If you need a New Flue Liner get a Professional to Install it You may not realise you need a new flue liner. If you haven’t had it replaced in recent years, it may be time to do so. If it hasn’t been done since you have lived there, it should be evaluated. Contact a professional new flue liner installation expert to evaluate it. They may discover it is old and outdated, and recommend a new one is put in its place.
They may tell you it is just fine and when they recommend it should be checked again. This will give you peace of mind that it is doing what it was