So I have a 12x12 tile lined brick fireplace with a 6" uninsulated SS liner exiting from my Lopi Freedom insert. I have burned the stove the past two seasons, and I am now looking at adding some insulation and a block off plate to improve efficiency. The question is, if I use vermiculite do I have to go all the way to the top of the flue?
Thanks,
Mike
Thanks,
Mike