Hi everyone. Just bought a 1 story mid century ranch with a Hearthstone wood stove connected to a chimney without a stainless liner. While the draft seems decent, starting a fire isn't easy and the stove doesn't put out quite as much heat as I would have expected. I'm a novice with wood stoves so it's very possible that I just don't really know what I'm doing. The big question is do I need a stainless steel flue liner? I have some people telling me I absolutely need one, but then the guy that has serviced the chimney for many years for the prior owners says we definitely do not need one. Photos attached. What do you all think, do we need a liner? Would a liner help the stove's heat output and improve the draft? I was wondering if a lot of the heat was being lost into the chimney and that a liner might help with that...