our wallets. OK, so it was built before anyone ever heard of an energy crisis or gasoline lines - remember those? The question is, should we replace it? I called around and got differing answers from different companies. Some said yes, some said no. Meanwhile it is chugging along and using oil like you wouldn't believe. Should we leave it alone since it is running fine, or should we consider replacing it this summer? Thanks!