At only 14 months old that furnace should be fine but you never know. Do you have any idea how many times that furnace has been used? It takes quite a while to get the oils to burn off a new furnace heat exchanger. It will produce an acrid offensive smell that will burn the eyes and nose and be most unpleasant. All I can suggest is run your furnace as much as you can when you aren't in it and see if it clears up. Ours took about 2 tanks of propane to clear it up. I am able to keep my unit at home so I ran it in the winter when we were not using it. It did finally go away.
