Somebody told me one time and it sounds reasonable. They said that the average person will be lucky enough to need to replace or install a heating system in a residential house 1.3 times in their lifetime on average. I am not sure if it is true or not but it makes sense unless you are a builder or something like that. That would say if you do replace that old furnace there is a good chance you will never need to do it again in your lifetime, and sorry to say it is your lucky day. Financing Available with your approved credit. We accept all major credit/debit cards. Let's get it fixed up and check that one off the list.